[llvm] [AArch64][Codegen]Transform saturating smull to sqdmulh (PR #143671)

[David Green via llvm-commits]

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@@ -9365,6 +9366,18 @@ def : Pat<(v4i32 (mulhu V128:$Rn, V128:$Rm)),
                              (EXTRACT_SUBREG V128:$Rm, dsub)),
            (UMULLv4i32_v2i64 V128:$Rn, V128:$Rm))>;
 
+def : Pat<(v4i16 (AArch64sqdmulh (v4i16 V64:$Rn), (v4i16 V64:$Rm))),
+          (SQDMULHv4i16 V64:$Rn, V64:$Rm)>;
+
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davemgreen wrote:

Can remove newlines between patterns

https://github.com/llvm/llvm-project/pull/143671