[llvm] [PowerPC] cost modeling for length type VP intrinsic load/store (PR #168938)

[via llvm-commits]

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@@ -1078,3 +1082,61 @@ PPCTTIImpl::getVPLegalizationStrategy(const VPIntrinsic &PI) const {
 
   return VPLegalization(VPLegalization::Legal, VPLegalization::Legal);
 }
+
+bool PPCTTIImpl::hasActiveVectorLength() const {
+  unsigned CPU = ST->getCPUDirective();
+  if (!PPCEVL)
+    return false;
+  if (CPU == PPC::DIR_PWR10 || CPU == PPC::DIR_PWR_FUTURE ||
+      (Pwr9EVL && CPU == PPC::DIR_PWR9))
+    return true;
+  return false;
+}
+
+static inline bool isLegalLoadWithLengthType(EVT VT) {
+  if (VT != MVT::i64 && VT != MVT::i32 && VT != MVT::i16 && VT != MVT::i8)
+    return false;
+  return true;
+}
+
+bool PPCTTIImpl::isLegalMaskedLoad(Type *DataType, Align Alignment,
+                                   unsigned AddressSpace) const {
+  if (!hasActiveVectorLength())
+    return false;
+  if (!isLegalLoadWithLengthType(TLI->getValueType(DL, DataType, true)))
+    return false;
+  return true;
+}
+
+bool PPCTTIImpl::isLegalMaskedStore(Type *DataType, Align Alignment,
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RolandF77 wrote:

It is exposed to external users. It is conceptually used in the patch through getMaskedMemoryOpCost but since it is currently the same as for load I didn't differentiate. I guess I can make this clearer by calling both from there.

https://github.com/llvm/llvm-project/pull/168938