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Fix the test: DCE optimized away everything. 

Use volatile store to protect the generated PTX from DCE.

Patch by Jingyue Wu.

llvm-svn: 206763
This commit is contained in:
Eli Bendersky 2014-04-21 17:23:12 +00:00
parent 5d66da70d8
commit 7cd70df708
1 changed files with 9 additions and 9 deletions
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18
llvm/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
}