Magic-Mirror/llvm-capstone
1
0
Fork 0
mirror of https://github.com/capstone-engine/llvm-capstone.git synced 2025-03-05 17:08:17 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[X86][AVX] combineInsertSubvector - remove concat_vectors(load(x),load(x)) --> sub_vbroadcast(x)

Browse Source 
D58053/rL354340 added this to EltsFromConsecutiveLoads directly

llvm-svn: 354732
This commit is contained in:
Simon Pilgrim 2019-02-23 18:53:03 +00:00
parent 398d0b9e96
commit f383a47b7d
1 changed files with 0 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -41949,11 +41949,6 @@ static SDValue combineInsertSubvector(SDNode *N, SelectionDAG &DAG,
return Ld;
}
}
// If lower/upper loads are the same and there's no other use of the lower
// load, then splat the loaded value with a broadcast.
if (auto *Ld = dyn_cast<LoadSDNode>(peekThroughOneUseBitcasts(SubVec2)))
if (SubVec2 == SubVec && ISD::isNormalLoad(Ld) && Vec.hasOneUse())
return DAG.getNode(X86ISD::SUBV_BROADCAST, dl, OpVT, SubVec);
// If this broadcast/subv_broadcast is inserted into both halves, use a
// larger broadcast/subv_broadcast.