/
runtime-loop-multiple-exits.ll
5003 lines (4905 loc) · 276 KB
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runtime-loop-multiple-exits.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: -p
; RUN: opt < %s -loop-unroll -unroll-runtime=true -unroll-runtime-epilog=true -unroll-runtime-multi-exit=true -verify-loop-lcssa -verify-dom-info -verify-loop-info -S | FileCheck %s -check-prefixes=CHECK,EPILOG
; RUN: opt < %s -loop-unroll -unroll-runtime -unroll-count=2 -unroll-runtime-epilog=true -unroll-runtime-multi-exit=true -verify-loop-lcssa -verify-dom-info -verify-loop-info -S | FileCheck %s -check-prefixes=CHECK,EPILOG-BLOCK
; RUN: opt < %s -loop-unroll -unroll-runtime=true -unroll-runtime-epilog=false -unroll-runtime-multi-exit=true -verify-loop-lcssa -verify-dom-info -verify-loop-info -S | FileCheck %s -check-prefixes=CHECK,PROLOG
; RUN: opt < %s -loop-unroll -unroll-runtime -unroll-runtime-epilog=false -unroll-count=2 -unroll-runtime-multi-exit=true -verify-loop-lcssa -verify-dom-info -verify-loop-info -S | FileCheck %s -check-prefixes=CHECK,PROLOG-BLOCK
; REQUIRES: asserts
; test with three exiting and three exit blocks.
; none of the exit blocks have successors
define void @test1(i64 %trip, i1 %cond) {
; EPILOG-LABEL: @test1(
; 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.loopexit.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: br i1 %cond, label %loop_latch, label %loop_exiting_bb1
; EPILOG: loop_exiting_bb1:
; EPILOG-NEXT: br i1 false, label %loop_exiting_bb2, label %exit1.loopexit
; EPILOG: loop_exiting_bb2:
; EPILOG-NEXT: br i1 false, label %loop_latch, label %exit3.loopexit
; EPILOG: exit3.loopexit:
; EPILOG-NEXT: br label %exit3
; EPILOG: exit3.loopexit2:
; EPILOG-NEXT: br label %exit3
; EPILOG: exit3:
; EPILOG-NEXT: ret void
; EPILOG: loop_latch:
; EPILOG-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-NEXT: br i1 %cond, label %loop_latch.1, label %loop_exiting_bb1.1
; EPILOG: exit1.loopexit:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1.loopexit1:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1:
; EPILOG-NEXT: ret void
; EPILOG: exit2.loopexit.unr-lcssa.loopexit:
; EPILOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: br label %exit2.loopexit.unr-lcssa
; EPILOG: exit2.loopexit.unr-lcssa:
; EPILOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.loopexit.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.loopexit
; 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: br i1 %cond, label %loop_latch.epil, label %loop_exiting_bb1.epil
; EPILOG: loop_exiting_bb1.epil:
; EPILOG-NEXT: br i1 false, label %loop_exiting_bb2.epil, label %exit1.loopexit1
; EPILOG: loop_exiting_bb2.epil:
; EPILOG-NEXT: br i1 false, label %loop_latch.epil, label %exit3.loopexit2
; 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.loopexit.epilog-lcssa, !llvm.loop !0
; EPILOG: exit2.loopexit.epilog-lcssa:
; EPILOG-NEXT: br label %exit2.loopexit
; EPILOG: exit2.loopexit:
; EPILOG-NEXT: ret void
; EPILOG: loop_exiting_bb1.1:
; EPILOG-NEXT: br i1 false, label %loop_exiting_bb2.1, label %exit1.loopexit
; EPILOG: loop_exiting_bb2.1:
; EPILOG-NEXT: br i1 false, label %loop_latch.1, label %exit3.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: br i1 %cond, label %loop_latch.2, label %loop_exiting_bb1.2
; EPILOG: loop_exiting_bb1.2:
; EPILOG-NEXT: br i1 false, label %loop_exiting_bb2.2, label %exit1.loopexit
; EPILOG: loop_exiting_bb2.2:
; EPILOG-NEXT: br i1 false, label %loop_latch.2, label %exit3.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: br i1 %cond, label %loop_latch.3, label %loop_exiting_bb1.3
; EPILOG: loop_exiting_bb1.3:
; EPILOG-NEXT: br i1 false, label %loop_exiting_bb2.3, label %exit1.loopexit
; EPILOG: loop_exiting_bb2.3:
; EPILOG-NEXT: br i1 false, label %loop_latch.3, label %exit3.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: br i1 %cond, label %loop_latch.4, label %loop_exiting_bb1.4
; EPILOG: loop_exiting_bb1.4:
; EPILOG-NEXT: br i1 false, label %loop_exiting_bb2.4, label %exit1.loopexit
; EPILOG: loop_exiting_bb2.4:
; EPILOG-NEXT: br i1 false, label %loop_latch.4, label %exit3.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: br i1 %cond, label %loop_latch.5, label %loop_exiting_bb1.5
; EPILOG: loop_exiting_bb1.5:
; EPILOG-NEXT: br i1 false, label %loop_exiting_bb2.5, label %exit1.loopexit
; EPILOG: loop_exiting_bb2.5:
; EPILOG-NEXT: br i1 false, label %loop_latch.5, label %exit3.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: br i1 %cond, label %loop_latch.6, label %loop_exiting_bb1.6
; EPILOG: loop_exiting_bb1.6:
; EPILOG-NEXT: br i1 false, label %loop_exiting_bb2.6, label %exit1.loopexit
; EPILOG: loop_exiting_bb2.6:
; EPILOG-NEXT: br i1 false, label %loop_latch.6, label %exit3.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: br i1 %cond, label %loop_latch.7, label %loop_exiting_bb1.7
; EPILOG: loop_exiting_bb1.7:
; EPILOG-NEXT: br i1 false, label %loop_exiting_bb2.7, label %exit1.loopexit
; EPILOG: loop_exiting_bb2.7:
; EPILOG-NEXT: br i1 false, label %loop_latch.7, label %exit3.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.loopexit.unr-lcssa.loopexit
;
; EPILOG-BLOCK-LABEL: @test1(
; 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.loopexit.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: br i1 %cond, label %loop_latch, label %loop_exiting_bb1
; EPILOG-BLOCK: loop_exiting_bb1:
; EPILOG-BLOCK-NEXT: br i1 false, label %loop_exiting_bb2, label %exit1.loopexit
; EPILOG-BLOCK: loop_exiting_bb2:
; EPILOG-BLOCK-NEXT: br i1 false, label %loop_latch, label %exit3.loopexit
; EPILOG-BLOCK: exit3.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit3
; EPILOG-BLOCK: exit3:
; EPILOG-BLOCK-NEXT: ret void
; 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: br i1 %cond, label %loop_latch.1, label %loop_exiting_bb1.1
; EPILOG-BLOCK: exit1.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit1
; EPILOG-BLOCK: exit1:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: exit2.loopexit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit2.loopexit.unr-lcssa
; EPILOG-BLOCK: exit2.loopexit.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.loopexit
; EPILOG-BLOCK: loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT: br label %loop_header.epil
; EPILOG-BLOCK: loop_header.epil:
; EPILOG-BLOCK-NEXT: br i1 %cond, label %loop_latch.epil, label %loop_exiting_bb1.epil
; EPILOG-BLOCK: loop_exiting_bb1.epil:
; EPILOG-BLOCK-NEXT: br i1 false, label %loop_exiting_bb2.epil, label %exit1
; EPILOG-BLOCK: loop_exiting_bb2.epil:
; EPILOG-BLOCK-NEXT: br i1 false, label %loop_latch.epil, label %exit3
; EPILOG-BLOCK: loop_latch.epil:
; EPILOG-BLOCK-NEXT: br label %exit2.loopexit
; EPILOG-BLOCK: exit2.loopexit:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: loop_exiting_bb1.1:
; EPILOG-BLOCK-NEXT: br i1 false, label %loop_exiting_bb2.1, label %exit1.loopexit
; EPILOG-BLOCK: loop_exiting_bb2.1:
; EPILOG-BLOCK-NEXT: br i1 false, label %loop_latch.1, label %exit3.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 %exit2.loopexit.unr-lcssa.loopexit, !llvm.loop !0
;
; PROLOG-LABEL: @test1(
; 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: br i1 %cond, label %loop_latch.prol, label %loop_exiting_bb1.prol
; PROLOG: loop_exiting_bb1.prol:
; PROLOG-NEXT: br i1 false, label %loop_exiting_bb2.prol, label %exit1.loopexit1
; PROLOG: loop_exiting_bb2.prol:
; PROLOG-NEXT: br i1 false, label %loop_latch.prol, label %exit3.loopexit2
; 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 !0
; 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.loopexit, 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: br i1 %cond, label %loop_latch, label %loop_exiting_bb1
; PROLOG: loop_exiting_bb1:
; PROLOG-NEXT: br i1 false, label %loop_exiting_bb2, label %exit1.loopexit
; PROLOG: loop_exiting_bb2:
; PROLOG-NEXT: br i1 false, label %loop_latch, label %exit3.loopexit
; PROLOG: exit3.loopexit:
; PROLOG-NEXT: br label %exit3
; PROLOG: exit3.loopexit2:
; PROLOG-NEXT: br label %exit3
; PROLOG: exit3:
; PROLOG-NEXT: ret void
; PROLOG: loop_latch:
; PROLOG-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-NEXT: br i1 %cond, label %loop_latch.1, label %loop_exiting_bb1.1
; PROLOG: exit1.loopexit:
; PROLOG-NEXT: br label %exit1
; PROLOG: exit1.loopexit1:
; PROLOG-NEXT: br label %exit1
; PROLOG: exit1:
; PROLOG-NEXT: ret void
; PROLOG: exit2.loopexit.unr-lcssa:
; PROLOG-NEXT: br label %exit2.loopexit
; PROLOG: exit2.loopexit:
; PROLOG-NEXT: ret void
; PROLOG: loop_exiting_bb1.1:
; PROLOG-NEXT: br i1 false, label %loop_exiting_bb2.1, label %exit1.loopexit
; PROLOG: loop_exiting_bb2.1:
; PROLOG-NEXT: br i1 false, label %loop_latch.1, label %exit3.loopexit
; PROLOG: loop_latch.1:
; PROLOG-NEXT: %iv_next.1 = add i64 %iv_next, 1
; PROLOG-NEXT: br i1 %cond, label %loop_latch.2, label %loop_exiting_bb1.2
; PROLOG: loop_exiting_bb1.2:
; PROLOG-NEXT: br i1 false, label %loop_exiting_bb2.2, label %exit1.loopexit
; PROLOG: loop_exiting_bb2.2:
; PROLOG-NEXT: br i1 false, label %loop_latch.2, label %exit3.loopexit
; PROLOG: loop_latch.2:
; PROLOG-NEXT: %iv_next.2 = add i64 %iv_next.1, 1
; PROLOG-NEXT: br i1 %cond, label %loop_latch.3, label %loop_exiting_bb1.3
; PROLOG: loop_exiting_bb1.3:
; PROLOG-NEXT: br i1 false, label %loop_exiting_bb2.3, label %exit1.loopexit
; PROLOG: loop_exiting_bb2.3:
; PROLOG-NEXT: br i1 false, label %loop_latch.3, label %exit3.loopexit
; PROLOG: loop_latch.3:
; PROLOG-NEXT: %iv_next.3 = add i64 %iv_next.2, 1
; PROLOG-NEXT: br i1 %cond, label %loop_latch.4, label %loop_exiting_bb1.4
; PROLOG: loop_exiting_bb1.4:
; PROLOG-NEXT: br i1 false, label %loop_exiting_bb2.4, label %exit1.loopexit
; PROLOG: loop_exiting_bb2.4:
; PROLOG-NEXT: br i1 false, label %loop_latch.4, label %exit3.loopexit
; PROLOG: loop_latch.4:
; PROLOG-NEXT: %iv_next.4 = add i64 %iv_next.3, 1
; PROLOG-NEXT: br i1 %cond, label %loop_latch.5, label %loop_exiting_bb1.5
; PROLOG: loop_exiting_bb1.5:
; PROLOG-NEXT: br i1 false, label %loop_exiting_bb2.5, label %exit1.loopexit
; PROLOG: loop_exiting_bb2.5:
; PROLOG-NEXT: br i1 false, label %loop_latch.5, label %exit3.loopexit
; PROLOG: loop_latch.5:
; PROLOG-NEXT: %iv_next.5 = add i64 %iv_next.4, 1
; PROLOG-NEXT: br i1 %cond, label %loop_latch.6, label %loop_exiting_bb1.6
; PROLOG: loop_exiting_bb1.6:
; PROLOG-NEXT: br i1 false, label %loop_exiting_bb2.6, label %exit1.loopexit
; PROLOG: loop_exiting_bb2.6:
; PROLOG-NEXT: br i1 false, label %loop_latch.6, label %exit3.loopexit
; PROLOG: loop_latch.6:
; PROLOG-NEXT: %iv_next.6 = add i64 %iv_next.5, 1
; PROLOG-NEXT: br i1 %cond, label %loop_latch.7, label %loop_exiting_bb1.7
; PROLOG: loop_exiting_bb1.7:
; PROLOG-NEXT: br i1 false, label %loop_exiting_bb2.7, label %exit1.loopexit
; PROLOG: loop_exiting_bb2.7:
; PROLOG-NEXT: br i1 false, label %loop_latch.7, label %exit3.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.loopexit.unr-lcssa
;
; PROLOG-BLOCK-LABEL: @test1(
; 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: br i1 %cond, label %loop_latch.prol, label %loop_exiting_bb1.prol
; PROLOG-BLOCK: loop_exiting_bb1.prol:
; PROLOG-BLOCK-NEXT: br i1 false, label %loop_exiting_bb2.prol, label %exit1
; PROLOG-BLOCK: loop_exiting_bb2.prol:
; PROLOG-BLOCK-NEXT: br i1 false, label %loop_latch.prol, label %exit3
; 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.loopexit, 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: br i1 %cond, label %loop_latch, label %loop_exiting_bb1
; PROLOG-BLOCK: loop_exiting_bb1:
; PROLOG-BLOCK-NEXT: br i1 false, label %loop_exiting_bb2, label %exit1.loopexit
; PROLOG-BLOCK: loop_exiting_bb2:
; PROLOG-BLOCK-NEXT: br i1 false, label %loop_latch, label %exit3.loopexit
; PROLOG-BLOCK: exit3.loopexit:
; PROLOG-BLOCK-NEXT: br label %exit3
; PROLOG-BLOCK: exit3:
; PROLOG-BLOCK-NEXT: ret void
; PROLOG-BLOCK: loop_latch:
; PROLOG-BLOCK-NEXT: %iv_next = add i64 %iv, 1
; PROLOG-BLOCK-NEXT: br i1 %cond, label %loop_latch.1, label %loop_exiting_bb1.1
; PROLOG-BLOCK: exit1.loopexit:
; PROLOG-BLOCK-NEXT: br label %exit1
; PROLOG-BLOCK: exit1:
; PROLOG-BLOCK-NEXT: ret void
; PROLOG-BLOCK: exit2.loopexit.unr-lcssa:
; PROLOG-BLOCK-NEXT: br label %exit2.loopexit
; PROLOG-BLOCK: exit2.loopexit:
; PROLOG-BLOCK-NEXT: ret void
; PROLOG-BLOCK: loop_exiting_bb1.1:
; PROLOG-BLOCK-NEXT: br i1 false, label %loop_exiting_bb2.1, label %exit1.loopexit
; PROLOG-BLOCK: loop_exiting_bb2.1:
; PROLOG-BLOCK-NEXT: br i1 false, label %loop_latch.1, label %exit3.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 %exit2.loopexit.unr-lcssa, !llvm.loop !0
;
entry:
br label %loop_header
loop_header:
%iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
br i1 %cond, label %loop_latch, label %loop_exiting_bb1
loop_exiting_bb1:
br i1 false, label %loop_exiting_bb2, label %exit1
loop_exiting_bb2:
br i1 false, label %loop_latch, label %exit3
exit3:
ret void
loop_latch:
%iv_next = add i64 %iv, 1
%cmp = icmp ne i64 %iv_next, %trip
br i1 %cmp, label %loop_header, label %exit2.loopexit
exit1:
ret void
exit2.loopexit:
ret void
}
; test with three exiting and two exit blocks.
; The non-latch exit block has 2 unique predecessors.
; There are 2 values passed to the exit blocks that are calculated at every iteration.
; %sum.02 and %add. Both of these are incoming values for phi from every exiting
; unrolled block.
define i32 @test2(i32* nocapture %a, i64 %n) {
; EPILOG-LABEL: @test2(
; EPILOG-NEXT: entry:
; EPILOG-NEXT: %0 = add i64 %n, -1
; EPILOG-NEXT: %xtraiter = and i64 %n, 7
; EPILOG-NEXT: %1 = icmp ult i64 %0, 7
; EPILOG-NEXT: br i1 %1, label %for.end.unr-lcssa, label %entry.new
; EPILOG: entry.new:
; EPILOG-NEXT: %unroll_iter = sub i64 %n, %xtraiter
; EPILOG-NEXT: br label %header
; EPILOG: header:
; EPILOG-NEXT: %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.7, %for.body.7 ]
; EPILOG-NEXT: %sum.02 = phi i32 [ 0, %entry.new ], [ %add.7, %for.body.7 ]
; EPILOG-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.7, %for.body.7 ]
; EPILOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG: for.exiting_block:
; EPILOG-NEXT: %cmp = icmp eq i64 %n, 42
; EPILOG-NEXT: br i1 %cmp, label %for.exit2.loopexit, label %for.body
; EPILOG: for.body:
; EPILOG-NEXT: %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
; EPILOG-NEXT: %2 = load i32, i32* %arrayidx, align 4
; EPILOG-NEXT: %add = add nsw i32 %2, %sum.02
; EPILOG-NEXT: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG: for.end.unr-lcssa.loopexit:
; EPILOG-NEXT: %sum.0.lcssa.ph.ph = phi i32 [ %add.7, %for.body.7 ]
; EPILOG-NEXT: %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.7, %for.body.7 ]
; EPILOG-NEXT: %sum.02.unr.ph = phi i32 [ %add.7, %for.body.7 ]
; EPILOG-NEXT: br label %for.end.unr-lcssa
; EPILOG: for.end.unr-lcssa:
; EPILOG-NEXT: %sum.0.lcssa.ph = phi i32 [ undef, %entry ], [ %sum.0.lcssa.ph.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-NEXT: %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-NEXT: %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-NEXT: br i1 %lcmp.mod, label %header.epil.preheader, label %for.end
; EPILOG: header.epil.preheader:
; EPILOG-NEXT: br label %header.epil
; EPILOG: header.epil:
; EPILOG-NEXT: %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %for.body.epil ], [ %indvars.iv.unr, %header.epil.preheader ]
; EPILOG-NEXT: %sum.02.epil = phi i32 [ %add.epil, %for.body.epil ], [ %sum.02.unr, %header.epil.preheader ]
; EPILOG-NEXT: %epil.iter = phi i64 [ %xtraiter, %header.epil.preheader ], [ %epil.iter.sub, %for.body.epil ]
; EPILOG-NEXT: br i1 false, label %for.exit2.loopexit2, label %for.exiting_block.epil
; EPILOG: for.exiting_block.epil:
; EPILOG-NEXT: %cmp.epil = icmp eq i64 %n, 42
; EPILOG-NEXT: br i1 %cmp.epil, label %for.exit2.loopexit2, label %for.body.epil
; EPILOG: for.body.epil:
; EPILOG-NEXT: %arrayidx.epil = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.epil
; EPILOG-NEXT: %3 = load i32, i32* %arrayidx.epil, align 4
; EPILOG-NEXT: %add.epil = add nsw i32 %3, %sum.02.epil
; EPILOG-NEXT: %indvars.iv.next.epil = add i64 %indvars.iv.epil, 1
; EPILOG-NEXT: %exitcond.epil = icmp eq i64 %indvars.iv.next.epil, %n
; 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 %header.epil, label %for.end.epilog-lcssa, !llvm.loop !2
; EPILOG: for.end.epilog-lcssa:
; EPILOG-NEXT: %sum.0.lcssa.ph1 = phi i32 [ %add.epil, %for.body.epil ]
; EPILOG-NEXT: br label %for.end
; EPILOG: for.end:
; EPILOG-NEXT: %sum.0.lcssa = phi i32 [ %sum.0.lcssa.ph, %for.end.unr-lcssa ], [ %sum.0.lcssa.ph1, %for.end.epilog-lcssa ]
; EPILOG-NEXT: ret i32 %sum.0.lcssa
; EPILOG: for.exit2.loopexit:
; EPILOG-NEXT: %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %for.body ], [ 42, %for.exiting_block.1 ], [ %add.1, %for.body.1 ], [ 42, %for.exiting_block.2 ], [ %add.2, %for.body.2 ], [ 42, %for.exiting_block.3 ], [ %add.3, %for.body.3 ], [ 42, %for.exiting_block.4 ], [ %add.4, %for.body.4 ], [ 42, %for.exiting_block.5 ], [ %add.5, %for.body.5 ], [ 42, %for.exiting_block.6 ], [ %add.6, %for.body.6 ], [ 42, %for.exiting_block.7 ]
; EPILOG-NEXT: br label %for.exit2
; EPILOG: for.exit2.loopexit2:
; EPILOG-NEXT: %retval.ph3 = phi i32 [ 42, %for.exiting_block.epil ], [ %sum.02.epil, %header.epil ]
; EPILOG-NEXT: br label %for.exit2
; EPILOG: for.exit2:
; EPILOG-NEXT: %retval = phi i32 [ %retval.ph, %for.exit2.loopexit ], [ %retval.ph3, %for.exit2.loopexit2 ]
; EPILOG-NEXT: ret i32 %retval
; EPILOG: for.exiting_block.1:
; EPILOG-NEXT: %cmp.1 = icmp eq i64 %n, 42
; EPILOG-NEXT: br i1 %cmp.1, label %for.exit2.loopexit, label %for.body.1
; EPILOG: for.body.1:
; EPILOG-NEXT: %arrayidx.1 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next
; EPILOG-NEXT: %4 = load i32, i32* %arrayidx.1, align 4
; EPILOG-NEXT: %add.1 = add nsw i32 %4, %add
; EPILOG-NEXT: %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
; EPILOG-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.2
; EPILOG: for.exiting_block.2:
; EPILOG-NEXT: %cmp.2 = icmp eq i64 %n, 42
; EPILOG-NEXT: br i1 %cmp.2, label %for.exit2.loopexit, label %for.body.2
; EPILOG: for.body.2:
; EPILOG-NEXT: %arrayidx.2 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.1
; EPILOG-NEXT: %5 = load i32, i32* %arrayidx.2, align 4
; EPILOG-NEXT: %add.2 = add nsw i32 %5, %add.1
; EPILOG-NEXT: %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv.next.1, 1
; EPILOG-NEXT: %niter.nsub.2 = sub i64 %niter.nsub.1, 1
; EPILOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.3
; EPILOG: for.exiting_block.3:
; EPILOG-NEXT: %cmp.3 = icmp eq i64 %n, 42
; EPILOG-NEXT: br i1 %cmp.3, label %for.exit2.loopexit, label %for.body.3
; EPILOG: for.body.3:
; EPILOG-NEXT: %arrayidx.3 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.2
; EPILOG-NEXT: %6 = load i32, i32* %arrayidx.3, align 4
; EPILOG-NEXT: %add.3 = add nsw i32 %6, %add.2
; EPILOG-NEXT: %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv.next.2, 1
; EPILOG-NEXT: %niter.nsub.3 = sub i64 %niter.nsub.2, 1
; EPILOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.4
; EPILOG: for.exiting_block.4:
; EPILOG-NEXT: %cmp.4 = icmp eq i64 %n, 42
; EPILOG-NEXT: br i1 %cmp.4, label %for.exit2.loopexit, label %for.body.4
; EPILOG: for.body.4:
; EPILOG-NEXT: %arrayidx.4 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.3
; EPILOG-NEXT: %7 = load i32, i32* %arrayidx.4, align 4
; EPILOG-NEXT: %add.4 = add nsw i32 %7, %add.3
; EPILOG-NEXT: %indvars.iv.next.4 = add nuw nsw i64 %indvars.iv.next.3, 1
; EPILOG-NEXT: %niter.nsub.4 = sub i64 %niter.nsub.3, 1
; EPILOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.5
; EPILOG: for.exiting_block.5:
; EPILOG-NEXT: %cmp.5 = icmp eq i64 %n, 42
; EPILOG-NEXT: br i1 %cmp.5, label %for.exit2.loopexit, label %for.body.5
; EPILOG: for.body.5:
; EPILOG-NEXT: %arrayidx.5 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.4
; EPILOG-NEXT: %8 = load i32, i32* %arrayidx.5, align 4
; EPILOG-NEXT: %add.5 = add nsw i32 %8, %add.4
; EPILOG-NEXT: %indvars.iv.next.5 = add nuw nsw i64 %indvars.iv.next.4, 1
; EPILOG-NEXT: %niter.nsub.5 = sub i64 %niter.nsub.4, 1
; EPILOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.6
; EPILOG: for.exiting_block.6:
; EPILOG-NEXT: %cmp.6 = icmp eq i64 %n, 42
; EPILOG-NEXT: br i1 %cmp.6, label %for.exit2.loopexit, label %for.body.6
; EPILOG: for.body.6:
; EPILOG-NEXT: %arrayidx.6 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.5
; EPILOG-NEXT: %9 = load i32, i32* %arrayidx.6, align 4
; EPILOG-NEXT: %add.6 = add nsw i32 %9, %add.5
; EPILOG-NEXT: %indvars.iv.next.6 = add nuw nsw i64 %indvars.iv.next.5, 1
; EPILOG-NEXT: %niter.nsub.6 = sub i64 %niter.nsub.5, 1
; EPILOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.7
; EPILOG: for.exiting_block.7:
; EPILOG-NEXT: %cmp.7 = icmp eq i64 %n, 42
; EPILOG-NEXT: br i1 %cmp.7, label %for.exit2.loopexit, label %for.body.7
; EPILOG: for.body.7:
; EPILOG-NEXT: %arrayidx.7 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.6
; EPILOG-NEXT: %10 = load i32, i32* %arrayidx.7, align 4
; EPILOG-NEXT: %add.7 = add nsw i32 %10, %add.6
; EPILOG-NEXT: %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; EPILOG-NEXT: %niter.nsub.7 = sub i64 %niter.nsub.6, 1
; EPILOG-NEXT: %niter.ncmp.7 = icmp eq i64 %niter.nsub.7, 0
; EPILOG-NEXT: br i1 %niter.ncmp.7, label %for.end.unr-lcssa.loopexit, label %header
;
; EPILOG-BLOCK-LABEL: @test2(
; EPILOG-BLOCK-NEXT: entry:
; EPILOG-BLOCK-NEXT: %0 = add i64 %n, -1
; EPILOG-BLOCK-NEXT: %xtraiter = and i64 %n, 1
; EPILOG-BLOCK-NEXT: %1 = icmp ult i64 %0, 1
; EPILOG-BLOCK-NEXT: br i1 %1, label %for.end.unr-lcssa, label %entry.new
; EPILOG-BLOCK: entry.new:
; EPILOG-BLOCK-NEXT: %unroll_iter = sub i64 %n, %xtraiter
; EPILOG-BLOCK-NEXT: br label %header
; EPILOG-BLOCK: header:
; EPILOG-BLOCK-NEXT: %indvars.iv = phi i64 [ 0, %entry.new ], [ %indvars.iv.next.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT: %sum.02 = phi i32 [ 0, %entry.new ], [ %add.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; EPILOG-BLOCK: for.exiting_block:
; EPILOG-BLOCK-NEXT: %cmp = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT: br i1 %cmp, label %for.exit2.loopexit, label %for.body
; EPILOG-BLOCK: for.body:
; EPILOG-BLOCK-NEXT: %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
; EPILOG-BLOCK-NEXT: %2 = load i32, i32* %arrayidx, align 4
; EPILOG-BLOCK-NEXT: %add = add nsw i32 %2, %sum.02
; EPILOG-BLOCK-NEXT: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; EPILOG-BLOCK-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-BLOCK-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; EPILOG-BLOCK: for.end.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: %sum.0.lcssa.ph.ph = phi i32 [ %add.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT: %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT: %sum.02.unr.ph = phi i32 [ %add.1, %for.body.1 ]
; EPILOG-BLOCK-NEXT: br label %for.end.unr-lcssa
; EPILOG-BLOCK: for.end.unr-lcssa:
; EPILOG-BLOCK-NEXT: %sum.0.lcssa.ph = phi i32 [ undef, %entry ], [ %sum.0.lcssa.ph.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT: %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT: %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %for.end.unr-lcssa.loopexit ]
; EPILOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; EPILOG-BLOCK-NEXT: br i1 %lcmp.mod, label %header.epil.preheader, label %for.end
; EPILOG-BLOCK: header.epil.preheader:
; EPILOG-BLOCK-NEXT: br label %header.epil
; EPILOG-BLOCK: header.epil:
; EPILOG-BLOCK-NEXT: br i1 false, label %for.exit2, label %for.exiting_block.epil
; EPILOG-BLOCK: for.exiting_block.epil:
; EPILOG-BLOCK-NEXT: %cmp.epil = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT: br i1 %cmp.epil, label %for.exit2, label %for.body.epil
; EPILOG-BLOCK: for.body.epil:
; EPILOG-BLOCK-NEXT: %arrayidx.epil = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.unr
; EPILOG-BLOCK-NEXT: %3 = load i32, i32* %arrayidx.epil, align 4
; EPILOG-BLOCK-NEXT: %add.epil = add nsw i32 %3, %sum.02.unr
; EPILOG-BLOCK-NEXT: br label %for.end
; EPILOG-BLOCK: for.end:
; EPILOG-BLOCK-NEXT: %sum.0.lcssa = phi i32 [ %sum.0.lcssa.ph, %for.end.unr-lcssa ], [ %add.epil, %for.body.epil ]
; EPILOG-BLOCK-NEXT: ret i32 %sum.0.lcssa
; EPILOG-BLOCK: for.exit2.loopexit:
; EPILOG-BLOCK-NEXT: %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %for.body ], [ 42, %for.exiting_block.1 ]
; EPILOG-BLOCK-NEXT: br label %for.exit2
; EPILOG-BLOCK: for.exit2:
; EPILOG-BLOCK-NEXT: %retval = phi i32 [ %sum.02.unr, %header.epil ], [ 42, %for.exiting_block.epil ], [ %retval.ph, %for.exit2.loopexit ]
; EPILOG-BLOCK-NEXT: ret i32 %retval
; EPILOG-BLOCK: for.exiting_block.1:
; EPILOG-BLOCK-NEXT: %cmp.1 = icmp eq i64 %n, 42
; EPILOG-BLOCK-NEXT: br i1 %cmp.1, label %for.exit2.loopexit, label %for.body.1
; EPILOG-BLOCK: for.body.1:
; EPILOG-BLOCK-NEXT: %arrayidx.1 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next
; EPILOG-BLOCK-NEXT: %4 = load i32, i32* %arrayidx.1, align 4
; EPILOG-BLOCK-NEXT: %add.1 = add nsw i32 %4, %add
; EPILOG-BLOCK-NEXT: %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; EPILOG-BLOCK-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-BLOCK-NEXT: %niter.ncmp.1 = icmp eq i64 %niter.nsub.1, 0
; EPILOG-BLOCK-NEXT: br i1 %niter.ncmp.1, label %for.end.unr-lcssa.loopexit, label %header, !llvm.loop !2
;
; PROLOG-LABEL: @test2(
; PROLOG-NEXT: entry:
; PROLOG-NEXT: %0 = add i64 %n, -1
; PROLOG-NEXT: %xtraiter = and i64 %n, 7
; PROLOG-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-NEXT: br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG: header.prol.preheader:
; PROLOG-NEXT: br label %header.prol
; PROLOG: header.prol:
; PROLOG-NEXT: %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %for.body.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT: %sum.02.prol = phi i32 [ %add.prol, %for.body.prol ], [ 0, %header.prol.preheader ]
; PROLOG-NEXT: %prol.iter = phi i64 [ %xtraiter, %header.prol.preheader ], [ %prol.iter.sub, %for.body.prol ]
; PROLOG-NEXT: br i1 false, label %for.exit2.loopexit1, label %for.exiting_block.prol
; PROLOG: for.exiting_block.prol:
; PROLOG-NEXT: %cmp.prol = icmp eq i64 %n, 42
; PROLOG-NEXT: br i1 %cmp.prol, label %for.exit2.loopexit1, label %for.body.prol
; PROLOG: for.body.prol:
; PROLOG-NEXT: %arrayidx.prol = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.prol
; PROLOG-NEXT: %1 = load i32, i32* %arrayidx.prol, align 4
; PROLOG-NEXT: %add.prol = add nsw i32 %1, %sum.02.prol
; PROLOG-NEXT: %indvars.iv.next.prol = add i64 %indvars.iv.prol, 1
; PROLOG-NEXT: %exitcond.prol = icmp eq i64 %indvars.iv.next.prol, %n
; 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 %header.prol, label %header.prol.loopexit.unr-lcssa, !llvm.loop !2
; PROLOG: header.prol.loopexit.unr-lcssa:
; PROLOG-NEXT: %sum.0.lcssa.unr.ph = phi i32 [ %add.prol, %for.body.prol ]
; PROLOG-NEXT: %indvars.iv.unr.ph = phi i64 [ %indvars.iv.next.prol, %for.body.prol ]
; PROLOG-NEXT: %sum.02.unr.ph = phi i32 [ %add.prol, %for.body.prol ]
; PROLOG-NEXT: br label %header.prol.loopexit
; PROLOG: header.prol.loopexit:
; PROLOG-NEXT: %sum.0.lcssa.unr = phi i32 [ undef, %entry ], [ %sum.0.lcssa.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT: %indvars.iv.unr = phi i64 [ 0, %entry ], [ %indvars.iv.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT: %sum.02.unr = phi i32 [ 0, %entry ], [ %sum.02.unr.ph, %header.prol.loopexit.unr-lcssa ]
; PROLOG-NEXT: %2 = icmp ult i64 %0, 7
; PROLOG-NEXT: br i1 %2, label %for.end, label %entry.new
; PROLOG: entry.new:
; PROLOG-NEXT: br label %header
; PROLOG: header:
; PROLOG-NEXT: %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.7, %for.body.7 ]
; PROLOG-NEXT: %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.7, %for.body.7 ]
; PROLOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG: for.exiting_block:
; PROLOG-NEXT: %cmp = icmp eq i64 %n, 42
; PROLOG-NEXT: br i1 %cmp, label %for.exit2.loopexit, label %for.body
; PROLOG: for.body:
; PROLOG-NEXT: %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
; PROLOG-NEXT: %3 = load i32, i32* %arrayidx, align 4
; PROLOG-NEXT: %add = add nsw i32 %3, %sum.02
; PROLOG-NEXT: %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG: for.end.unr-lcssa:
; PROLOG-NEXT: %sum.0.lcssa.ph = phi i32 [ %add.7, %for.body.7 ]
; PROLOG-NEXT: br label %for.end
; PROLOG: for.end:
; PROLOG-NEXT: %sum.0.lcssa = phi i32 [ %sum.0.lcssa.unr, %header.prol.loopexit ], [ %sum.0.lcssa.ph, %for.end.unr-lcssa ]
; PROLOG-NEXT: ret i32 %sum.0.lcssa
; PROLOG: for.exit2.loopexit:
; PROLOG-NEXT: %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %for.body ], [ 42, %for.exiting_block.1 ], [ %add.1, %for.body.1 ], [ 42, %for.exiting_block.2 ], [ %add.2, %for.body.2 ], [ 42, %for.exiting_block.3 ], [ %add.3, %for.body.3 ], [ 42, %for.exiting_block.4 ], [ %add.4, %for.body.4 ], [ 42, %for.exiting_block.5 ], [ %add.5, %for.body.5 ], [ 42, %for.exiting_block.6 ], [ %add.6, %for.body.6 ], [ 42, %for.exiting_block.7 ]
; PROLOG-NEXT: br label %for.exit2
; PROLOG: for.exit2.loopexit1:
; PROLOG-NEXT: %retval.ph2 = phi i32 [ 42, %for.exiting_block.prol ], [ %sum.02.prol, %header.prol ]
; PROLOG-NEXT: br label %for.exit2
; PROLOG: for.exit2:
; PROLOG-NEXT: %retval = phi i32 [ %retval.ph, %for.exit2.loopexit ], [ %retval.ph2, %for.exit2.loopexit1 ]
; PROLOG-NEXT: ret i32 %retval
; PROLOG: for.exiting_block.1:
; PROLOG-NEXT: %cmp.1 = icmp eq i64 %n, 42
; PROLOG-NEXT: br i1 %cmp.1, label %for.exit2.loopexit, label %for.body.1
; PROLOG: for.body.1:
; PROLOG-NEXT: %arrayidx.1 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next
; PROLOG-NEXT: %4 = load i32, i32* %arrayidx.1, align 4
; PROLOG-NEXT: %add.1 = add nsw i32 %4, %add
; PROLOG-NEXT: %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.2
; PROLOG: for.exiting_block.2:
; PROLOG-NEXT: %cmp.2 = icmp eq i64 %n, 42
; PROLOG-NEXT: br i1 %cmp.2, label %for.exit2.loopexit, label %for.body.2
; PROLOG: for.body.2:
; PROLOG-NEXT: %arrayidx.2 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.1
; PROLOG-NEXT: %5 = load i32, i32* %arrayidx.2, align 4
; PROLOG-NEXT: %add.2 = add nsw i32 %5, %add.1
; PROLOG-NEXT: %indvars.iv.next.2 = add i64 %indvars.iv.next.1, 1
; PROLOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.3
; PROLOG: for.exiting_block.3:
; PROLOG-NEXT: %cmp.3 = icmp eq i64 %n, 42
; PROLOG-NEXT: br i1 %cmp.3, label %for.exit2.loopexit, label %for.body.3
; PROLOG: for.body.3:
; PROLOG-NEXT: %arrayidx.3 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.2
; PROLOG-NEXT: %6 = load i32, i32* %arrayidx.3, align 4
; PROLOG-NEXT: %add.3 = add nsw i32 %6, %add.2
; PROLOG-NEXT: %indvars.iv.next.3 = add i64 %indvars.iv.next.2, 1
; PROLOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.4
; PROLOG: for.exiting_block.4:
; PROLOG-NEXT: %cmp.4 = icmp eq i64 %n, 42
; PROLOG-NEXT: br i1 %cmp.4, label %for.exit2.loopexit, label %for.body.4
; PROLOG: for.body.4:
; PROLOG-NEXT: %arrayidx.4 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.3
; PROLOG-NEXT: %7 = load i32, i32* %arrayidx.4, align 4
; PROLOG-NEXT: %add.4 = add nsw i32 %7, %add.3
; PROLOG-NEXT: %indvars.iv.next.4 = add i64 %indvars.iv.next.3, 1
; PROLOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.5
; PROLOG: for.exiting_block.5:
; PROLOG-NEXT: %cmp.5 = icmp eq i64 %n, 42
; PROLOG-NEXT: br i1 %cmp.5, label %for.exit2.loopexit, label %for.body.5
; PROLOG: for.body.5:
; PROLOG-NEXT: %arrayidx.5 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.4
; PROLOG-NEXT: %8 = load i32, i32* %arrayidx.5, align 4
; PROLOG-NEXT: %add.5 = add nsw i32 %8, %add.4
; PROLOG-NEXT: %indvars.iv.next.5 = add i64 %indvars.iv.next.4, 1
; PROLOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.6
; PROLOG: for.exiting_block.6:
; PROLOG-NEXT: %cmp.6 = icmp eq i64 %n, 42
; PROLOG-NEXT: br i1 %cmp.6, label %for.exit2.loopexit, label %for.body.6
; PROLOG: for.body.6:
; PROLOG-NEXT: %arrayidx.6 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.5
; PROLOG-NEXT: %9 = load i32, i32* %arrayidx.6, align 4
; PROLOG-NEXT: %add.6 = add nsw i32 %9, %add.5
; PROLOG-NEXT: %indvars.iv.next.6 = add i64 %indvars.iv.next.5, 1
; PROLOG-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.7
; PROLOG: for.exiting_block.7:
; PROLOG-NEXT: %cmp.7 = icmp eq i64 %n, 42
; PROLOG-NEXT: br i1 %cmp.7, label %for.exit2.loopexit, label %for.body.7
; PROLOG: for.body.7:
; PROLOG-NEXT: %arrayidx.7 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next.6
; PROLOG-NEXT: %10 = load i32, i32* %arrayidx.7, align 4
; PROLOG-NEXT: %add.7 = add nsw i32 %10, %add.6
; PROLOG-NEXT: %indvars.iv.next.7 = add i64 %indvars.iv.next.6, 1
; PROLOG-NEXT: %exitcond.7 = icmp eq i64 %indvars.iv.next.7, %n
; PROLOG-NEXT: br i1 %exitcond.7, label %for.end.unr-lcssa, label %header
;
; PROLOG-BLOCK-LABEL: @test2(
; PROLOG-BLOCK-NEXT: entry:
; PROLOG-BLOCK-NEXT: %0 = add i64 %n, -1
; PROLOG-BLOCK-NEXT: %xtraiter = and i64 %n, 1
; PROLOG-BLOCK-NEXT: %lcmp.mod = icmp ne i64 %xtraiter, 0
; PROLOG-BLOCK-NEXT: br i1 %lcmp.mod, label %header.prol.preheader, label %header.prol.loopexit
; PROLOG-BLOCK: header.prol.preheader:
; PROLOG-BLOCK-NEXT: br label %header.prol
; PROLOG-BLOCK: header.prol:
; PROLOG-BLOCK-NEXT: br i1 false, label %for.exit2, label %for.exiting_block.prol
; PROLOG-BLOCK: for.exiting_block.prol:
; PROLOG-BLOCK-NEXT: %cmp.prol = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT: br i1 %cmp.prol, label %for.exit2, label %for.body.prol
; PROLOG-BLOCK: for.body.prol:
; PROLOG-BLOCK-NEXT: %1 = load i32, i32* %a, align 4
; PROLOG-BLOCK-NEXT: br label %header.prol.loopexit
; PROLOG-BLOCK: header.prol.loopexit:
; PROLOG-BLOCK-NEXT: %sum.0.lcssa.unr = phi i32 [ undef, %entry ], [ %1, %for.body.prol ]
; PROLOG-BLOCK-NEXT: %indvars.iv.unr = phi i64 [ 0, %entry ], [ 1, %for.body.prol ]
; PROLOG-BLOCK-NEXT: %sum.02.unr = phi i32 [ 0, %entry ], [ %1, %for.body.prol ]
; PROLOG-BLOCK-NEXT: %2 = icmp ult i64 %0, 1
; PROLOG-BLOCK-NEXT: br i1 %2, label %for.end, label %entry.new
; PROLOG-BLOCK: entry.new:
; PROLOG-BLOCK-NEXT: br label %header
; PROLOG-BLOCK: header:
; PROLOG-BLOCK-NEXT: %indvars.iv = phi i64 [ %indvars.iv.unr, %entry.new ], [ %indvars.iv.next.1, %for.body.1 ]
; PROLOG-BLOCK-NEXT: %sum.02 = phi i32 [ %sum.02.unr, %entry.new ], [ %add.1, %for.body.1 ]
; PROLOG-BLOCK-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block
; PROLOG-BLOCK: for.exiting_block:
; PROLOG-BLOCK-NEXT: %cmp = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT: br i1 %cmp, label %for.exit2.loopexit, label %for.body
; PROLOG-BLOCK: for.body:
; PROLOG-BLOCK-NEXT: %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
; PROLOG-BLOCK-NEXT: %3 = load i32, i32* %arrayidx, align 4
; PROLOG-BLOCK-NEXT: %add = add nsw i32 %3, %sum.02
; PROLOG-BLOCK-NEXT: %indvars.iv.next = add i64 %indvars.iv, 1
; PROLOG-BLOCK-NEXT: br i1 false, label %for.exit2.loopexit, label %for.exiting_block.1
; PROLOG-BLOCK: for.end.unr-lcssa:
; PROLOG-BLOCK-NEXT: %sum.0.lcssa.ph = phi i32 [ %add.1, %for.body.1 ]
; PROLOG-BLOCK-NEXT: br label %for.end
; PROLOG-BLOCK: for.end:
; PROLOG-BLOCK-NEXT: %sum.0.lcssa = phi i32 [ %sum.0.lcssa.unr, %header.prol.loopexit ], [ %sum.0.lcssa.ph, %for.end.unr-lcssa ]
; PROLOG-BLOCK-NEXT: ret i32 %sum.0.lcssa
; PROLOG-BLOCK: for.exit2.loopexit:
; PROLOG-BLOCK-NEXT: %retval.ph = phi i32 [ 42, %for.exiting_block ], [ %sum.02, %header ], [ %add, %for.body ], [ 42, %for.exiting_block.1 ]
; PROLOG-BLOCK-NEXT: br label %for.exit2
; PROLOG-BLOCK: for.exit2:
; PROLOG-BLOCK-NEXT: %retval = phi i32 [ 0, %header.prol ], [ 42, %for.exiting_block.prol ], [ %retval.ph, %for.exit2.loopexit ]
; PROLOG-BLOCK-NEXT: ret i32 %retval
; PROLOG-BLOCK: for.exiting_block.1:
; PROLOG-BLOCK-NEXT: %cmp.1 = icmp eq i64 %n, 42
; PROLOG-BLOCK-NEXT: br i1 %cmp.1, label %for.exit2.loopexit, label %for.body.1
; PROLOG-BLOCK: for.body.1:
; PROLOG-BLOCK-NEXT: %arrayidx.1 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv.next
; PROLOG-BLOCK-NEXT: %4 = load i32, i32* %arrayidx.1, align 4
; PROLOG-BLOCK-NEXT: %add.1 = add nsw i32 %4, %add
; PROLOG-BLOCK-NEXT: %indvars.iv.next.1 = add i64 %indvars.iv.next, 1
; PROLOG-BLOCK-NEXT: %exitcond.1 = icmp eq i64 %indvars.iv.next.1, %n
; PROLOG-BLOCK-NEXT: br i1 %exitcond.1, label %for.end.unr-lcssa, label %header, !llvm.loop !2
;
entry:
br label %header
header:
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
%sum.02 = phi i32 [ %add, %for.body ], [ 0, %entry ]
br i1 false, label %for.exit2, label %for.exiting_block
for.exiting_block:
%cmp = icmp eq i64 %n, 42
br i1 %cmp, label %for.exit2, label %for.body
for.body:
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
%0 = load i32, i32* %arrayidx, align 4
%add = add nsw i32 %0, %sum.02
%indvars.iv.next = add i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond, label %for.end, label %header
for.end: ; preds = %for.body
%sum.0.lcssa = phi i32 [ %add, %for.body ]
ret i32 %sum.0.lcssa
for.exit2:
%retval = phi i32 [ %sum.02, %header ], [ 42, %for.exiting_block ]
ret i32 %retval
}
; test with two exiting and three exit blocks.
; the non-latch exiting block has a switch.
define void @test3(i64 %trip, i64 %add) {
; EPILOG-LABEL: @test3(
; 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.loopexit.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: %sum = phi i64 [ 0, %entry.new ], [ %sum.next.7, %loop_latch.7 ]
; EPILOG-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.7, %loop_latch.7 ]
; EPILOG-NEXT: br i1 undef, label %loop_latch, label %loop_exiting_bb1
; EPILOG: loop_exiting_bb1:
; EPILOG-NEXT: switch i64 %sum, label %loop_latch [
; EPILOG-NEXT: i64 24, label %exit1.loopexit
; EPILOG-NEXT: i64 42, label %exit3.loopexit
; EPILOG-NEXT: ]
; EPILOG: exit3.loopexit:
; EPILOG-NEXT: br label %exit3
; EPILOG: exit3.loopexit2:
; EPILOG-NEXT: br label %exit3
; EPILOG: exit3:
; EPILOG-NEXT: ret void
; EPILOG: loop_latch:
; EPILOG-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-NEXT: %sum.next = add i64 %sum, %add
; EPILOG-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-NEXT: br i1 undef, label %loop_latch.1, label %loop_exiting_bb1.1
; EPILOG: exit1.loopexit:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1.loopexit1:
; EPILOG-NEXT: br label %exit1
; EPILOG: exit1:
; EPILOG-NEXT: ret void
; EPILOG: exit2.loopexit.unr-lcssa.loopexit:
; EPILOG-NEXT: %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
; EPILOG-NEXT: %sum.unr.ph = phi i64 [ %sum.next.7, %loop_latch.7 ]
; EPILOG-NEXT: br label %exit2.loopexit.unr-lcssa
; EPILOG: exit2.loopexit.unr-lcssa:
; EPILOG-NEXT: %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.loopexit.unr-lcssa.loopexit ]
; EPILOG-NEXT: %sum.unr = phi i64 [ 0, %entry ], [ %sum.unr.ph, %exit2.loopexit.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.loopexit
; 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: %sum.epil = phi i64 [ %sum.unr, %loop_header.epil.preheader ], [ %sum.next.epil, %loop_latch.epil ]
; EPILOG-NEXT: %epil.iter = phi i64 [ %xtraiter, %loop_header.epil.preheader ], [ %epil.iter.sub, %loop_latch.epil ]
; EPILOG-NEXT: br i1 undef, label %loop_latch.epil, label %loop_exiting_bb1.epil
; EPILOG: loop_exiting_bb1.epil:
; EPILOG-NEXT: switch i64 %sum.epil, label %loop_latch.epil [
; EPILOG-NEXT: i64 24, label %exit1.loopexit1
; EPILOG-NEXT: i64 42, label %exit3.loopexit2
; EPILOG-NEXT: ]
; EPILOG: loop_latch.epil:
; EPILOG-NEXT: %iv_next.epil = add nuw nsw i64 %iv.epil, 1
; EPILOG-NEXT: %sum.next.epil = add i64 %sum.epil, %add
; 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.loopexit.epilog-lcssa, !llvm.loop !3
; EPILOG: exit2.loopexit.epilog-lcssa:
; EPILOG-NEXT: br label %exit2.loopexit
; EPILOG: exit2.loopexit:
; EPILOG-NEXT: ret void
; EPILOG: loop_exiting_bb1.1:
; EPILOG-NEXT: switch i64 %sum.next, label %loop_latch.1 [
; EPILOG-NEXT: i64 24, label %exit1.loopexit
; EPILOG-NEXT: i64 42, label %exit3.loopexit
; EPILOG-NEXT: ]
; EPILOG: loop_latch.1:
; EPILOG-NEXT: %iv_next.1 = add nuw nsw i64 %iv_next, 1
; EPILOG-NEXT: %sum.next.1 = add i64 %sum.next, %add
; EPILOG-NEXT: %niter.nsub.1 = sub i64 %niter.nsub, 1
; EPILOG-NEXT: br i1 undef, label %loop_latch.2, label %loop_exiting_bb1.2
; EPILOG: loop_exiting_bb1.2:
; EPILOG-NEXT: switch i64 %sum.next.1, label %loop_latch.2 [
; EPILOG-NEXT: i64 24, label %exit1.loopexit
; EPILOG-NEXT: i64 42, label %exit3.loopexit
; EPILOG-NEXT: ]
; EPILOG: loop_latch.2:
; EPILOG-NEXT: %iv_next.2 = add nuw nsw i64 %iv_next.1, 1
; EPILOG-NEXT: %sum.next.2 = add i64 %sum.next.1, %add
; EPILOG-NEXT: %niter.nsub.2 = sub i64 %niter.nsub.1, 1
; EPILOG-NEXT: br i1 undef, label %loop_latch.3, label %loop_exiting_bb1.3
; EPILOG: loop_exiting_bb1.3:
; EPILOG-NEXT: switch i64 %sum.next.2, label %loop_latch.3 [
; EPILOG-NEXT: i64 24, label %exit1.loopexit
; EPILOG-NEXT: i64 42, label %exit3.loopexit
; EPILOG-NEXT: ]
; EPILOG: loop_latch.3:
; EPILOG-NEXT: %iv_next.3 = add nuw nsw i64 %iv_next.2, 1
; EPILOG-NEXT: %sum.next.3 = add i64 %sum.next.2, %add
; EPILOG-NEXT: %niter.nsub.3 = sub i64 %niter.nsub.2, 1
; EPILOG-NEXT: br i1 undef, label %loop_latch.4, label %loop_exiting_bb1.4
; EPILOG: loop_exiting_bb1.4:
; EPILOG-NEXT: switch i64 %sum.next.3, label %loop_latch.4 [
; EPILOG-NEXT: i64 24, label %exit1.loopexit
; EPILOG-NEXT: i64 42, label %exit3.loopexit
; EPILOG-NEXT: ]
; EPILOG: loop_latch.4:
; EPILOG-NEXT: %iv_next.4 = add nuw nsw i64 %iv_next.3, 1
; EPILOG-NEXT: %sum.next.4 = add i64 %sum.next.3, %add
; EPILOG-NEXT: %niter.nsub.4 = sub i64 %niter.nsub.3, 1
; EPILOG-NEXT: br i1 undef, label %loop_latch.5, label %loop_exiting_bb1.5
; EPILOG: loop_exiting_bb1.5:
; EPILOG-NEXT: switch i64 %sum.next.4, label %loop_latch.5 [
; EPILOG-NEXT: i64 24, label %exit1.loopexit
; EPILOG-NEXT: i64 42, label %exit3.loopexit
; EPILOG-NEXT: ]
; EPILOG: loop_latch.5:
; EPILOG-NEXT: %iv_next.5 = add nuw nsw i64 %iv_next.4, 1
; EPILOG-NEXT: %sum.next.5 = add i64 %sum.next.4, %add
; EPILOG-NEXT: %niter.nsub.5 = sub i64 %niter.nsub.4, 1
; EPILOG-NEXT: br i1 undef, label %loop_latch.6, label %loop_exiting_bb1.6
; EPILOG: loop_exiting_bb1.6:
; EPILOG-NEXT: switch i64 %sum.next.5, label %loop_latch.6 [
; EPILOG-NEXT: i64 24, label %exit1.loopexit
; EPILOG-NEXT: i64 42, label %exit3.loopexit
; EPILOG-NEXT: ]
; EPILOG: loop_latch.6:
; EPILOG-NEXT: %iv_next.6 = add nuw nsw i64 %iv_next.5, 1
; EPILOG-NEXT: %sum.next.6 = add i64 %sum.next.5, %add
; EPILOG-NEXT: %niter.nsub.6 = sub i64 %niter.nsub.5, 1
; EPILOG-NEXT: br i1 undef, label %loop_latch.7, label %loop_exiting_bb1.7
; EPILOG: loop_exiting_bb1.7:
; EPILOG-NEXT: switch i64 %sum.next.6, label %loop_latch.7 [
; EPILOG-NEXT: i64 24, label %exit1.loopexit
; EPILOG-NEXT: i64 42, label %exit3.loopexit
; EPILOG-NEXT: ]
; EPILOG: loop_latch.7:
; EPILOG-NEXT: %iv_next.7 = add nuw nsw i64 %iv_next.6, 1
; EPILOG-NEXT: %sum.next.7 = add i64 %sum.next.6, %add
; 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.loopexit.unr-lcssa.loopexit
;
; EPILOG-BLOCK-LABEL: @test3(
; 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.loopexit.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: %sum = phi i64 [ 0, %entry.new ], [ %sum.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: br i1 undef, label %loop_latch, label %loop_exiting_bb1
; EPILOG-BLOCK: loop_exiting_bb1:
; EPILOG-BLOCK-NEXT: switch i64 %sum, label %loop_latch [
; EPILOG-BLOCK-NEXT: i64 24, label %exit1.loopexit
; EPILOG-BLOCK-NEXT: i64 42, label %exit3.loopexit
; EPILOG-BLOCK-NEXT: ]
; EPILOG-BLOCK: exit3.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit3
; EPILOG-BLOCK: exit3:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: loop_latch:
; EPILOG-BLOCK-NEXT: %iv_next = add nuw nsw i64 %iv, 1
; EPILOG-BLOCK-NEXT: %sum.next = add i64 %sum, %add
; EPILOG-BLOCK-NEXT: %niter.nsub = sub i64 %niter, 1
; EPILOG-BLOCK-NEXT: br i1 undef, label %loop_latch.1, label %loop_exiting_bb1.1
; EPILOG-BLOCK: exit1.loopexit:
; EPILOG-BLOCK-NEXT: br label %exit1
; EPILOG-BLOCK: exit1:
; EPILOG-BLOCK-NEXT: ret void
; EPILOG-BLOCK: exit2.loopexit.unr-lcssa.loopexit:
; EPILOG-BLOCK-NEXT: %sum.unr.ph = phi i64 [ %sum.next.1, %loop_latch.1 ]
; EPILOG-BLOCK-NEXT: br label %exit2.loopexit.unr-lcssa
; EPILOG-BLOCK: exit2.loopexit.unr-lcssa:
; EPILOG-BLOCK-NEXT: %sum.unr = phi i64 [ 0, %entry ], [ %sum.unr.ph, %exit2.loopexit.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.loopexit
; EPILOG-BLOCK: loop_header.epil.preheader:
; EPILOG-BLOCK-NEXT: br label %loop_header.epil
; EPILOG-BLOCK: loop_header.epil:
; EPILOG-BLOCK-NEXT: br i1 undef, label %loop_latch.epil, label %loop_exiting_bb1.epil
; EPILOG-BLOCK: loop_exiting_bb1.epil: