[llvm] 4dcc0d1 - [CodeGen][SVE] Avoid scalarizing zero splat stores on scalable vectors.
Danilo C. Grael via llvm-commits
llvm-commits at lists.llvm.org
Tue Jun 9 09:53:21 PDT 2020
Author: Henry Kao
Date: 2020-06-09T12:52:39-04:00
New Revision: 4dcc0d1958f8eab1a05ca545ff3935d5b487cbbe
URL: https://github.com/llvm/llvm-project/commit/4dcc0d1958f8eab1a05ca545ff3935d5b487cbbe
DIFF: https://github.com/llvm/llvm-project/commit/4dcc0d1958f8eab1a05ca545ff3935d5b487cbbe.diff
LOG: [CodeGen][SVE] Avoid scalarizing zero splat stores on scalable vectors.
Summary: Implemented in replaceZeroVectorStore(). Fixes several warnings in AArch64 SVE unit tests.
Reviewers: sdesmalen, kmclaughlin, dancgr, efriedma, each, andwar, rengolin
Reviewed By: sdesmalen
Subscribers: tschuett, kristof.beyls, hiraditya, rkruppe, psnobl, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D80824
Added:
Modified:
llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
Removed:
################################################################################
diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
index a3fec1da68b9..86712098f910 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -12069,6 +12069,10 @@ static SDValue replaceZeroVectorStore(SelectionDAG &DAG, StoreSDNode &St) {
SDValue StVal = St.getValue();
EVT VT = StVal.getValueType();
+ // Avoid scalarizing zero splat stores for scalable vectors.
+ if (VT.isScalableVector())
+ return SDValue();
+
// It is beneficial to scalarize a zero splat store for 2 or 3 i64 elements or
// 2, 3 or 4 i32 elements.
int NumVecElts = VT.getVectorNumElements();
More information about the llvm-commits
mailing list