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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-02-24 19:28:34 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-02-24 19:28:34 +0000 |
| commit | c0dbdb86c35f2d7d57e88090799759a9ec7a2157 (patch) | |
| tree | 3f42f5060529e57a1281cd4739723e9926aba9ea | |
| parent | a6f81007886ce412021f229b07f113512b4cd57b (diff) | |
| download | bcm5719-llvm-c0dbdb86c35f2d7d57e88090799759a9ec7a2157.tar.gz bcm5719-llvm-c0dbdb86c35f2d7d57e88090799759a9ec7a2157.zip | |
[TargetLowering] SimplifyDemandedVectorElts - pass demanded elts through TRUNCATE ops
llvm-svn: 326043
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 5 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/vector-trunc.ll | 27 |
2 files changed, 10 insertions, 22 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index d1e524531cb..36cb2cd963a 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -1536,6 +1536,11 @@ bool TargetLowering::SimplifyDemandedVectorElts( } break; } + case ISD::TRUNCATE: + if (SimplifyDemandedVectorElts(Op.getOperand(0), DemandedElts, KnownUndef, + KnownZero, TLO, Depth + 1)) + return true; + break; default: { if (Op.getOpcode() >= ISD::BUILTIN_OP_END) if (SimplifyDemandedVectorEltsForTargetNode(Op, DemandedElts, KnownUndef, diff --git a/llvm/test/CodeGen/X86/vector-trunc.ll b/llvm/test/CodeGen/X86/vector-trunc.ll index dca9ca452af..36818a6294e 100644 --- a/llvm/test/CodeGen/X86/vector-trunc.ll +++ b/llvm/test/CodeGen/X86/vector-trunc.ll @@ -1869,28 +1869,11 @@ entry: } define <8 x i16> @PR32160(<8 x i32> %x) { -; SSE2-LABEL: PR32160: -; SSE2: # %bb.0: -; SSE2-NEXT: pslld $16, %xmm1 -; SSE2-NEXT: psrad $16, %xmm1 -; SSE2-NEXT: pslld $16, %xmm0 -; SSE2-NEXT: psrad $16, %xmm0 -; SSE2-NEXT: packssdw %xmm1, %xmm0 -; SSE2-NEXT: pshuflw {{.*#+}} xmm0 = xmm0[2,2,2,3,4,5,6,7] -; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,0,0,0] -; SSE2-NEXT: retq -; -; SSSE3-LABEL: PR32160: -; SSSE3: # %bb.0: -; SSSE3-NEXT: pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,4,4,6,7] -; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,2,2,2] -; SSSE3-NEXT: retq -; -; SSE41-LABEL: PR32160: -; SSE41: # %bb.0: -; SSE41-NEXT: pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,4,4,6,7] -; SSE41-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,2,2,2] -; SSE41-NEXT: retq +; SSE-LABEL: PR32160: +; SSE: # %bb.0: +; SSE-NEXT: pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,4,4,6,7] +; SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,2,2,2] +; SSE-NEXT: retq ; ; AVX1-LABEL: PR32160: ; AVX1: # %bb.0: |
