[llvm] [InstCombine] Fold `fpto{s|u}i non-norm` to zero (PR #85569)

[Matt Arsenault via llvm-commits]

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@@ -347,3 +347,64 @@ define double @masked_uint_to_fpext3(i32 %x) {
   %r = fpext float %f to double
   ret double %r
 }
+
+define i32 @fptosi_nonnorm(float nofpclass(norm) %x) {
+; CHECK-LABEL: @fptosi_nonnorm(
+; CHECK-NEXT:    ret i32 0
+;
+  %ret = fptosi float %x to i32
+  ret i32 %ret
+}
+
+define i32 @fptoui_nonnorm(float nofpclass(pnorm) %x) {
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arsenm wrote:

check a nnorm source for ui/si 

https://github.com/llvm/llvm-project/pull/85569