derek.holloway
7502bf64a4
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40 lines
1.1 KiB
LLVM
40 lines
1.1 KiB
LLVM
; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>' -verify-memoryssa < %s 2>&1 | FileCheck %s
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;
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; Things that BasicAA can prove points to constant memory should be
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; liveOnEntry, as well.
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declare void @clobberAllTheThings()
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@str = private unnamed_addr constant [2 x i8] c"hi"
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define i8 @foo() {
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: call void @clobberAllTheThings()
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call void @clobberAllTheThings()
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; CHECK: MemoryUse(liveOnEntry)
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; CHECK-NEXT: %1 = load i8
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%1 = load i8, ptr @str, align 1
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%2 = getelementptr [2 x i8], ptr @str, i64 0, i64 1
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; CHECK: MemoryUse(liveOnEntry)
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; CHECK-NEXT: %3 = load i8
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%3 = load i8, ptr %2, align 1
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%4 = add i8 %1, %3
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ret i8 %4
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}
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define i8 @select(i1 %b) {
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%1 = alloca i8, align 1
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i8 0
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store i8 0, ptr %1, align 1
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: call void @clobberAllTheThings()
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call void @clobberAllTheThings()
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%2 = select i1 %b, ptr @str, ptr %1
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %3 = load i8
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%3 = load i8, ptr %2, align 1
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ret i8 %3
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}
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