RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-10-19 02:52:53 +02:00
Code Issues Projects Releases Wiki Activity

[X86][AVX] canonicalizeLaneShuffleWithRepeatedOps - remove unnecessary BITCASTs.

Browse Source 
In conjunction with the 'vperm2x128(bitcast(x),bitcast(y),c) -> bitcast(vperm2x128(x,y,c))' fold in combineTargetShuffle, this should remove any unnecessary bitcasts around vperm2x128 lane shuffles.
This commit is contained in:
Simon Pilgrim 2021-02-21 18:40:23 +00:00
parent c582e6ee1c
commit 19966fb2bc
1 changed files with 9 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
lib/Target/X86/X86ISelLowering.cpp
View File

@ -36944,12 +36944,11 @@ static SDValue canonicalizeLaneShuffleWithRepeatedOps(SDValue V,
switch (SrcOpc0) {
case X86ISD::MOVDDUP: {
SDValue LHS = DAG.getBitcast(VT, Src0.getOperand(0));
SDValue RHS =
DAG.getBitcast(VT, Src1.isUndef() ? Src1 : Src1.getOperand(0));
SDValue LHS = Src0.getOperand(0);
SDValue RHS = Src1.isUndef() ? Src1 : Src1.getOperand(0);
SDValue Res =
DAG.getNode(X86ISD::VPERM2X128, DL, VT, LHS, RHS, V.getOperand(2));
Res = DAG.getNode(SrcOpc0, DL, SrcVT0, DAG.getBitcast(SrcVT0, Res));
DAG.getNode(X86ISD::VPERM2X128, DL, SrcVT0, LHS, RHS, V.getOperand(2));
Res = DAG.getNode(SrcOpc0, DL, SrcVT0, Res);
return DAG.getBitcast(VT, Res);
}
case X86ISD::VPERMILPI:
@ -36965,13 +36964,11 @@ static SDValue canonicalizeLaneShuffleWithRepeatedOps(SDValue V,
case X86ISD::VSRAI:
case X86ISD::PSHUFD:
if (Src1.isUndef() || Src0.getOperand(1) == Src1.getOperand(1)) {
SDValue LHS = DAG.getBitcast(VT, Src0.getOperand(0));
SDValue RHS =
DAG.getBitcast(VT, Src1.isUndef() ? Src1 : Src1.getOperand(0));
SDValue Res =
DAG.getNode(X86ISD::VPERM2X128, DL, VT, LHS, RHS, V.getOperand(2));
Res = DAG.getNode(SrcOpc0, DL, SrcVT0, DAG.getBitcast(SrcVT0, Res),
Src0.getOperand(1));
SDValue LHS = Src0.getOperand(0);
SDValue RHS = Src1.isUndef() ? Src1 : Src1.getOperand(0);
SDValue Res = DAG.getNode(X86ISD::VPERM2X128, DL, SrcVT0, LHS, RHS,
V.getOperand(2));
Res = DAG.getNode(SrcOpc0, DL, SrcVT0, Res, Src0.getOperand(1));
return DAG.getBitcast(VT, Res);
}
break;