derek.holloway
7502bf64a4
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36 lines
1.4 KiB
LLVM
36 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt %s -passes=instcombine,mem2reg,simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -o - | FileCheck %s
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; Test to make sure that instcombine does not accidentally propagate the load
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; into the PHI, which would break the program.
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define i32 @test(i1 %C) {
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; CHECK-LABEL: define i32 @test(
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; CHECK-SAME: i1 [[C:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[X:%.*]] = alloca i32, align 4
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; CHECK-NEXT: [[X2:%.*]] = alloca i32, align 4
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; CHECK-NEXT: store i32 1, ptr [[X]], align 4
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; CHECK-NEXT: store i32 2, ptr [[X2]], align 4
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[C]], ptr [[X]], ptr [[X2]]
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; CHECK-NEXT: store i32 3, ptr [[X]], align 4
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; CHECK-NEXT: [[TMP_3:%.*]] = load i32, ptr [[SPEC_SELECT]], align 4
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; CHECK-NEXT: ret i32 [[TMP_3]]
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;
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entry:
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%X = alloca i32 ; <ptr> [#uses=3]
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%X2 = alloca i32 ; <ptr> [#uses=2]
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store i32 1, ptr %X
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store i32 2, ptr %X2
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br i1 %C, label %cond_true.i, label %cond_continue.i
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cond_true.i: ; preds = %entry
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br label %cond_continue.i
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cond_continue.i: ; preds = %cond_true.i, %entry
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%mem_tmp.i.0 = phi ptr [ %X, %cond_true.i ], [ %X2, %entry ] ; <ptr> [#uses=1]
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store i32 3, ptr %X
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%tmp.3 = load i32, ptr %mem_tmp.i.0 ; <i32> [#uses=1]
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ret i32 %tmp.3
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}
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