| ; RUN: llc -march=hexagon < %s | FileCheck %s |
| ; Check that the load/store to the volatile stack object has not been |
| ; optimized away. |
| |
| target triple = "hexagon" |
| |
| ; CHECK-LABEL: foo |
| ; CHECK: memw(r29+#4) = |
| ; CHECK: = memw(r29+#4) |
| define i32 @foo(i32 %a) #0 { |
| entry: |
| %x = alloca i32, align 4 |
| call void @llvm.lifetime.start.p0(i64 4, ptr %x) |
| store volatile i32 0, ptr %x, align 4 |
| %call = tail call i32 @bar() #0 |
| %x.0.x.0. = load volatile i32, ptr %x, align 4 |
| %add = add nsw i32 %x.0.x.0., %a |
| call void @llvm.lifetime.end.p0(i64 4, ptr %x) |
| ret i32 %add |
| } |
| |
| declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1 |
| declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1 |
| |
| declare i32 @bar(...) #0 |
| |
| attributes #0 = { nounwind } |
| attributes #1 = { argmemonly nounwind } |
