derek.holloway
7502bf64a4
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34 lines
1.1 KiB
LLVM
34 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=gvn -o - %s | FileCheck %s
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define i32 @foo(i1 %cond, ptr %q, ptr %p) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[V0:%.*]] = call i32 @llvm.convergent(i32 0)
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; CHECK-NEXT: store i32 [[V0]], ptr [[Q:%.*]], align 4
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[PRE:%.*]], label [[MERGE:%.*]]
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; CHECK: pre:
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; CHECK-NEXT: [[T0:%.*]] = load i32, ptr [[P:%.*]], align 4
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; CHECK-NEXT: br label [[MERGE]]
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; CHECK: merge:
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; CHECK-NEXT: [[M0:%.*]] = phi i32 [ [[T0]], [[PRE]] ], [ 0, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[R0:%.*]] = call i32 @llvm.convergent(i32 [[M0]])
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; CHECK-NEXT: ret i32 [[R0]]
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;
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entry:
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%v0 = call i32 @llvm.convergent(i32 0)
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store i32 %v0, ptr %q
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br i1 %cond, label %pre, label %merge
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pre:
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%t0 = load i32, ptr %p
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br label %merge
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merge:
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%m0 = phi i32 [ %t0, %pre ], [ 0, %entry ]
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%r0 = call i32 @llvm.convergent(i32 %m0)
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ret i32 %r0
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}
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declare i32 @llvm.convergent(i32) convergent nounwind readnone willreturn
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