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Fix the test: DCE optimized away everything.

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Use volatile store to protect the generated PTX from DCE.

Patch by Jingyue Wu.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206763 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Bendersky 2014-04-21 17:23:12 +00:00
parent 7e0b3fbae9
commit 85af3e7445
1 changed files with 9 additions and 9 deletions
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18
test/CodeGen/NVPTX/local-stack-frame.ll
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@ -3,16 +3,16 @@
; Ensure we access the local stack properly
; PTX32: mov.u32 %r{{[0-9]+}}, __local_depot{{[0-9]+}};
; PTX32: cvta.local.u32 %SP, %r{{[0-9]+}};
; PTX32: ld.param.u32 %r{{[0-9]+}}, [foo_param_0];
; PTX32: st.u32 [%SP+0], %r{{[0-9]+}};
; PTX64: mov.u64 %rl{{[0-9]+}}, __local_depot{{[0-9]+}};
; PTX64: cvta.local.u64 %SP, %rl{{[0-9]+}};
; PTX64: ld.param.u32 %r{{[0-9]+}}, [foo_param_0];
; PTX64: st.u32 [%SP+0], %r{{[0-9]+}};
; PTX32: mov.u32 %r{{[0-9]+}}, __local_depot{{[0-9]+}};
; PTX32: cvta.local.u32 %SP, %r{{[0-9]+}};
; PTX32: ld.param.u32 %r{{[0-9]+}}, [foo_param_0];
; PTX32: st.volatile.u32 [%SP+0], %r{{[0-9]+}};
; PTX64: mov.u64 %rl{{[0-9]+}}, __local_depot{{[0-9]+}};
; PTX64: cvta.local.u64 %SP, %rl{{[0-9]+}};
; PTX64: ld.param.u32 %r{{[0-9]+}}, [foo_param_0];
; PTX64: st.volatile.u32 [%SP+0], %r{{[0-9]+}};
define void @foo(i32 %a) {
%local = alloca i32, align 4
store i32 %a, i32* %local
store volatile i32 %a, i32* %local
ret void
}