20 lines
610 B
LLVM
20 lines
610 B
LLVM
; RUN: opt -basicaa -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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; Ensures that assumes are treated as not reading or writing memory.
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declare void @llvm.assume(i1)
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define i32 @foo(i32* %a, i32* %b, i1 %c) {
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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* %a, align 4
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; CHECK-NOT: MemoryDef
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; CHECK: call void @llvm.assume
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call void @llvm.assume(i1 %c)
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: %1 = load i32
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%1 = load i32, i32* %a, align 4
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ret i32 %1
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}
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