[llvm] [IR] Add llvm `clmul` intrinsic (PR #140301)

[Craig Topper via llvm-commits]

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@@ -8153,12 +8153,12 @@ SDValue TargetLowering::expandCLMUL(SDNode *Node,
   SDValue Res = DAG.getConstant(0, DL, VT);
   SDValue Zero = DAG.getConstant(0, DL, VT);
   SDValue One = DAG.getConstant(1, DL, VT);
-  for (unsigned I = 0; I < NumBitsPerElt-1; ++I) {
+  for (unsigned I = 0; I < NumBitsPerElt; ++I) {
     SDValue LowBit = DAG.getNode(ISD::AND, DL, VT, V1, One);
     SDValue LowBool = DAG.getSetCC(DL, SetCCType, LowBit, Zero, ISD::SETNE);
     SDValue Pred = DAG.getNode(ISD::SELECT, DL, VT, LowBool, V2, Zero);
     Res = DAG.getNode(ISD::XOR, DL, VT, Res, Pred);
-    if (I != NumBitsPerElt) {
+    if (I != NumBitsPerElt-1) {
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topperc wrote:

clang-format will want spaces around the `-`

https://github.com/llvm/llvm-project/pull/140301