[llvm] [InstCombine] Fold more 'fcmp' 'select' instrs idioms into 'fabs' (PR #83381)

[Andy Kaylor via llvm-commits]

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@@ -547,6 +547,20 @@ define double @select_fcmp_nnan_nsz_ult_zero_unary_fneg(double %x) {
   ret double %fabs
 }
 
+
+define float @absfloat32f_olt_fast_no_signed_zeroes(float %x) "no-signed-zeros-fp-math" {
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andykaylor wrote:

If there aren't already test cases showing that this won't happen without the function attribute, can you add them?

https://github.com/llvm/llvm-project/pull/83381