| ; RUN: opt -basicaa -print-memoryssa -verify-memoryssa -analyze < %s 2>&1 | FileCheck %s |
| ; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s |
| ; This test checks a number of things: |
| ; First, the lifetime markers should not clobber any uses of Q or P. |
| ; Second, the loads of P are MemoryUse(LiveOnEntry) due to the placement of the markers vs the loads. |
| |
| define i8 @test(i8* %P, i8* %Q) { |
| entry: |
| ; CHECK: 1 = MemoryDef(liveOnEntry) |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 32, i8* %P) |
| call void @llvm.lifetime.start.p0i8(i64 32, i8* %P) |
| ; CHECK: MemoryUse(1) |
| ; CHECK-NEXT: %0 = load i8, i8* %P |
| %0 = load i8, i8* %P |
| ; CHECK: 2 = MemoryDef(1) |
| ; CHECK-NEXT: store i8 1, i8* %P |
| store i8 1, i8* %P |
| ; CHECK: 3 = MemoryDef(2) |
| ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 32, i8* %P) |
| call void @llvm.lifetime.end.p0i8(i64 32, i8* %P) |
| ; CHECK: MemoryUse(liveOnEntry) |
| ; CHECK-NEXT: %1 = load i8, i8* %P |
| %1 = load i8, i8* %P |
| ; CHECK: MemoryUse(2) |
| ; CHECK-NEXT: %2 = load i8, i8* %Q |
| %2 = load i8, i8* %Q |
| ret i8 %1 |
| } |
| declare void @llvm.lifetime.start.p0i8(i64 %S, i8* nocapture %P) readonly |
| declare void @llvm.lifetime.end.p0i8(i64 %S, i8* nocapture %P) |
