[Mlir-commits] [clang] [llvm] [mlir] Remove the `x86_mmx` IR type. (PR #98505)

[James Y Knight]

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@@ -57594,6 +57599,86 @@ static SDValue combinePDEP(SDNode *N, SelectionDAG &DAG,
   return SDValue();
 }
 
+// Fixup the MMX intrinsics' types: in IR they are expressed with <1 x i64>,
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jyknight wrote:

No -- the problem is that DAGtoDAG is after LegalizeTypes, and v1i64 is not a legal type. LegalizeTypes can't do anything to legalize the vector type arg to an intrinsic, so we need to fix the operand/result types of the intrinsic first, before LegalizeTypes sees it.

https://github.com/llvm/llvm-project/pull/98505