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| author | Pete Cooper <peter_cooper@apple.com> | 2012-07-30 20:23:19 +0000 |
|---|---|---|
| committer | Pete Cooper <peter_cooper@apple.com> | 2012-07-30 20:23:19 +0000 |
| commit | 32ecfb41585d377c25c30aa4260cf007c1b0d5ce (patch) | |
| tree | a702eea3de6a7f0ea333d881321ed229d16a8fdf /test/CodeGen/X86/movgs.ll | |
| parent | b7e22efa2b2a66b7d55c0297e45c217a465621ff (diff) | |
| download | llvm-32ecfb41585d377c25c30aa4260cf007c1b0d5ce.tar.gz llvm-32ecfb41585d377c25c30aa4260cf007c1b0d5ce.tar.bz2 llvm-32ecfb41585d377c25c30aa4260cf007c1b0d5ce.tar.xz | |
Consider address spaces for hashing and CSEing DAG nodes. Otherwise two loads from different x86 segments but the same address would get CSEd
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160987 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/movgs.ll')
| -rw-r--r-- | test/CodeGen/X86/movgs.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/CodeGen/X86/movgs.ll b/test/CodeGen/X86/movgs.ll index aeb540fe42..65ee7b1d8e 100644 --- a/test/CodeGen/X86/movgs.ll +++ b/test/CodeGen/X86/movgs.ll @@ -55,4 +55,20 @@ entry: ; X64: ret } +; The two loads here both look identical to selection DAG, except for their +; address spaces. Make sure they aren't CSE'd. +define i32 @test_no_cse() nounwind readonly { +entry: + %tmp = load i32* addrspace(256)* getelementptr (i32* addrspace(256)* inttoptr (i32 72 to i32* addrspace(256)*), i32 31) ; <i32*> [#uses=1] + %tmp1 = load i32* %tmp ; <i32> [#uses=1] + %tmp2 = load i32* addrspace(257)* getelementptr (i32* addrspace(257)* inttoptr (i32 72 to i32* addrspace(257)*), i32 31) ; <i32*> [#uses=1] + %tmp3 = load i32* %tmp2 ; <i32> [#uses=1] + %tmp4 = add i32 %tmp1, %tmp3 + ret i32 %tmp4 +} +; X32: test_no_cse: +; X32: movl %gs:196 +; X32: movl %fs:196 +; X32: ret + declare <4 x i32> @llvm.x86.sse41.pmovsxwd(<8 x i16>) nounwind readnone |