forked from OSchip/llvm-project
30 lines
887 B
LLVM
30 lines
887 B
LLVM
|
; 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
|
||
|
|
%x.0.x.0..sroa_cast = bitcast i32* %x to i8*
|
||
|
|
call void @llvm.lifetime.start(i64 4, i8* %x.0.x.0..sroa_cast)
|
||
|
|
store volatile i32 0, i32* %x, align 4
|
||
|
|
%call = tail call i32 bitcast (i32 (...)* @bar to i32 ()*)() #0
|
||
|
|
%x.0.x.0. = load volatile i32, i32* %x, align 4
|
||
|
|
%add = add nsw i32 %x.0.x.0., %a
|
||
|
|
call void @llvm.lifetime.end(i64 4, i8* %x.0.x.0..sroa_cast)
|
||
|
|
ret i32 %add
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @llvm.lifetime.start(i64, i8* nocapture) #1
|
||
|
|
declare void @llvm.lifetime.end(i64, i8* nocapture) #1
|
||
|
|
|
||
|
|
declare i32 @bar(...) #0
|
||
|
|
|
||
|
|
attributes #0 = { nounwind }
|
||
|
|
attributes #1 = { argmemonly nounwind }
|