| ; 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. | |
| declare ptr @obscure(ptr) memory(none) | |
| define i8 @test() { | |
| entry: | |
| %P = alloca [32 x i8] | |
| %Q = call ptr @obscure(ptr %P) | |
| ; CHECK: 1 = MemoryDef(liveOnEntry) | |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr %P) | |
| call void @llvm.lifetime.start.p0(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(ptr %P) | |
| call void @llvm.lifetime.end.p0(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(ptr nocapture %P) readonly | |
| declare void @llvm.lifetime.end.p0(ptr nocapture %P) |