[llvm] [X86] ICMP EQ/NE MIN_SIGNED_INT - avoid immediate argument by using NEG + SETO/SETNO (PR #94948)

[Shengchen Kan via llvm-commits]

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@@ -954,15 +955,16 @@ entry:
 define i1 @not_is_minus_zero_f(float %x) {
 ; CHECK-32-LABEL: not_is_minus_zero_f:
 ; CHECK-32:       # %bb.0: # %entry
-; CHECK-32-NEXT:    cmpl $-2147483648, {{[0-9]+}}(%esp) # imm = 0x80000000
-; CHECK-32-NEXT:    setne %al
+; CHECK-32-NEXT:    xorl %eax, %eax
+; CHECK-32-NEXT:    cmpl {{[0-9]+}}(%esp), %eax
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KanRobert wrote:

I think this can be a `negl {{[0-9]+}}(%esp), %eax` when NDD is available.

https://github.com/llvm/llvm-project/pull/94948