29 lines
1.0 KiB
LLVM
29 lines
1.0 KiB
LLVM
; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
|
|
; This test checks that lifetime markers are considered clobbers of %P,
|
|
; and due to lack of noalias information, of %Q as well.
|
|
|
|
define i8 @test(ptr %P, ptr %Q) {
|
|
entry:
|
|
; CHECK: 1 = MemoryDef(liveOnEntry)
|
|
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 32, ptr %P)
|
|
call void @llvm.lifetime.start.p0(i64 32, ptr %P)
|
|
; CHECK: MemoryUse(1)
|
|
; CHECK-NEXT: %0 = load i8, ptr %P
|
|
%0 = load i8, ptr %P
|
|
; CHECK: 2 = MemoryDef(1)
|
|
; CHECK-NEXT: store i8 1, ptr %P
|
|
store i8 1, ptr %P
|
|
; CHECK: 3 = MemoryDef(2)
|
|
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 32, ptr %P)
|
|
call void @llvm.lifetime.end.p0(i64 32, ptr %P)
|
|
; CHECK: MemoryUse(3)
|
|
; CHECK-NEXT: %1 = load i8, ptr %P
|
|
%1 = load i8, ptr %P
|
|
; CHECK: MemoryUse(3)
|
|
; CHECK-NEXT: %2 = load i8, ptr %Q
|
|
%2 = load i8, ptr %Q
|
|
ret i8 %1
|
|
}
|
|
declare void @llvm.lifetime.start.p0(i64 %S, ptr nocapture %P) readonly
|
|
declare void @llvm.lifetime.end.p0(i64 %S, ptr nocapture %P)
|