1,590 changes: 1,590 additions & 0 deletions llvm/test/Transforms/LoopUnroll/runtime-loop-multiple-exits.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -5001,3 +5001,1593 @@ latch: ; preds = %header
outerLatch: ; preds = %latch, %outerloopHdr
br label %outerloopHdr
}

declare void @bar()

; This is a case where we should be able to eliminate N-1 copies
; of the early exit test in the main loop when runtime unrolling
; by N.
define void @test10(i64 %trip, i64 %trip2) {
; EPILOG-LABEL: @test10(
; EPILOG-NEXT: entry:
; EPILOG-NEXT: %0 = add i64 %trip, -1
; EPILOG-NEXT: %xtraiter = and i64 %trip, 7
; EPILOG-NEXT: %1 = icmp ult i64 %0, 7
; EPILOG-NEXT: br i1 %1, label %exit2.unr-lcssa, label %entry.new
; EPILOG: entry.new:
; EPILOG-NEXT: %unroll_iter = sub i64 %trip, %xtraiter
; EPILOG-NEXT: br label %loop_header
; EPILOG: loop_header:
; EPILOG-NEXT: %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.7, %loop_latch.7 ]
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-NEXT: br i1 %cmp_early, label %loop_latch, label %exit1.loopexit
; EPILOG: loop_latch:
; EPILOG-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-NEXT: br i1 %cmp_early.1, label %loop_latch.1, label %exit1.loopexit
; EPILOG: exit1.loopexit:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1.loopexit1:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1:
; EPILOG-NEXT: ret void
; EPILOG: exit2.unr-lcssa.loopexit:
; EPILOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: br label %exit2.unr-lcssa
; EPILOG: exit2.unr-lcssa:
; EPILOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.unr-lcssa.loopexit ]
; EPILOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT: br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2
; EPILOG: loop_header.epil.preheader:
; EPILOG-NEXT: br label %loop_header.epil
; EPILOG: loop_header.epil:
; EPILOG-NEXT: %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT: %epil.iter = phi i64 [ %xtraiter, %loop_header.epil.preheader ], [ %epil.iter.sub, %loop_latch.epil ]
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.epil = icmp ne i64 %iv.epil, %trip2
; EPILOG-NEXT: br i1 %cmp_early.epil, label %loop_latch.epil, label %exit1.loopexit1
; EPILOG: loop_latch.epil:
; EPILOG-NEXT: %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT: %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT: %epil.iter.sub = sub i64 %epil.iter, 1
; EPILOG-NEXT: %epil.iter.cmp = icmp ne i64 %epil.iter.sub, 0
; EPILOG-NEXT: br i1 %epil.iter.cmp, label %loop_header.epil, label %exit2.epilog-lcssa, !llvm.loop !13
; EPILOG: exit2.epilog-lcssa:
; EPILOG-NEXT: br label %exit2
; EPILOG: exit2:
; EPILOG-NEXT: ret void
; EPILOG: loop_latch.1:
; EPILOG-NEXT: %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; EPILOG-NEXT: br i1 %cmp_early.2, label %loop_latch.2, label %exit1.loopexit
; EPILOG: loop_latch.2:
; EPILOG-NEXT: %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT: %niter.nsub.2 = sub i64 %niter.nsub.1, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; EPILOG-NEXT: br i1 %cmp_early.3, label %loop_latch.3, label %exit1.loopexit
; EPILOG: loop_latch.3:
; EPILOG-NEXT: %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT: %niter.nsub.3 = sub i64 %niter.nsub.2, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; EPILOG-NEXT: br i1 %cmp_early.4, label %loop_latch.4, label %exit1.loopexit
; EPILOG: loop_latch.4:
; EPILOG-NEXT: %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT: %niter.nsub.4 = sub i64 %niter.nsub.3, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; EPILOG-NEXT: br i1 %cmp_early.5, label %loop_latch.5, label %exit1.loopexit
; EPILOG: loop_latch.5:
; EPILOG-NEXT: %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT: %niter.nsub.5 = sub i64 %niter.nsub.4, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; EPILOG-NEXT: br i1 %cmp_early.6, label %loop_latch.6, label %exit1.loopexit
; EPILOG: loop_latch.6:
; EPILOG-NEXT: %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT: %niter.nsub.6 = sub i64 %niter.nsub.5, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; EPILOG-NEXT: br i1 %cmp_early.7, label %loop_latch.7, label %exit1.loopexit
; EPILOG: loop_latch.7:
; EPILOG-NEXT: %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT: %niter.nsub.7 = sub i64 %niter.nsub.6, 1
; EPILOG-NEXT: %niter.ncmp.7 = icmp ne i64 %niter.nsub.7, 0
; EPILOG-NEXT: br i1 %niter.ncmp.7, label %loop_header, label %exit2.unr-lcssa.loopexit
;
; EPILOG-BLOCK-LABEL: @test10(
; EPILOG-BLOCK-NEXT: entry:
; EPILOG-BLOCK-NEXT: %0 = add i64 %trip, -1
; EPILOG-BLOCK-NEXT: %xtraiter = and i64 %trip, 1
; EPILOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; EPILOG-BLOCK-NEXT: br i1 %1, label %exit2.unr-lcssa, label %entry.new
; EPILOG-BLOCK: entry.new:
; EPILOG-BLOCK-NEXT: %unroll_iter = sub i64 %trip, %xtraiter
; EPILOG-BLOCK-NEXT: br label %loop_header
; EPILOG-BLOCK: loop_header:
; EPILOG-BLOCK-NEXT: %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-BLOCK-NEXT: br i1 %cmp_early, label %loop_latch, label %exit1.loopexit
; EPILOG-BLOCK: loop_latch:
; EPILOG-BLOCK-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-BLOCK-NEXT: br i1 %cmp_early.1, label %loop_latch.1, label %exit1.loopexit
; EPILOG-BLOCK: exit1.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit1
; EPILOG-BLOCK: exit1:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: exit2.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: %iv.unr.ph = phi i64 [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: br label %exit2.unr-lcssa
; EPILOG-BLOCK: exit2.unr-lcssa:
; EPILOG-BLOCK-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT: br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2
; EPILOG-BLOCK: loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT: br label %loop_header.epil
; EPILOG-BLOCK: loop_header.epil:
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: %cmp_early.epil = icmp ne i64 %iv.unr, %trip2
; EPILOG-BLOCK-NEXT: br i1 %cmp_early.epil, label %loop_latch.epil, label %exit1
; EPILOG-BLOCK: loop_latch.epil:
; EPILOG-BLOCK-NEXT: br label %exit2
; EPILOG-BLOCK: exit2:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: loop_latch.1:
; EPILOG-BLOCK-NEXT: %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-BLOCK-NEXT: %niter.ncmp.1 = icmp ne i64 %niter.nsub.1, 0
; EPILOG-BLOCK-NEXT: br i1 %niter.ncmp.1, label %loop_header, label %exit2.unr-lcssa.loopexit, !llvm.loop !15
;
; PROLOG-LABEL: @test10(
; PROLOG-NEXT: entry:
; PROLOG-NEXT: %0 = add i64 %trip, -1
; PROLOG-NEXT: %xtraiter = and i64 %trip, 7
; PROLOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT: br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG: loop_header.prol.preheader:
; PROLOG-NEXT: br label %loop_header.prol
; PROLOG: loop_header.prol:
; PROLOG-NEXT: %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT: %prol.iter = phi i64 [ %xtraiter, %loop_header.prol.preheader ], [ %prol.iter.sub, %loop_latch.prol ]
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.prol = icmp ne i64 %iv.prol, %trip2
; PROLOG-NEXT: br i1 %cmp_early.prol, label %loop_latch.prol, label %exit1.loopexit1
; PROLOG: loop_latch.prol:
; PROLOG-NEXT: %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT: %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT: %prol.iter.sub = sub i64 %prol.iter, 1
; PROLOG-NEXT: %prol.iter.cmp = icmp ne i64 %prol.iter.sub, 0
; PROLOG-NEXT: br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !13
; PROLOG: loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT: br label %loop_header.prol.loopexit
; PROLOG: loop_header.prol.loopexit:
; PROLOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT: %1 = icmp ult i64 %0, 7
; PROLOG-NEXT: br i1 %1, label %exit2, label %entry.new
; PROLOG: entry.new:
; PROLOG-NEXT: br label %loop_header
; PROLOG: loop_header:
; PROLOG-NEXT: %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-NEXT: br i1 %cmp_early, label %loop_latch, label %exit1.loopexit
; PROLOG: loop_latch:
; PROLOG-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-NEXT: br i1 %cmp_early.1, label %loop_latch.1, label %exit1.loopexit
; PROLOG: exit1.loopexit:
; PROLOG-NEXT: br label %exit1
; PROLOG: exit1.loopexit1:
; PROLOG-NEXT: br label %exit1
; PROLOG: exit1:
; PROLOG-NEXT: ret void
; PROLOG: exit2.unr-lcssa:
; PROLOG-NEXT: br label %exit2
; PROLOG: exit2:
; PROLOG-NEXT: ret void
; PROLOG: loop_latch.1:
; PROLOG-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; PROLOG-NEXT: br i1 %cmp_early.2, label %loop_latch.2, label %exit1.loopexit
; PROLOG: loop_latch.2:
; PROLOG-NEXT: %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; PROLOG-NEXT: br i1 %cmp_early.3, label %loop_latch.3, label %exit1.loopexit
; PROLOG: loop_latch.3:
; PROLOG-NEXT: %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; PROLOG-NEXT: br i1 %cmp_early.4, label %loop_latch.4, label %exit1.loopexit
; PROLOG: loop_latch.4:
; PROLOG-NEXT: %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; PROLOG-NEXT: br i1 %cmp_early.5, label %loop_latch.5, label %exit1.loopexit
; PROLOG: loop_latch.5:
; PROLOG-NEXT: %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; PROLOG-NEXT: br i1 %cmp_early.6, label %loop_latch.6, label %exit1.loopexit
; PROLOG: loop_latch.6:
; PROLOG-NEXT: %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; PROLOG-NEXT: br i1 %cmp_early.7, label %loop_latch.7, label %exit1.loopexit
; PROLOG: loop_latch.7:
; PROLOG-NEXT: %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT: %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT: br i1 %cmp.7, label %loop_header, label %exit2.unr-lcssa
;
; PROLOG-BLOCK-LABEL: @test10(
; PROLOG-BLOCK-NEXT: entry:
; PROLOG-BLOCK-NEXT: %0 = add i64 %trip, -1
; PROLOG-BLOCK-NEXT: %xtraiter = and i64 %trip, 1
; PROLOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT: br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK: loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT: br label %loop_header.prol
; PROLOG-BLOCK: loop_header.prol:
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: %cmp_early.prol = icmp ne i64 0, %trip2
; PROLOG-BLOCK-NEXT: br i1 %cmp_early.prol, label %loop_latch.prol, label %exit1
; PROLOG-BLOCK: loop_latch.prol:
; PROLOG-BLOCK-NEXT: br label %loop_header.prol.loopexit
; PROLOG-BLOCK: loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; PROLOG-BLOCK-NEXT: br i1 %1, label %exit2, label %entry.new
; PROLOG-BLOCK: entry.new:
; PROLOG-BLOCK-NEXT: br label %loop_header
; PROLOG-BLOCK: loop_header:
; PROLOG-BLOCK-NEXT: %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-BLOCK-NEXT: br i1 %cmp_early, label %loop_latch, label %exit1.loopexit
; PROLOG-BLOCK: loop_latch:
; PROLOG-BLOCK-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-BLOCK-NEXT: br i1 %cmp_early.1, label %loop_latch.1, label %exit1.loopexit
; PROLOG-BLOCK: exit1.loopexit:
; PROLOG-BLOCK-NEXT: br label %exit1
; PROLOG-BLOCK: exit1:
; PROLOG-BLOCK-NEXT: ret void
; PROLOG-BLOCK: exit2.unr-lcssa:
; PROLOG-BLOCK-NEXT: br label %exit2
; PROLOG-BLOCK: exit2:
; PROLOG-BLOCK-NEXT: ret void
; PROLOG-BLOCK: loop_latch.1:
; PROLOG-BLOCK-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT: %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT: br i1 %cmp.1, label %loop_header, label %exit2.unr-lcssa, !llvm.loop !15
;
entry:
br label %loop_header

loop_header:
%iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
call void @bar()
%cmp_early = icmp ne i64 %iv, %trip2
br i1 %cmp_early, label %loop_latch, label %exit1

loop_latch:
%iv_next = add i64 %iv, 1
%cmp = icmp ne i64 %iv_next, %trip
br i1 %cmp, label %loop_header, label %exit2

exit1:
ret void

exit2:
ret void
}

; With a loop invariant, we can eliminate the last N-1
; copies of the exit test in the unrolled main loop body.
define void @test11(i64 %trip, i1 %cond) {
; EPILOG-LABEL: @test11(
; EPILOG-NEXT: entry:
; EPILOG-NEXT: %0 = add i64 %trip, -1
; EPILOG-NEXT: %xtraiter = and i64 %trip, 7
; EPILOG-NEXT: %1 = icmp ult i64 %0, 7
; EPILOG-NEXT: br i1 %1, label %exit2.unr-lcssa, label %entry.new
; EPILOG: entry.new:
; EPILOG-NEXT: %unroll_iter = sub i64 %trip, %xtraiter
; EPILOG-NEXT: br label %loop_header
; EPILOG: loop_header:
; EPILOG-NEXT: %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.7, %loop_latch.7 ]
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_latch, label %exit1.loopexit
; EPILOG: loop_latch:
; EPILOG-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_latch.1, label %exit1.loopexit
; EPILOG: exit1.loopexit:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1.loopexit1:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1:
; EPILOG-NEXT: ret void
; EPILOG: exit2.unr-lcssa.loopexit:
; EPILOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: br label %exit2.unr-lcssa
; EPILOG: exit2.unr-lcssa:
; EPILOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.unr-lcssa.loopexit ]
; EPILOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT: br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2
; EPILOG: loop_header.epil.preheader:
; EPILOG-NEXT: br label %loop_header.epil
; EPILOG: loop_header.epil:
; EPILOG-NEXT: %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT: %epil.iter = phi i64 [ %xtraiter, %loop_header.epil.preheader ], [ %epil.iter.sub, %loop_latch.epil ]
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_latch.epil, label %exit1.loopexit1
; EPILOG: loop_latch.epil:
; EPILOG-NEXT: %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT: %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT: %epil.iter.sub = sub i64 %epil.iter, 1
; EPILOG-NEXT: %epil.iter.cmp = icmp ne i64 %epil.iter.sub, 0
; EPILOG-NEXT: br i1 %epil.iter.cmp, label %loop_header.epil, label %exit2.epilog-lcssa, !llvm.loop !14
; EPILOG: exit2.epilog-lcssa:
; EPILOG-NEXT: br label %exit2
; EPILOG: exit2:
; EPILOG-NEXT: ret void
; EPILOG: loop_latch.1:
; EPILOG-NEXT: %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_latch.2, label %exit1.loopexit
; EPILOG: loop_latch.2:
; EPILOG-NEXT: %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT: %niter.nsub.2 = sub i64 %niter.nsub.1, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_latch.3, label %exit1.loopexit
; EPILOG: loop_latch.3:
; EPILOG-NEXT: %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT: %niter.nsub.3 = sub i64 %niter.nsub.2, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_latch.4, label %exit1.loopexit
; EPILOG: loop_latch.4:
; EPILOG-NEXT: %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT: %niter.nsub.4 = sub i64 %niter.nsub.3, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_latch.5, label %exit1.loopexit
; EPILOG: loop_latch.5:
; EPILOG-NEXT: %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT: %niter.nsub.5 = sub i64 %niter.nsub.4, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_latch.6, label %exit1.loopexit
; EPILOG: loop_latch.6:
; EPILOG-NEXT: %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT: %niter.nsub.6 = sub i64 %niter.nsub.5, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_latch.7, label %exit1.loopexit
; EPILOG: loop_latch.7:
; EPILOG-NEXT: %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT: %niter.nsub.7 = sub i64 %niter.nsub.6, 1
; EPILOG-NEXT: %niter.ncmp.7 = icmp ne i64 %niter.nsub.7, 0
; EPILOG-NEXT: br i1 %niter.ncmp.7, label %loop_header, label %exit2.unr-lcssa.loopexit
;
; EPILOG-BLOCK-LABEL: @test11(
; EPILOG-BLOCK-NEXT: entry:
; EPILOG-BLOCK-NEXT: %0 = add i64 %trip, -1
; EPILOG-BLOCK-NEXT: %xtraiter = and i64 %trip, 1
; EPILOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; EPILOG-BLOCK-NEXT: br i1 %1, label %exit2.unr-lcssa, label %entry.new
; EPILOG-BLOCK: entry.new:
; EPILOG-BLOCK-NEXT: %unroll_iter = sub i64 %trip, %xtraiter
; EPILOG-BLOCK-NEXT: br label %loop_header
; EPILOG-BLOCK: loop_header:
; EPILOG-BLOCK-NEXT: %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: br i1 %cond, label %loop_latch, label %exit1.loopexit
; EPILOG-BLOCK: loop_latch:
; EPILOG-BLOCK-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: br i1 %cond, label %loop_latch.1, label %exit1.loopexit
; EPILOG-BLOCK: exit1.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit1
; EPILOG-BLOCK: exit1:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: exit2.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit2.unr-lcssa
; EPILOG-BLOCK: exit2.unr-lcssa:
; EPILOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT: br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2
; EPILOG-BLOCK: loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT: br label %loop_header.epil
; EPILOG-BLOCK: loop_header.epil:
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: br i1 %cond, label %loop_latch.epil, label %exit1
; EPILOG-BLOCK: loop_latch.epil:
; EPILOG-BLOCK-NEXT: br label %exit2
; EPILOG-BLOCK: exit2:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: loop_latch.1:
; EPILOG-BLOCK-NEXT: %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-BLOCK-NEXT: %niter.ncmp.1 = icmp ne i64 %niter.nsub.1, 0
; EPILOG-BLOCK-NEXT: br i1 %niter.ncmp.1, label %loop_header, label %exit2.unr-lcssa.loopexit, !llvm.loop !16
;
; PROLOG-LABEL: @test11(
; PROLOG-NEXT: entry:
; PROLOG-NEXT: %0 = add i64 %trip, -1
; PROLOG-NEXT: %xtraiter = and i64 %trip, 7
; PROLOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT: br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG: loop_header.prol.preheader:
; PROLOG-NEXT: br label %loop_header.prol
; PROLOG: loop_header.prol:
; PROLOG-NEXT: %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT: %prol.iter = phi i64 [ %xtraiter, %loop_header.prol.preheader ], [ %prol.iter.sub, %loop_latch.prol ]
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_latch.prol, label %exit1.loopexit1
; PROLOG: loop_latch.prol:
; PROLOG-NEXT: %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT: %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT: %prol.iter.sub = sub i64 %prol.iter, 1
; PROLOG-NEXT: %prol.iter.cmp = icmp ne i64 %prol.iter.sub, 0
; PROLOG-NEXT: br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !14
; PROLOG: loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT: br label %loop_header.prol.loopexit
; PROLOG: loop_header.prol.loopexit:
; PROLOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT: %1 = icmp ult i64 %0, 7
; PROLOG-NEXT: br i1 %1, label %exit2, label %entry.new
; PROLOG: entry.new:
; PROLOG-NEXT: br label %loop_header
; PROLOG: loop_header:
; PROLOG-NEXT: %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_latch, label %exit1.loopexit
; PROLOG: loop_latch:
; PROLOG-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_latch.1, label %exit1.loopexit
; PROLOG: exit1.loopexit:
; PROLOG-NEXT: br label %exit1
; PROLOG: exit1.loopexit1:
; PROLOG-NEXT: br label %exit1
; PROLOG: exit1:
; PROLOG-NEXT: ret void
; PROLOG: exit2.unr-lcssa:
; PROLOG-NEXT: br label %exit2
; PROLOG: exit2:
; PROLOG-NEXT: ret void
; PROLOG: loop_latch.1:
; PROLOG-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_latch.2, label %exit1.loopexit
; PROLOG: loop_latch.2:
; PROLOG-NEXT: %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_latch.3, label %exit1.loopexit
; PROLOG: loop_latch.3:
; PROLOG-NEXT: %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_latch.4, label %exit1.loopexit
; PROLOG: loop_latch.4:
; PROLOG-NEXT: %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_latch.5, label %exit1.loopexit
; PROLOG: loop_latch.5:
; PROLOG-NEXT: %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_latch.6, label %exit1.loopexit
; PROLOG: loop_latch.6:
; PROLOG-NEXT: %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_latch.7, label %exit1.loopexit
; PROLOG: loop_latch.7:
; PROLOG-NEXT: %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT: %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT: br i1 %cmp.7, label %loop_header, label %exit2.unr-lcssa
;
; PROLOG-BLOCK-LABEL: @test11(
; PROLOG-BLOCK-NEXT: entry:
; PROLOG-BLOCK-NEXT: %0 = add i64 %trip, -1
; PROLOG-BLOCK-NEXT: %xtraiter = and i64 %trip, 1
; PROLOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT: br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK: loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT: br label %loop_header.prol
; PROLOG-BLOCK: loop_header.prol:
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: br i1 %cond, label %loop_latch.prol, label %exit1
; PROLOG-BLOCK: loop_latch.prol:
; PROLOG-BLOCK-NEXT: br label %loop_header.prol.loopexit
; PROLOG-BLOCK: loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; PROLOG-BLOCK-NEXT: br i1 %1, label %exit2, label %entry.new
; PROLOG-BLOCK: entry.new:
; PROLOG-BLOCK-NEXT: br label %loop_header
; PROLOG-BLOCK: loop_header:
; PROLOG-BLOCK-NEXT: %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: br i1 %cond, label %loop_latch, label %exit1.loopexit
; PROLOG-BLOCK: loop_latch:
; PROLOG-BLOCK-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: br i1 %cond, label %loop_latch.1, label %exit1.loopexit
; PROLOG-BLOCK: exit1.loopexit:
; PROLOG-BLOCK-NEXT: br label %exit1
; PROLOG-BLOCK: exit1:
; PROLOG-BLOCK-NEXT: ret void
; PROLOG-BLOCK: exit2.unr-lcssa:
; PROLOG-BLOCK-NEXT: br label %exit2
; PROLOG-BLOCK: exit2:
; PROLOG-BLOCK-NEXT: ret void
; PROLOG-BLOCK: loop_latch.1:
; PROLOG-BLOCK-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT: %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT: br i1 %cmp.1, label %loop_header, label %exit2.unr-lcssa, !llvm.loop !16
;
entry:
br label %loop_header

loop_header:
%iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
call void @bar()
br i1 %cond, label %loop_latch, label %exit1

loop_latch:
%iv_next = add i64 %iv, 1
%cmp = icmp ne i64 %iv_next, %trip
br i1 %cmp, label %loop_header, label %exit2

exit1:
ret void

exit2:
ret void
}

; Combine a computeable and invariant test to make sure
; the interaction of both doesn't do anything weird
define void @test12(i64 %trip, i64 %trip2, i1 %cond) {
; EPILOG-LABEL: @test12(
; EPILOG-NEXT: entry:
; EPILOG-NEXT: %0 = add i64 %trip, -1
; EPILOG-NEXT: %xtraiter = and i64 %trip, 7
; EPILOG-NEXT: %1 = icmp ult i64 %0, 7
; EPILOG-NEXT: br i1 %1, label %exit1.unr-lcssa, label %entry.new
; EPILOG: entry.new:
; EPILOG-NEXT: %unroll_iter = sub i64 %trip, %xtraiter
; EPILOG-NEXT: br label %loop_header
; EPILOG: loop_header:
; EPILOG-NEXT: %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.7, %loop_latch.7 ]
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-NEXT: br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2:
; EPILOG-NEXT: br i1 %cond, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch:
; EPILOG-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-NEXT: br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG: exit1.unr-lcssa.loopexit:
; EPILOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: br label %exit1.unr-lcssa
; EPILOG: exit1.unr-lcssa:
; EPILOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit1.unr-lcssa.loopexit ]
; EPILOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT: br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG: loop_header.epil.preheader:
; EPILOG-NEXT: br label %loop_header.epil
; EPILOG: loop_header.epil:
; EPILOG-NEXT: %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT: %epil.iter = phi i64 [ %xtraiter, %loop_header.epil.preheader ], [ %epil.iter.sub, %loop_latch.epil ]
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.epil = icmp ne i64 %iv.epil, %trip2
; EPILOG-NEXT: br i1 %cmp_early.epil, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG: loop_exiting_bb2.epil:
; EPILOG-NEXT: br i1 %cond, label %loop_latch.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG: loop_latch.epil:
; EPILOG-NEXT: %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT: %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT: %epil.iter.sub = sub i64 %epil.iter, 1
; EPILOG-NEXT: %epil.iter.cmp = icmp ne i64 %epil.iter.sub, 0
; EPILOG-NEXT: br i1 %epil.iter.cmp, label %loop_header.epil, label %exit1.epilog-lcssa.loopexit1, !llvm.loop !15
; EPILOG: exit1.epilog-lcssa.loopexit:
; EPILOG-NEXT: br label %exit1.epilog-lcssa
; EPILOG: exit1.epilog-lcssa.loopexit1:
; EPILOG-NEXT: br label %exit1.epilog-lcssa
; EPILOG: exit1.epilog-lcssa:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1:
; EPILOG-NEXT: ret void
; EPILOG: loop_exiting_bb2.1:
; EPILOG-NEXT: br i1 %cond, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.1:
; EPILOG-NEXT: %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; EPILOG-NEXT: br i1 %cmp_early.2, label %loop_exiting_bb2.2, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.2:
; EPILOG-NEXT: br i1 %cond, label %loop_latch.2, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.2:
; EPILOG-NEXT: %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT: %niter.nsub.2 = sub i64 %niter.nsub.1, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; EPILOG-NEXT: br i1 %cmp_early.3, label %loop_exiting_bb2.3, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.3:
; EPILOG-NEXT: br i1 %cond, label %loop_latch.3, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.3:
; EPILOG-NEXT: %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT: %niter.nsub.3 = sub i64 %niter.nsub.2, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; EPILOG-NEXT: br i1 %cmp_early.4, label %loop_exiting_bb2.4, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.4:
; EPILOG-NEXT: br i1 %cond, label %loop_latch.4, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.4:
; EPILOG-NEXT: %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT: %niter.nsub.4 = sub i64 %niter.nsub.3, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; EPILOG-NEXT: br i1 %cmp_early.5, label %loop_exiting_bb2.5, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.5:
; EPILOG-NEXT: br i1 %cond, label %loop_latch.5, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.5:
; EPILOG-NEXT: %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT: %niter.nsub.5 = sub i64 %niter.nsub.4, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; EPILOG-NEXT: br i1 %cmp_early.6, label %loop_exiting_bb2.6, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.6:
; EPILOG-NEXT: br i1 %cond, label %loop_latch.6, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.6:
; EPILOG-NEXT: %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT: %niter.nsub.6 = sub i64 %niter.nsub.5, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; EPILOG-NEXT: br i1 %cmp_early.7, label %loop_exiting_bb2.7, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.7:
; EPILOG-NEXT: br i1 %cond, label %loop_latch.7, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.7:
; EPILOG-NEXT: %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT: %niter.nsub.7 = sub i64 %niter.nsub.6, 1
; EPILOG-NEXT: %niter.ncmp.7 = icmp ne i64 %niter.nsub.7, 0
; EPILOG-NEXT: br i1 %niter.ncmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
;
; EPILOG-BLOCK-LABEL: @test12(
; EPILOG-BLOCK-NEXT: entry:
; EPILOG-BLOCK-NEXT: %0 = add i64 %trip, -1
; EPILOG-BLOCK-NEXT: %xtraiter = and i64 %trip, 1
; EPILOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; EPILOG-BLOCK-NEXT: br i1 %1, label %exit1.unr-lcssa, label %entry.new
; EPILOG-BLOCK: entry.new:
; EPILOG-BLOCK-NEXT: %unroll_iter = sub i64 %trip, %xtraiter
; EPILOG-BLOCK-NEXT: br label %loop_header
; EPILOG-BLOCK: loop_header:
; EPILOG-BLOCK-NEXT: %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-BLOCK-NEXT: br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: loop_exiting_bb2:
; EPILOG-BLOCK-NEXT: br i1 %cond, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: loop_latch:
; EPILOG-BLOCK-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-BLOCK-NEXT: br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: exit1.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: %iv.unr.ph = phi i64 [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: br label %exit1.unr-lcssa
; EPILOG-BLOCK: exit1.unr-lcssa:
; EPILOG-BLOCK-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit1.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT: br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG-BLOCK: loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT: br label %loop_header.epil
; EPILOG-BLOCK: loop_header.epil:
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: %cmp_early.epil = icmp ne i64 %iv.unr, %trip2
; EPILOG-BLOCK-NEXT: br i1 %cmp_early.epil, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK: loop_exiting_bb2.epil:
; EPILOG-BLOCK-NEXT: br i1 %cond, label %loop_latch.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK: loop_latch.epil:
; EPILOG-BLOCK-NEXT: br label %exit1.epilog-lcssa
; EPILOG-BLOCK: exit1.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit1.epilog-lcssa
; EPILOG-BLOCK: exit1.epilog-lcssa:
; EPILOG-BLOCK-NEXT: br label %exit1
; EPILOG-BLOCK: exit1:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: loop_exiting_bb2.1:
; EPILOG-BLOCK-NEXT: br i1 %cond, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: loop_latch.1:
; EPILOG-BLOCK-NEXT: %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-BLOCK-NEXT: %niter.ncmp.1 = icmp ne i64 %niter.nsub.1, 0
; EPILOG-BLOCK-NEXT: br i1 %niter.ncmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !17
;
; PROLOG-LABEL: @test12(
; PROLOG-NEXT: entry:
; PROLOG-NEXT: %0 = add i64 %trip, -1
; PROLOG-NEXT: %xtraiter = and i64 %trip, 7
; PROLOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT: br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG: loop_header.prol.preheader:
; PROLOG-NEXT: br label %loop_header.prol
; PROLOG: loop_header.prol:
; PROLOG-NEXT: %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT: %prol.iter = phi i64 [ %xtraiter, %loop_header.prol.preheader ], [ %prol.iter.sub, %loop_latch.prol ]
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.prol = icmp ne i64 %iv.prol, %trip2
; PROLOG-NEXT: br i1 %cmp_early.prol, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG: loop_exiting_bb2.prol:
; PROLOG-NEXT: br i1 %cond, label %loop_latch.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG: loop_latch.prol:
; PROLOG-NEXT: %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT: %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT: %prol.iter.sub = sub i64 %prol.iter, 1
; PROLOG-NEXT: %prol.iter.cmp = icmp ne i64 %prol.iter.sub, 0
; PROLOG-NEXT: br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !15
; PROLOG: loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT: br label %loop_header.prol.loopexit
; PROLOG: loop_header.prol.loopexit:
; PROLOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT: %1 = icmp ult i64 %0, 7
; PROLOG-NEXT: br i1 %1, label %exit1, label %entry.new
; PROLOG: entry.new:
; PROLOG-NEXT: br label %loop_header
; PROLOG: loop_header:
; PROLOG-NEXT: %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-NEXT: br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2:
; PROLOG-NEXT: br i1 %cond, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch:
; PROLOG-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-NEXT: br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG: exit1.unr-lcssa.loopexit:
; PROLOG-NEXT: br label %exit1.unr-lcssa
; PROLOG: exit1.unr-lcssa.loopexit1:
; PROLOG-NEXT: br label %exit1.unr-lcssa
; PROLOG: exit1.unr-lcssa:
; PROLOG-NEXT: br label %exit1
; PROLOG: exit1:
; PROLOG-NEXT: ret void
; PROLOG: loop_exiting_bb2.1:
; PROLOG-NEXT: br i1 %cond, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.1:
; PROLOG-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; PROLOG-NEXT: br i1 %cmp_early.2, label %loop_exiting_bb2.2, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.2:
; PROLOG-NEXT: br i1 %cond, label %loop_latch.2, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.2:
; PROLOG-NEXT: %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; PROLOG-NEXT: br i1 %cmp_early.3, label %loop_exiting_bb2.3, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.3:
; PROLOG-NEXT: br i1 %cond, label %loop_latch.3, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.3:
; PROLOG-NEXT: %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; PROLOG-NEXT: br i1 %cmp_early.4, label %loop_exiting_bb2.4, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.4:
; PROLOG-NEXT: br i1 %cond, label %loop_latch.4, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.4:
; PROLOG-NEXT: %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; PROLOG-NEXT: br i1 %cmp_early.5, label %loop_exiting_bb2.5, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.5:
; PROLOG-NEXT: br i1 %cond, label %loop_latch.5, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.5:
; PROLOG-NEXT: %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; PROLOG-NEXT: br i1 %cmp_early.6, label %loop_exiting_bb2.6, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.6:
; PROLOG-NEXT: br i1 %cond, label %loop_latch.6, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.6:
; PROLOG-NEXT: %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; PROLOG-NEXT: br i1 %cmp_early.7, label %loop_exiting_bb2.7, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.7:
; PROLOG-NEXT: br i1 %cond, label %loop_latch.7, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.7:
; PROLOG-NEXT: %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT: %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT: br i1 %cmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
;
; PROLOG-BLOCK-LABEL: @test12(
; PROLOG-BLOCK-NEXT: entry:
; PROLOG-BLOCK-NEXT: %0 = add i64 %trip, -1
; PROLOG-BLOCK-NEXT: %xtraiter = and i64 %trip, 1
; PROLOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT: br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK: loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT: br label %loop_header.prol
; PROLOG-BLOCK: loop_header.prol:
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: %cmp_early.prol = icmp ne i64 0, %trip2
; PROLOG-BLOCK-NEXT: br i1 %cmp_early.prol, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK: loop_exiting_bb2.prol:
; PROLOG-BLOCK-NEXT: br i1 %cond, label %loop_latch.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK: loop_latch.prol:
; PROLOG-BLOCK-NEXT: br label %loop_header.prol.loopexit
; PROLOG-BLOCK: loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; PROLOG-BLOCK-NEXT: br i1 %1, label %exit1, label %entry.new
; PROLOG-BLOCK: entry.new:
; PROLOG-BLOCK-NEXT: br label %loop_header
; PROLOG-BLOCK: loop_header:
; PROLOG-BLOCK-NEXT: %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-BLOCK-NEXT: br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: loop_exiting_bb2:
; PROLOG-BLOCK-NEXT: br i1 %cond, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: loop_latch:
; PROLOG-BLOCK-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-BLOCK-NEXT: br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: exit1.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT: br label %exit1.unr-lcssa
; PROLOG-BLOCK: exit1.unr-lcssa:
; PROLOG-BLOCK-NEXT: br label %exit1
; PROLOG-BLOCK: exit1:
; PROLOG-BLOCK-NEXT: ret void
; PROLOG-BLOCK: loop_exiting_bb2.1:
; PROLOG-BLOCK-NEXT: br i1 %cond, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: loop_latch.1:
; PROLOG-BLOCK-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT: %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT: br i1 %cmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !17
;
entry:
br label %loop_header

loop_header:
%iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
call void @bar()
%cmp_early = icmp ne i64 %iv, %trip2
br i1 %cmp_early, label %loop_exiting_bb2, label %exit1

loop_exiting_bb2:
br i1 %cond, label %loop_latch, label %exit1

loop_latch:
%iv_next = add i64 %iv, 1
%cmp = icmp ne i64 %iv_next, %trip
br i1 %cmp, label %loop_header, label %exit1

exit1:
ret void
}

declare i1 @unknown_cond()

; Mix of computable and uncompatable exits
define void @test13(i64 %trip, i64 %trip2) {
; EPILOG-LABEL: @test13(
; EPILOG-NEXT: entry:
; EPILOG-NEXT: %0 = add i64 %trip, -1
; EPILOG-NEXT: %xtraiter = and i64 %trip, 7
; EPILOG-NEXT: %1 = icmp ult i64 %0, 7
; EPILOG-NEXT: br i1 %1, label %exit1.unr-lcssa, label %entry.new
; EPILOG: entry.new:
; EPILOG-NEXT: %unroll_iter = sub i64 %trip, %xtraiter
; EPILOG-NEXT: br label %loop_header
; EPILOG: loop_header:
; EPILOG-NEXT: %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.7, %loop_latch.7 ]
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-NEXT: br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2:
; EPILOG-NEXT: %unknown = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch:
; EPILOG-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-NEXT: br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG: exit1.unr-lcssa.loopexit:
; EPILOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: br label %exit1.unr-lcssa
; EPILOG: exit1.unr-lcssa:
; EPILOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit1.unr-lcssa.loopexit ]
; EPILOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT: br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG: loop_header.epil.preheader:
; EPILOG-NEXT: br label %loop_header.epil
; EPILOG: loop_header.epil:
; EPILOG-NEXT: %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT: %epil.iter = phi i64 [ %xtraiter, %loop_header.epil.preheader ], [ %epil.iter.sub, %loop_latch.epil ]
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.epil = icmp ne i64 %iv.epil, %trip2
; EPILOG-NEXT: br i1 %cmp_early.epil, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG: loop_exiting_bb2.epil:
; EPILOG-NEXT: %unknown.epil = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.epil, label %loop_latch.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG: loop_latch.epil:
; EPILOG-NEXT: %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT: %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT: %epil.iter.sub = sub i64 %epil.iter, 1
; EPILOG-NEXT: %epil.iter.cmp = icmp ne i64 %epil.iter.sub, 0
; EPILOG-NEXT: br i1 %epil.iter.cmp, label %loop_header.epil, label %exit1.epilog-lcssa.loopexit1, !llvm.loop !16
; EPILOG: exit1.epilog-lcssa.loopexit:
; EPILOG-NEXT: br label %exit1.epilog-lcssa
; EPILOG: exit1.epilog-lcssa.loopexit1:
; EPILOG-NEXT: br label %exit1.epilog-lcssa
; EPILOG: exit1.epilog-lcssa:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1:
; EPILOG-NEXT: ret void
; EPILOG: loop_exiting_bb2.1:
; EPILOG-NEXT: %unknown.1 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.1, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.1:
; EPILOG-NEXT: %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; EPILOG-NEXT: br i1 %cmp_early.2, label %loop_exiting_bb2.2, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.2:
; EPILOG-NEXT: %unknown.2 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.2, label %loop_latch.2, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.2:
; EPILOG-NEXT: %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT: %niter.nsub.2 = sub i64 %niter.nsub.1, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; EPILOG-NEXT: br i1 %cmp_early.3, label %loop_exiting_bb2.3, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.3:
; EPILOG-NEXT: %unknown.3 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.3, label %loop_latch.3, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.3:
; EPILOG-NEXT: %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT: %niter.nsub.3 = sub i64 %niter.nsub.2, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; EPILOG-NEXT: br i1 %cmp_early.4, label %loop_exiting_bb2.4, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.4:
; EPILOG-NEXT: %unknown.4 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.4, label %loop_latch.4, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.4:
; EPILOG-NEXT: %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT: %niter.nsub.4 = sub i64 %niter.nsub.3, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; EPILOG-NEXT: br i1 %cmp_early.5, label %loop_exiting_bb2.5, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.5:
; EPILOG-NEXT: %unknown.5 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.5, label %loop_latch.5, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.5:
; EPILOG-NEXT: %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT: %niter.nsub.5 = sub i64 %niter.nsub.4, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; EPILOG-NEXT: br i1 %cmp_early.6, label %loop_exiting_bb2.6, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.6:
; EPILOG-NEXT: %unknown.6 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.6, label %loop_latch.6, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.6:
; EPILOG-NEXT: %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT: %niter.nsub.6 = sub i64 %niter.nsub.5, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; EPILOG-NEXT: br i1 %cmp_early.7, label %loop_exiting_bb2.7, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.7:
; EPILOG-NEXT: %unknown.7 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.7, label %loop_latch.7, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.7:
; EPILOG-NEXT: %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT: %niter.nsub.7 = sub i64 %niter.nsub.6, 1
; EPILOG-NEXT: %niter.ncmp.7 = icmp ne i64 %niter.nsub.7, 0
; EPILOG-NEXT: br i1 %niter.ncmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
;
; EPILOG-BLOCK-LABEL: @test13(
; EPILOG-BLOCK-NEXT: entry:
; EPILOG-BLOCK-NEXT: %0 = add i64 %trip, -1
; EPILOG-BLOCK-NEXT: %xtraiter = and i64 %trip, 1
; EPILOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; EPILOG-BLOCK-NEXT: br i1 %1, label %exit1.unr-lcssa, label %entry.new
; EPILOG-BLOCK: entry.new:
; EPILOG-BLOCK-NEXT: %unroll_iter = sub i64 %trip, %xtraiter
; EPILOG-BLOCK-NEXT: br label %loop_header
; EPILOG-BLOCK: loop_header:
; EPILOG-BLOCK-NEXT: %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; EPILOG-BLOCK-NEXT: br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: loop_exiting_bb2:
; EPILOG-BLOCK-NEXT: %unknown = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT: br i1 %unknown, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: loop_latch:
; EPILOG-BLOCK-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; EPILOG-BLOCK-NEXT: br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: exit1.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: %iv.unr.ph = phi i64 [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: br label %exit1.unr-lcssa
; EPILOG-BLOCK: exit1.unr-lcssa:
; EPILOG-BLOCK-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit1.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT: br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG-BLOCK: loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT: br label %loop_header.epil
; EPILOG-BLOCK: loop_header.epil:
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: %cmp_early.epil = icmp ne i64 %iv.unr, %trip2
; EPILOG-BLOCK-NEXT: br i1 %cmp_early.epil, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK: loop_exiting_bb2.epil:
; EPILOG-BLOCK-NEXT: %unknown.epil = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT: br i1 %unknown.epil, label %loop_latch.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK: loop_latch.epil:
; EPILOG-BLOCK-NEXT: br label %exit1.epilog-lcssa
; EPILOG-BLOCK: exit1.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit1.epilog-lcssa
; EPILOG-BLOCK: exit1.epilog-lcssa:
; EPILOG-BLOCK-NEXT: br label %exit1
; EPILOG-BLOCK: exit1:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: loop_exiting_bb2.1:
; EPILOG-BLOCK-NEXT: %unknown.1 = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT: br i1 %unknown.1, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: loop_latch.1:
; EPILOG-BLOCK-NEXT: %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-BLOCK-NEXT: %niter.ncmp.1 = icmp ne i64 %niter.nsub.1, 0
; EPILOG-BLOCK-NEXT: br i1 %niter.ncmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !18
;
; PROLOG-LABEL: @test13(
; PROLOG-NEXT: entry:
; PROLOG-NEXT: %0 = add i64 %trip, -1
; PROLOG-NEXT: %xtraiter = and i64 %trip, 7
; PROLOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT: br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG: loop_header.prol.preheader:
; PROLOG-NEXT: br label %loop_header.prol
; PROLOG: loop_header.prol:
; PROLOG-NEXT: %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT: %prol.iter = phi i64 [ %xtraiter, %loop_header.prol.preheader ], [ %prol.iter.sub, %loop_latch.prol ]
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.prol = icmp ne i64 %iv.prol, %trip2
; PROLOG-NEXT: br i1 %cmp_early.prol, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG: loop_exiting_bb2.prol:
; PROLOG-NEXT: %unknown.prol = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.prol, label %loop_latch.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG: loop_latch.prol:
; PROLOG-NEXT: %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT: %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT: %prol.iter.sub = sub i64 %prol.iter, 1
; PROLOG-NEXT: %prol.iter.cmp = icmp ne i64 %prol.iter.sub, 0
; PROLOG-NEXT: br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !16
; PROLOG: loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT: br label %loop_header.prol.loopexit
; PROLOG: loop_header.prol.loopexit:
; PROLOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT: %1 = icmp ult i64 %0, 7
; PROLOG-NEXT: br i1 %1, label %exit1, label %entry.new
; PROLOG: entry.new:
; PROLOG-NEXT: br label %loop_header
; PROLOG: loop_header:
; PROLOG-NEXT: %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-NEXT: br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2:
; PROLOG-NEXT: %unknown = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch:
; PROLOG-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-NEXT: br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG: exit1.unr-lcssa.loopexit:
; PROLOG-NEXT: br label %exit1.unr-lcssa
; PROLOG: exit1.unr-lcssa.loopexit1:
; PROLOG-NEXT: br label %exit1.unr-lcssa
; PROLOG: exit1.unr-lcssa:
; PROLOG-NEXT: br label %exit1
; PROLOG: exit1:
; PROLOG-NEXT: ret void
; PROLOG: loop_exiting_bb2.1:
; PROLOG-NEXT: %unknown.1 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.1, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.1:
; PROLOG-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.2 = icmp ne i64 %iv_next.1, %trip2
; PROLOG-NEXT: br i1 %cmp_early.2, label %loop_exiting_bb2.2, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.2:
; PROLOG-NEXT: %unknown.2 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.2, label %loop_latch.2, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.2:
; PROLOG-NEXT: %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.3 = icmp ne i64 %iv_next.2, %trip2
; PROLOG-NEXT: br i1 %cmp_early.3, label %loop_exiting_bb2.3, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.3:
; PROLOG-NEXT: %unknown.3 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.3, label %loop_latch.3, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.3:
; PROLOG-NEXT: %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.4 = icmp ne i64 %iv_next.3, %trip2
; PROLOG-NEXT: br i1 %cmp_early.4, label %loop_exiting_bb2.4, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.4:
; PROLOG-NEXT: %unknown.4 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.4, label %loop_latch.4, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.4:
; PROLOG-NEXT: %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.5 = icmp ne i64 %iv_next.4, %trip2
; PROLOG-NEXT: br i1 %cmp_early.5, label %loop_exiting_bb2.5, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.5:
; PROLOG-NEXT: %unknown.5 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.5, label %loop_latch.5, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.5:
; PROLOG-NEXT: %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.6 = icmp ne i64 %iv_next.5, %trip2
; PROLOG-NEXT: br i1 %cmp_early.6, label %loop_exiting_bb2.6, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.6:
; PROLOG-NEXT: %unknown.6 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.6, label %loop_latch.6, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.6:
; PROLOG-NEXT: %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: %cmp_early.7 = icmp ne i64 %iv_next.6, %trip2
; PROLOG-NEXT: br i1 %cmp_early.7, label %loop_exiting_bb2.7, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.7:
; PROLOG-NEXT: %unknown.7 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.7, label %loop_latch.7, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.7:
; PROLOG-NEXT: %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT: %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT: br i1 %cmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
;
; PROLOG-BLOCK-LABEL: @test13(
; PROLOG-BLOCK-NEXT: entry:
; PROLOG-BLOCK-NEXT: %0 = add i64 %trip, -1
; PROLOG-BLOCK-NEXT: %xtraiter = and i64 %trip, 1
; PROLOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT: br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK: loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT: br label %loop_header.prol
; PROLOG-BLOCK: loop_header.prol:
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: %cmp_early.prol = icmp ne i64 0, %trip2
; PROLOG-BLOCK-NEXT: br i1 %cmp_early.prol, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK: loop_exiting_bb2.prol:
; PROLOG-BLOCK-NEXT: %unknown.prol = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT: br i1 %unknown.prol, label %loop_latch.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK: loop_latch.prol:
; PROLOG-BLOCK-NEXT: br label %loop_header.prol.loopexit
; PROLOG-BLOCK: loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; PROLOG-BLOCK-NEXT: br i1 %1, label %exit1, label %entry.new
; PROLOG-BLOCK: entry.new:
; PROLOG-BLOCK-NEXT: br label %loop_header
; PROLOG-BLOCK: loop_header:
; PROLOG-BLOCK-NEXT: %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: %cmp_early = icmp ne i64 %iv, %trip2
; PROLOG-BLOCK-NEXT: br i1 %cmp_early, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: loop_exiting_bb2:
; PROLOG-BLOCK-NEXT: %unknown = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT: br i1 %unknown, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: loop_latch:
; PROLOG-BLOCK-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: %cmp_early.1 = icmp ne i64 %iv_next, %trip2
; PROLOG-BLOCK-NEXT: br i1 %cmp_early.1, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: exit1.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT: br label %exit1.unr-lcssa
; PROLOG-BLOCK: exit1.unr-lcssa:
; PROLOG-BLOCK-NEXT: br label %exit1
; PROLOG-BLOCK: exit1:
; PROLOG-BLOCK-NEXT: ret void
; PROLOG-BLOCK: loop_exiting_bb2.1:
; PROLOG-BLOCK-NEXT: %unknown.1 = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT: br i1 %unknown.1, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: loop_latch.1:
; PROLOG-BLOCK-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT: %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT: br i1 %cmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !18
;
entry:
br label %loop_header

loop_header:
%iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
call void @bar()
%cmp_early = icmp ne i64 %iv, %trip2
br i1 %cmp_early, label %loop_exiting_bb2, label %exit1

loop_exiting_bb2:
%unknown = call i1 @unknown_cond()
br i1 %unknown, label %loop_latch, label %exit1

loop_latch:
%iv_next = add i64 %iv, 1
%cmp = icmp ne i64 %iv_next, %trip
br i1 %cmp, label %loop_header, label %exit1

exit1:
ret void
}

; Mix of invariant and (even in theory) uncomputable exits
define void @test14(i64 %trip, i1 %cond) {
; EPILOG-LABEL: @test14(
; EPILOG-NEXT: entry:
; EPILOG-NEXT: %0 = add i64 %trip, -1
; EPILOG-NEXT: %xtraiter = and i64 %trip, 7
; EPILOG-NEXT: %1 = icmp ult i64 %0, 7
; EPILOG-NEXT: br i1 %1, label %exit1.unr-lcssa, label %entry.new
; EPILOG: entry.new:
; EPILOG-NEXT: %unroll_iter = sub i64 %trip, %xtraiter
; EPILOG-NEXT: br label %loop_header
; EPILOG: loop_header:
; EPILOG-NEXT: %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.7, %loop_latch.7 ]
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2:
; EPILOG-NEXT: %unknown = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch:
; EPILOG-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG: exit1.unr-lcssa.loopexit:
; EPILOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: br label %exit1.unr-lcssa
; EPILOG: exit1.unr-lcssa:
; EPILOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit1.unr-lcssa.loopexit ]
; EPILOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT: br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG: loop_header.epil.preheader:
; EPILOG-NEXT: br label %loop_header.epil
; EPILOG: loop_header.epil:
; EPILOG-NEXT: %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
; EPILOG-NEXT: %epil.iter = phi i64 [ %xtraiter, %loop_header.epil.preheader ], [ %epil.iter.sub, %loop_latch.epil ]
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG: loop_exiting_bb2.epil:
; EPILOG-NEXT: %unknown.epil = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.epil, label %loop_latch.epil, label %exit1.epilog-lcssa.loopexit1
; EPILOG: loop_latch.epil:
; EPILOG-NEXT: %iv_next.epil = add i64 %iv.epil, 1
; EPILOG-NEXT: %cmp.epil = icmp ne i64 %iv_next.epil, %trip
; EPILOG-NEXT: %epil.iter.sub = sub i64 %epil.iter, 1
; EPILOG-NEXT: %epil.iter.cmp = icmp ne i64 %epil.iter.sub, 0
; EPILOG-NEXT: br i1 %epil.iter.cmp, label %loop_header.epil, label %exit1.epilog-lcssa.loopexit1, !llvm.loop !17
; EPILOG: exit1.epilog-lcssa.loopexit:
; EPILOG-NEXT: br label %exit1.epilog-lcssa
; EPILOG: exit1.epilog-lcssa.loopexit1:
; EPILOG-NEXT: br label %exit1.epilog-lcssa
; EPILOG: exit1.epilog-lcssa:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1:
; EPILOG-NEXT: ret void
; EPILOG: loop_exiting_bb2.1:
; EPILOG-NEXT: %unknown.1 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.1, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.1:
; EPILOG-NEXT: %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_exiting_bb2.2, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.2:
; EPILOG-NEXT: %unknown.2 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.2, label %loop_latch.2, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.2:
; EPILOG-NEXT: %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT: %niter.nsub.2 = sub i64 %niter.nsub.1, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_exiting_bb2.3, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.3:
; EPILOG-NEXT: %unknown.3 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.3, label %loop_latch.3, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.3:
; EPILOG-NEXT: %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT: %niter.nsub.3 = sub i64 %niter.nsub.2, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_exiting_bb2.4, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.4:
; EPILOG-NEXT: %unknown.4 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.4, label %loop_latch.4, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.4:
; EPILOG-NEXT: %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT: %niter.nsub.4 = sub i64 %niter.nsub.3, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_exiting_bb2.5, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.5:
; EPILOG-NEXT: %unknown.5 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.5, label %loop_latch.5, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.5:
; EPILOG-NEXT: %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT: %niter.nsub.5 = sub i64 %niter.nsub.4, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_exiting_bb2.6, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.6:
; EPILOG-NEXT: %unknown.6 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.6, label %loop_latch.6, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.6:
; EPILOG-NEXT: %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT: %niter.nsub.6 = sub i64 %niter.nsub.5, 1
; EPILOG-NEXT: call void @bar()
; EPILOG-NEXT: br i1 %cond, label %loop_exiting_bb2.7, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_exiting_bb2.7:
; EPILOG-NEXT: %unknown.7 = call i1 @unknown_cond()
; EPILOG-NEXT: br i1 %unknown.7, label %loop_latch.7, label %exit1.epilog-lcssa.loopexit
; EPILOG: loop_latch.7:
; EPILOG-NEXT: %iv_next.7 = add i64 %iv_next.6, 1
; EPILOG-NEXT: %niter.nsub.7 = sub i64 %niter.nsub.6, 1
; EPILOG-NEXT: %niter.ncmp.7 = icmp ne i64 %niter.nsub.7, 0
; EPILOG-NEXT: br i1 %niter.ncmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
;
; EPILOG-BLOCK-LABEL: @test14(
; EPILOG-BLOCK-NEXT: entry:
; EPILOG-BLOCK-NEXT: %0 = add i64 %trip, -1
; EPILOG-BLOCK-NEXT: %xtraiter = and i64 %trip, 1
; EPILOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; EPILOG-BLOCK-NEXT: br i1 %1, label %exit1.unr-lcssa, label %entry.new
; EPILOG-BLOCK: entry.new:
; EPILOG-BLOCK-NEXT: %unroll_iter = sub i64 %trip, %xtraiter
; EPILOG-BLOCK-NEXT: br label %loop_header
; EPILOG-BLOCK: loop_header:
; EPILOG-BLOCK-NEXT: %iv = phi i64 [ 0, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: br i1 %cond, label %loop_exiting_bb2, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: loop_exiting_bb2:
; EPILOG-BLOCK-NEXT: %unknown = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT: br i1 %unknown, label %loop_latch, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: loop_latch:
; EPILOG-BLOCK-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: br i1 %cond, label %loop_exiting_bb2.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: exit1.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit1.unr-lcssa
; EPILOG-BLOCK: exit1.unr-lcssa:
; EPILOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT: br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit1
; EPILOG-BLOCK: loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT: br label %loop_header.epil
; EPILOG-BLOCK: loop_header.epil:
; EPILOG-BLOCK-NEXT: call void @bar()
; EPILOG-BLOCK-NEXT: br i1 %cond, label %loop_exiting_bb2.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK: loop_exiting_bb2.epil:
; EPILOG-BLOCK-NEXT: %unknown.epil = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT: br i1 %unknown.epil, label %loop_latch.epil, label %exit1.epilog-lcssa
; EPILOG-BLOCK: loop_latch.epil:
; EPILOG-BLOCK-NEXT: br label %exit1.epilog-lcssa
; EPILOG-BLOCK: exit1.epilog-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit1.epilog-lcssa
; EPILOG-BLOCK: exit1.epilog-lcssa:
; EPILOG-BLOCK-NEXT: br label %exit1
; EPILOG-BLOCK: exit1:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: loop_exiting_bb2.1:
; EPILOG-BLOCK-NEXT: %unknown.1 = call i1 @unknown_cond()
; EPILOG-BLOCK-NEXT: br i1 %unknown.1, label %loop_latch.1, label %exit1.epilog-lcssa.loopexit
; EPILOG-BLOCK: loop_latch.1:
; EPILOG-BLOCK-NEXT: %iv_next.1 = add i64 %iv_next, 1
; EPILOG-BLOCK-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-BLOCK-NEXT: %niter.ncmp.1 = icmp ne i64 %niter.nsub.1, 0
; EPILOG-BLOCK-NEXT: br i1 %niter.ncmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !19
;
; PROLOG-LABEL: @test14(
; PROLOG-NEXT: entry:
; PROLOG-NEXT: %0 = add i64 %trip, -1
; PROLOG-NEXT: %xtraiter = and i64 %trip, 7
; PROLOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT: br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG: loop_header.prol.preheader:
; PROLOG-NEXT: br label %loop_header.prol
; PROLOG: loop_header.prol:
; PROLOG-NEXT: %iv.prol = phi i64 [ 0, %loop_header.prol.preheader ], [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT: %prol.iter = phi i64 [ %xtraiter, %loop_header.prol.preheader ], [ %prol.iter.sub, %loop_latch.prol ]
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG: loop_exiting_bb2.prol:
; PROLOG-NEXT: %unknown.prol = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.prol, label %loop_latch.prol, label %exit1.unr-lcssa.loopexit1
; PROLOG: loop_latch.prol:
; PROLOG-NEXT: %iv_next.prol = add i64 %iv.prol, 1
; PROLOG-NEXT: %cmp.prol = icmp ne i64 %iv_next.prol, %trip
; PROLOG-NEXT: %prol.iter.sub = sub i64 %prol.iter, 1
; PROLOG-NEXT: %prol.iter.cmp = icmp ne i64 %prol.iter.sub, 0
; PROLOG-NEXT: br i1 %prol.iter.cmp, label %loop_header.prol, label %loop_header.prol.loopexit.unr-lcssa, !llvm.loop !17
; PROLOG: loop_header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.prol, %loop_latch.prol ]
; PROLOG-NEXT: br label %loop_header.prol.loopexit
; PROLOG: loop_header.prol.loopexit:
; PROLOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %loop_header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT: %1 = icmp ult i64 %0, 7
; PROLOG-NEXT: br i1 %1, label %exit1, label %entry.new
; PROLOG: entry.new:
; PROLOG-NEXT: br label %loop_header
; PROLOG: loop_header:
; PROLOG-NEXT: %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2:
; PROLOG-NEXT: %unknown = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch:
; PROLOG-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG: exit1.unr-lcssa.loopexit:
; PROLOG-NEXT: br label %exit1.unr-lcssa
; PROLOG: exit1.unr-lcssa.loopexit1:
; PROLOG-NEXT: br label %exit1.unr-lcssa
; PROLOG: exit1.unr-lcssa:
; PROLOG-NEXT: br label %exit1
; PROLOG: exit1:
; PROLOG-NEXT: ret void
; PROLOG: loop_exiting_bb2.1:
; PROLOG-NEXT: %unknown.1 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.1, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.1:
; PROLOG-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_exiting_bb2.2, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.2:
; PROLOG-NEXT: %unknown.2 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.2, label %loop_latch.2, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.2:
; PROLOG-NEXT: %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_exiting_bb2.3, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.3:
; PROLOG-NEXT: %unknown.3 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.3, label %loop_latch.3, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.3:
; PROLOG-NEXT: %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_exiting_bb2.4, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.4:
; PROLOG-NEXT: %unknown.4 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.4, label %loop_latch.4, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.4:
; PROLOG-NEXT: %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_exiting_bb2.5, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.5:
; PROLOG-NEXT: %unknown.5 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.5, label %loop_latch.5, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.5:
; PROLOG-NEXT: %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_exiting_bb2.6, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.6:
; PROLOG-NEXT: %unknown.6 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.6, label %loop_latch.6, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.6:
; PROLOG-NEXT: %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT: call void @bar()
; PROLOG-NEXT: br i1 %cond, label %loop_exiting_bb2.7, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_exiting_bb2.7:
; PROLOG-NEXT: %unknown.7 = call i1 @unknown_cond()
; PROLOG-NEXT: br i1 %unknown.7, label %loop_latch.7, label %exit1.unr-lcssa.loopexit
; PROLOG: loop_latch.7:
; PROLOG-NEXT: %iv_next.7 = add i64 %iv_next.6, 1
; PROLOG-NEXT: %cmp.7 = icmp ne i64 %iv_next.7, %trip
; PROLOG-NEXT: br i1 %cmp.7, label %loop_header, label %exit1.unr-lcssa.loopexit
;
; PROLOG-BLOCK-LABEL: @test14(
; PROLOG-BLOCK-NEXT: entry:
; PROLOG-BLOCK-NEXT: %0 = add i64 %trip, -1
; PROLOG-BLOCK-NEXT: %xtraiter = and i64 %trip, 1
; PROLOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT: br i1 %lcmp.mod, label %loop_header.prol.preheader, label %loop_header.prol.loopexit
; PROLOG-BLOCK: loop_header.prol.preheader:
; PROLOG-BLOCK-NEXT: br label %loop_header.prol
; PROLOG-BLOCK: loop_header.prol:
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: br i1 %cond, label %loop_exiting_bb2.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK: loop_exiting_bb2.prol:
; PROLOG-BLOCK-NEXT: %unknown.prol = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT: br i1 %unknown.prol, label %loop_latch.prol, label %exit1.unr-lcssa
; PROLOG-BLOCK: loop_latch.prol:
; PROLOG-BLOCK-NEXT: br label %loop_header.prol.loopexit
; PROLOG-BLOCK: loop_header.prol.loopexit:
; PROLOG-BLOCK-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ 1, %loop_latch.prol ]
; PROLOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; PROLOG-BLOCK-NEXT: br i1 %1, label %exit1, label %entry.new
; PROLOG-BLOCK: entry.new:
; PROLOG-BLOCK-NEXT: br label %loop_header
; PROLOG-BLOCK: loop_header:
; PROLOG-BLOCK-NEXT: %iv = phi i64 [ %iv.unr, %entry.new ], [ %iv_next.1, %loop_latch.1 ]
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: br i1 %cond, label %loop_exiting_bb2, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: loop_exiting_bb2:
; PROLOG-BLOCK-NEXT: %unknown = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT: br i1 %unknown, label %loop_latch, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: loop_latch:
; PROLOG-BLOCK-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT: call void @bar()
; PROLOG-BLOCK-NEXT: br i1 %cond, label %loop_exiting_bb2.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: exit1.unr-lcssa.loopexit:
; PROLOG-BLOCK-NEXT: br label %exit1.unr-lcssa
; PROLOG-BLOCK: exit1.unr-lcssa:
; PROLOG-BLOCK-NEXT: br label %exit1
; PROLOG-BLOCK: exit1:
; PROLOG-BLOCK-NEXT: ret void
; PROLOG-BLOCK: loop_exiting_bb2.1:
; PROLOG-BLOCK-NEXT: %unknown.1 = call i1 @unknown_cond()
; PROLOG-BLOCK-NEXT: br i1 %unknown.1, label %loop_latch.1, label %exit1.unr-lcssa.loopexit
; PROLOG-BLOCK: loop_latch.1:
; PROLOG-BLOCK-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-BLOCK-NEXT: %cmp.1 = icmp ne i64 %iv_next.1, %trip
; PROLOG-BLOCK-NEXT: br i1 %cmp.1, label %loop_header, label %exit1.unr-lcssa.loopexit, !llvm.loop !19
;
entry:
br label %loop_header

loop_header:
%iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
call void @bar()
br i1 %cond, label %loop_exiting_bb2, label %exit1

loop_exiting_bb2:
%unknown = call i1 @unknown_cond()
br i1 %unknown, label %loop_latch, label %exit1

loop_latch:
%iv_next = add i64 %iv, 1
%cmp = icmp ne i64 %iv_next, %trip
br i1 %cmp, label %loop_header, label %exit1

exit1:
ret void
}