[TTI] Fix -Wsign-compare in BasicTTIImpl.h (NFC)

DamonFool · DamonFool · commit 7e77f1923288 · 2023-10-06T20:08:51.000+08:00
/llvm-project/llvm/include/llvm/CodeGen/BasicTTIImpl.h:948:33: error: comparison of integers of different signs: 'size_t' (aka 'unsigned long') and 'int' [-Werror,-Wsign-compare]
          (Index + Mask.size()) &lt;= NumSrcElts) {
           ~~~~~~~~~~~~~~~~~~~  ^  ~~~~~~~~~~
diff --git a/llvm/include/llvm/CodeGen/BasicTTIImpl.h b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
@@ -945,7 +945,7 @@ class BasicTTIImplBase : public TargetTransformInfoImplCRTPBase<T> {
       if (ShuffleVectorInst::isZeroEltSplatMask(Mask, NumSrcElts))
         return TTI::SK_Broadcast;
       if (ShuffleVectorInst::isExtractSubvectorMask(Mask, NumSrcElts, Index) &&
-          (Index + Mask.size()) <= NumSrcElts) {
+          (Index + Mask.size()) <= (size_t)NumSrcElts) {
         SubTy = FixedVectorType::get(Ty->getElementType(), Mask.size());
         return TTI::SK_ExtractSubvector;
       }

Original file line number	Diff line number	Diff line change
`@@ -945,7 +945,7 @@ class BasicTTIImplBase : public TargetTransformInfoImplCRTPBase<T> {`
`945`	`945`	`if (ShuffleVectorInst::isZeroEltSplatMask(Mask, NumSrcElts))`
`946`	`946`	`return TTI::SK_Broadcast;`
`947`	`947`	`if (ShuffleVectorInst::isExtractSubvectorMask(Mask, NumSrcElts, Index) &&`
`948`		`- (Index + Mask.size()) <= NumSrcElts) {`
	`948`	`+ (Index + Mask.size()) <= (size_t)NumSrcElts) {`
`949`	`949`	`SubTy = FixedVectorType::get(Ty->getElementType(), Mask.size());`
`950`	`950`	`return TTI::SK_ExtractSubvector;`
`951`	`951`	`}`