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33 lines
959 B
LLVM
33 lines
959 B
LLVM
; RUN: opt -basic-aa -print-memoryssa -verify-memoryssa -analyze < %s 2>&1 | FileCheck %s
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; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
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;
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; Makes sure we have a sane model if both successors of some block is the same
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; block.
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define i32 @foo(i1 %a) {
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entry:
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%0 = alloca i32, align 4
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i32 4
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store i32 4, i32* %0
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br i1 %a, label %Loop.Body, label %Loop.End
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Loop.Body:
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; CHECK: 4 = MemoryPhi({entry,1},{Loop.End,3})
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; CHECK-NEXT: 2 = MemoryDef(4)
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; CHECK-NEXT: store i32 5
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store i32 5, i32* %0, align 4
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br i1 %a, label %Loop.End, label %Loop.End ; WhyDoWeEvenHaveThatLever.gif
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Loop.End:
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; CHECK: 3 = MemoryPhi({entry,1},{Loop.Body,2},{Loop.Body,2})
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; CHECK-NEXT: MemoryUse(3)
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; CHECK-NEXT: %1 = load
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%1 = load i32, i32* %0, align 4
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%2 = icmp eq i32 5, %1
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br i1 %2, label %Ret, label %Loop.Body
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Ret:
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ret i32 %1
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}
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