[llvm] [X86] Fix commuteSelect miscompile with double-used condition value (PR #219436)

[Timur Golubovich via llvm-commits]

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@@ -52,3 +52,70 @@ exit:
   store <16 x float> %res_max, ptr %pMax, align 64
   ret void
 }
+
+; Verify that commuteSelect does not miscompile when the inverted setcc already
+; exists (CSE). Both icmp eq and icmp ne are present so getSetCCInverse must
+; not create an infinite loop or corrupt operands.
+
+define <8 x i32> @commute_select_existing_inverse_cmp(<8 x i32> %src) {
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timurgol007 wrote:

@RKSimon, addressed

https://github.com/llvm/llvm-project/pull/219436