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[Tests] Add cases where we're failing to discharge provably loop exit…
…s (tests for D63733) llvm-svn: 364220
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py | ||
; RUN: opt -indvars -S < %s | FileCheck %s | ||
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define void @ult(i64 %n, i64 %m) { | ||
; CHECK-LABEL: @ult( | ||
; CHECK-NEXT: entry: | ||
; CHECK-NEXT: [[CMP0:%.*]] = icmp ult i64 [[N:%.*]], [[M:%.*]] | ||
; CHECK-NEXT: br i1 [[CMP0]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]] | ||
; CHECK: loop.preheader: | ||
; CHECK-NEXT: br label [[LOOP:%.*]] | ||
; CHECK: loop: | ||
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ], [ 0, [[LOOP_PREHEADER]] ] | ||
; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1 | ||
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], [[N]] | ||
; CHECK-NEXT: br i1 [[CMP1]], label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]] | ||
; CHECK: latch: | ||
; CHECK-NEXT: call void @side_effect() | ||
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[IV]], [[M]] | ||
; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT_LOOPEXIT]] | ||
; CHECK: exit.loopexit: | ||
; CHECK-NEXT: br label [[EXIT]] | ||
; CHECK: exit: | ||
; CHECK-NEXT: ret void | ||
; | ||
entry: | ||
%cmp0 = icmp ult i64 %n, %m | ||
br i1 %cmp0, label %loop, label %exit | ||
loop: | ||
%iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ] | ||
%iv.next = add i64 %iv, 1 | ||
%cmp1 = icmp ult i64 %iv, %n | ||
br i1 %cmp1, label %latch, label %exit | ||
latch: | ||
call void @side_effect() | ||
%cmp2 = icmp ult i64 %iv, %m | ||
br i1 %cmp2, label %loop, label %exit | ||
exit: | ||
ret void | ||
} | ||
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define void @ugt(i64 %n, i64 %m) { | ||
; CHECK-LABEL: @ugt( | ||
; CHECK-NEXT: entry: | ||
; CHECK-NEXT: [[CMP0:%.*]] = icmp ugt i64 [[N:%.*]], [[M:%.*]] | ||
; CHECK-NEXT: br i1 [[CMP0]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]] | ||
; CHECK: loop.preheader: | ||
; CHECK-NEXT: br label [[LOOP:%.*]] | ||
; CHECK: loop: | ||
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ], [ 0, [[LOOP_PREHEADER]] ] | ||
; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1 | ||
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], [[N]] | ||
; CHECK-NEXT: br i1 [[CMP1]], label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]] | ||
; CHECK: latch: | ||
; CHECK-NEXT: call void @side_effect() | ||
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[IV]], [[M]] | ||
; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT_LOOPEXIT]] | ||
; CHECK: exit.loopexit: | ||
; CHECK-NEXT: br label [[EXIT]] | ||
; CHECK: exit: | ||
; CHECK-NEXT: ret void | ||
; | ||
entry: | ||
%cmp0 = icmp ugt i64 %n, %m | ||
br i1 %cmp0, label %loop, label %exit | ||
loop: | ||
%iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ] | ||
%iv.next = add i64 %iv, 1 | ||
%cmp1 = icmp ult i64 %iv, %n | ||
br i1 %cmp1, label %latch, label %exit | ||
latch: | ||
call void @side_effect() | ||
%cmp2 = icmp ult i64 %iv, %m | ||
br i1 %cmp2, label %loop, label %exit | ||
exit: | ||
ret void | ||
} | ||
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define void @ule(i64 %n, i64 %m) { | ||
; CHECK-LABEL: @ule( | ||
; CHECK-NEXT: entry: | ||
; CHECK-NEXT: [[CMP0:%.*]] = icmp ule i64 [[N:%.*]], [[M:%.*]] | ||
; CHECK-NEXT: br i1 [[CMP0]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]] | ||
; CHECK: loop.preheader: | ||
; CHECK-NEXT: br label [[LOOP:%.*]] | ||
; CHECK: loop: | ||
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ], [ 0, [[LOOP_PREHEADER]] ] | ||
; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1 | ||
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], [[N]] | ||
; CHECK-NEXT: br i1 [[CMP1]], label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]] | ||
; CHECK: latch: | ||
; CHECK-NEXT: call void @side_effect() | ||
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[IV]], [[M]] | ||
; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT_LOOPEXIT]] | ||
; CHECK: exit.loopexit: | ||
; CHECK-NEXT: br label [[EXIT]] | ||
; CHECK: exit: | ||
; CHECK-NEXT: ret void | ||
; | ||
entry: | ||
%cmp0 = icmp ule i64 %n, %m | ||
br i1 %cmp0, label %loop, label %exit | ||
loop: | ||
%iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ] | ||
%iv.next = add i64 %iv, 1 | ||
%cmp1 = icmp ult i64 %iv, %n | ||
br i1 %cmp1, label %latch, label %exit | ||
latch: | ||
call void @side_effect() | ||
%cmp2 = icmp ult i64 %iv, %m | ||
br i1 %cmp2, label %loop, label %exit | ||
exit: | ||
ret void | ||
} | ||
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define void @uge(i64 %n, i64 %m) { | ||
; CHECK-LABEL: @uge( | ||
; CHECK-NEXT: entry: | ||
; CHECK-NEXT: [[CMP0:%.*]] = icmp uge i64 [[N:%.*]], [[M:%.*]] | ||
; CHECK-NEXT: br i1 [[CMP0]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]] | ||
; CHECK: loop.preheader: | ||
; CHECK-NEXT: br label [[LOOP:%.*]] | ||
; CHECK: loop: | ||
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ], [ 0, [[LOOP_PREHEADER]] ] | ||
; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1 | ||
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], [[N]] | ||
; CHECK-NEXT: br i1 [[CMP1]], label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]] | ||
; CHECK: latch: | ||
; CHECK-NEXT: call void @side_effect() | ||
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[IV]], [[M]] | ||
; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT_LOOPEXIT]] | ||
; CHECK: exit.loopexit: | ||
; CHECK-NEXT: br label [[EXIT]] | ||
; CHECK: exit: | ||
; CHECK-NEXT: ret void | ||
; | ||
entry: | ||
%cmp0 = icmp uge i64 %n, %m | ||
br i1 %cmp0, label %loop, label %exit | ||
loop: | ||
%iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ] | ||
%iv.next = add i64 %iv, 1 | ||
%cmp1 = icmp ult i64 %iv, %n | ||
br i1 %cmp1, label %latch, label %exit | ||
latch: | ||
call void @side_effect() | ||
%cmp2 = icmp ult i64 %iv, %m | ||
br i1 %cmp2, label %loop, label %exit | ||
exit: | ||
ret void | ||
} | ||
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define void @ult_const_max(i64 %n) { | ||
; CHECK-LABEL: @ult_const_max( | ||
; CHECK-NEXT: entry: | ||
; CHECK-NEXT: [[CMP0:%.*]] = icmp ult i64 [[N:%.*]], 20 | ||
; CHECK-NEXT: br i1 [[CMP0]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]] | ||
; CHECK: loop.preheader: | ||
; CHECK-NEXT: br label [[LOOP:%.*]] | ||
; CHECK: loop: | ||
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ], [ 0, [[LOOP_PREHEADER]] ] | ||
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1 | ||
; CHECK-NEXT: [[UDIV:%.*]] = udiv i64 [[IV]], 10 | ||
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[UDIV]], 2 | ||
; CHECK-NEXT: br i1 [[CMP1]], label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]] | ||
; CHECK: latch: | ||
; CHECK-NEXT: call void @side_effect() | ||
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[IV]], [[N]] | ||
; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT_LOOPEXIT]] | ||
; CHECK: exit.loopexit: | ||
; CHECK-NEXT: br label [[EXIT]] | ||
; CHECK: exit: | ||
; CHECK-NEXT: ret void | ||
; | ||
entry: | ||
%cmp0 = icmp ult i64 %n, 20 | ||
br i1 %cmp0, label %loop, label %exit | ||
loop: | ||
%iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ] | ||
%iv.next = add i64 %iv, 1 | ||
%udiv = udiv i64 %iv, 10 | ||
%cmp1 = icmp ult i64 %udiv, 2 | ||
br i1 %cmp1, label %latch, label %exit | ||
latch: | ||
call void @side_effect() | ||
%cmp2 = icmp ult i64 %iv, %n | ||
br i1 %cmp2, label %loop, label %exit | ||
exit: | ||
ret void | ||
} | ||
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declare void @side_effect() |