derek.holloway
7502bf64a4
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35 lines
1009 B
LLVM
35 lines
1009 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
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; RUN: opt -S -passes=indvars < %s | FileCheck %s
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; The comparison should not get folded to false.
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define void @test() {
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; CHECK-LABEL: define void @test() {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i8 [ 1, [[ENTRY:%.*]] ], [ [[IV_DEC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[IV_DEC]] = add nsw i8 [[IV]], -1
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; CHECK-NEXT: [[SHL:%.*]] = shl i8 [[IV]], 7
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; CHECK-NEXT: call void @use(i8 [[SHL]])
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i8 [[SHL]], 0
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; CHECK-NEXT: br i1 [[CMP1]], label [[EXIT:%.*]], label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%iv = phi i8 [ 1, %entry ], [ %iv.dec, %loop ]
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%iv.dec = add i8 %iv, -1
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%shl = shl i8 %iv, 7
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call void @use(i8 %shl)
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%cmp1 = icmp eq i8 %shl, 0
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br i1 %cmp1, label %exit, label %loop
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exit:
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ret void
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}
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declare void @use(i32)
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