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| author | Tanya Lattner <tonic@nondot.org> | 2011-05-17 20:48:40 +0000 |
|---|---|---|
| committer | Tanya Lattner <tonic@nondot.org> | 2011-05-17 20:48:40 +0000 |
| commit | c81c9709ef219809b0d04c55a80a8d18c7194f6a (patch) | |
| tree | 2a7a03212d974b5d02cdacd836afc4e9b1c2ce95 /test/CodeGen/ARM/vrev.ll | |
| parent | de98568bf8adfbfd3c7437c7cdfa617efc7147f3 (diff) | |
vrev is incorrectly defined in the perfect shuffle table. The ordering is backwards (should be 0x3210 versus 0x1032) which exposed a bug when doing a shuffle on a 4xi16. I've attached a test case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131488 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM/vrev.ll')
| -rw-r--r-- | test/CodeGen/ARM/vrev.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/vrev.ll b/test/CodeGen/ARM/vrev.ll index f0f9e4e339..89e222714c 100644 --- a/test/CodeGen/ARM/vrev.ll +++ b/test/CodeGen/ARM/vrev.ll @@ -147,3 +147,20 @@ define void @test_with_vcombine(<4 x float>* %v) nounwind { store <4 x float> %tmp8, <4 x float>* %v, align 16 ret void } + +; Test the shuffle of a 4xi16 which exposed a problem with the perfect shuffle table +; entry for vrev. +define void @test_vrev64(<4 x i16>* nocapture %source, <2 x i16>* nocapture %dst) nounwind ssp { +; CHECK: test_vrev64: +; CHECK: vrev64.16 +; CHECK: vext.16 +entry: + %0 = bitcast <4 x i16>* %source to <8 x i16>* + %tmp2 = load <8 x i16>* %0, align 4 + %tmp3 = extractelement <8 x i16> %tmp2, i32 6 + %tmp5 = insertelement <2 x i16> undef, i16 %tmp3, i32 0 + %tmp9 = extractelement <8 x i16> %tmp2, i32 5 + %tmp11 = insertelement <2 x i16> %tmp5, i16 %tmp9, i32 1 + store <2 x i16> %tmp11, <2 x i16>* %dst, align 4 + ret void +} |