diff options
author | Tom Stellard <tstellar@redhat.com> | 2018-11-30 04:51:41 +0000 |
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committer | Tom Stellard <tstellar@redhat.com> | 2018-11-30 04:51:41 +0000 |
commit | 6ce2982653757ea76f6b8f573fbd731f0e91b24e (patch) | |
tree | d139626d73fa79a0ea97a7108d8bee3cf5b398ac /llvm/lib/Target/PowerPC/PPCISelLowering.cpp | |
parent | 69ea49fd000b775475d6687419297f4cd9b9fb52 (diff) |
Merging r339260:
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r339260 | syzaara | 2018-08-08 08:20:43 -0700 (Wed, 08 Aug 2018) | 13 lines
[PowerPC] Improve codegen for vector loads using scalar_to_vector
This patch aims to improve the codegen for vector loads involving the
scalar_to_vector (load X) sequence. Initially, ld->mv instructions were used
for scalar_to_vector (load X), so this patch allows scalar_to_vector (load X)
to utilize:
LXSD and LXSDX for i64 and f64
LXSIWAX for i32 (sign extension to i64)
LXSIWZX for i32 and f64
Committing on behalf of Amy Kwan.
Differential Revision: https://reviews.llvm.org/D48950
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Diffstat (limited to 'llvm/lib/Target/PowerPC/PPCISelLowering.cpp')
-rw-r--r-- | llvm/lib/Target/PowerPC/PPCISelLowering.cpp | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp index 331dbcbbe06..b5bdf47ce37 100644 --- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp @@ -8454,17 +8454,6 @@ SDValue PPCTargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, if (V2.isUndef() && PPC::isSplatShuffleMask(SVOp, 4)) { int SplatIdx = PPC::getVSPLTImmediate(SVOp, 4, DAG); - // If the source for the shuffle is a scalar_to_vector that came from a - // 32-bit load, it will have used LXVWSX so we don't need to splat again. - if (Subtarget.hasP9Vector() && - ((isLittleEndian && SplatIdx == 3) || - (!isLittleEndian && SplatIdx == 0))) { - SDValue Src = V1.getOperand(0); - if (Src.getOpcode() == ISD::SCALAR_TO_VECTOR && - Src.getOperand(0).getOpcode() == ISD::LOAD && - Src.getOperand(0).hasOneUse()) - return V1; - } SDValue Conv = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, V1); SDValue Splat = DAG.getNode(PPCISD::XXSPLT, dl, MVT::v4i32, Conv, DAG.getConstant(SplatIdx, dl, MVT::i32)); |