[llvm] 2d8d2be - [Hexagon] Implement TLI::isExtractSubvectorCheap hook
Krzysztof Parzyszek via llvm-commits
llvm-commits at lists.llvm.org
Wed Oct 12 12:49:10 PDT 2022
Author: Krzysztof Parzyszek
Date: 2022-10-12T12:48:56-07:00
New Revision: 2d8d2bec701b6c1378431d2790e1f50e2a9bb0e3
URL: https://github.com/llvm/llvm-project/commit/2d8d2bec701b6c1378431d2790e1f50e2a9bb0e3
DIFF: https://github.com/llvm/llvm-project/commit/2d8d2bec701b6c1378431d2790e1f50e2a9bb0e3.diff
LOG: [Hexagon] Implement TLI::isExtractSubvectorCheap hook
Added:
Modified:
llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
llvm/lib/Target/Hexagon/HexagonISelLowering.h
Removed:
################################################################################
diff --git a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
index e29fda86141fb..da86291bef381 100644
--- a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
@@ -2141,6 +2141,20 @@ bool HexagonTargetLowering::shouldExpandBuildVectorWithShuffles(EVT VT,
return false;
}
+bool HexagonTargetLowering::isExtractSubvectorCheap(EVT ResVT, EVT SrcVT,
+ unsigned Index) const {
+ assert(ResVT.getVectorElementType() == SrcVT.getVectorElementType());
+ if (!ResVT.isSimple() || !SrcVT.isSimple())
+ return false;
+
+ MVT ResTy = ResVT.getSimpleVT(), SrcTy = SrcVT.getSimpleVT();
+ if (ResTy.getVectorElementType() != MVT::i1)
+ return true;
+
+ // Non-HVX bool vectors are relatively cheap.
+ return SrcTy.getVectorNumElements() <= 8;
+}
+
bool HexagonTargetLowering::isShuffleMaskLegal(ArrayRef<int> Mask,
EVT VT) const {
return true;
diff --git a/llvm/lib/Target/Hexagon/HexagonISelLowering.h b/llvm/lib/Target/Hexagon/HexagonISelLowering.h
index fcd9d282d3c6e..07c6ceadb4e7f 100644
--- a/llvm/lib/Target/Hexagon/HexagonISelLowering.h
+++ b/llvm/lib/Target/Hexagon/HexagonISelLowering.h
@@ -158,6 +158,8 @@ class HexagonTargetLowering : public TargetLowering {
// Should we expand the build vector with shuffles?
bool shouldExpandBuildVectorWithShuffles(EVT VT,
unsigned DefinedValues) const override;
+ bool isExtractSubvectorCheap(EVT ResVT, EVT SrcVT,
+ unsigned Index) const override;
bool isShuffleMaskLegal(ArrayRef<int> Mask, EVT VT) const override;
TargetLoweringBase::LegalizeTypeAction getPreferredVectorAction(MVT VT)
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