| ; 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) |
