| ; XFAIL: * |
| ; 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 |
| ; |
| ; Invariant loads should be considered live on entry, because, once the |
| ; location is known to be dereferenceable, the value can never change. |
| ; |
| ; Currently XFAILed because this optimization was held back from the initial |
| ; commit. |
| |
| @g = external global i32 |
| |
| declare void @clobberAllTheThings() |
| |
| define i32 @foo() { |
| ; CHECK: 1 = MemoryDef(liveOnEntry) |
| ; CHECK-NEXT: call void @clobberAllTheThings() |
| call void @clobberAllTheThings() |
| ; CHECK: MemoryUse(liveOnEntry) |
| ; CHECK-NEXT: %1 = load i32 |
| %1 = load i32, i32* @g, align 4, !invariant.load !0 |
| ret i32 %1 |
| } |
| |
| !0 = !{} |
