[llvm] [X86] Add APX imulzu support. (PR #116806)

[Daniel Zabawa via llvm-commits]

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@@ -2184,17 +2184,43 @@ multiclass EFLAGSDefiningPats<string suffix, Predicate p> {
 defm : EFLAGSDefiningPats<"", NoNDD>;
 defm : EFLAGSDefiningPats<"_ND", HasNDD>;
 
+let Predicates = [HasZU] in {
+  // zext (mul reg/mem, imm) -> imulzu
+  def : Pat<(i32 (zext (i16 (mul GR16:$src1, imm:$src2)))),
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daniel-zabawa wrote:

There were no existing i8 patterns, so I did not add any new i8 patterns for this change.

https://github.com/llvm/llvm-project/pull/116806