55 lines
1.4 KiB
LLVM
55 lines
1.4 KiB
LLVM
; RUN: opt -basicaa -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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; Ensuring that external functions without attributes are MemoryDefs
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@g = external global i32
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declare void @modifyG()
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define i32 @foo() {
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; CHECK: MemoryUse(liveOnEntry)
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; CHECK-NEXT: %1 = load i32
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%1 = load i32, i32* @g
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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* @g, align 4
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: call void @modifyG()
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call void @modifyG()
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %2 = load i32
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%2 = load i32, i32* @g
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%3 = add i32 %2, %1
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ret i32 %3
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}
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declare void @readEverything() readonly
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declare void @clobberEverything()
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; CHECK-LABEL: define void @bar
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define void @bar() {
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: call void @clobberEverything()
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call void @clobberEverything()
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br i1 undef, label %if.end, label %if.then
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if.then:
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: call void @readEverything()
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call void @readEverything()
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: call void @clobberEverything()
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call void @clobberEverything()
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br label %if.end
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if.end:
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; CHECK: 3 = MemoryPhi({%0,1},{if.then,2})
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; CHECK: MemoryUse(3)
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; CHECK-NEXT: call void @readEverything()
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call void @readEverything()
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ret void
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}
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