[llvm] [InstSimplify] Optimize maximumnum and minimumnum (PR #139581)

[Matt Arsenault via llvm-commits]

================
@@ -88,6 +152,23 @@ define float @test_minimum_const_inf(float %x) {
   ret float %r
 }
 
+define float @test_maximumnum_const_inf(float %x) {
+; CHECK-LABEL: @test_maximumnum_const_inf(
+; CHECK-NEXT:    ret float 0x7FF0000000000000
+;
+  %r = call float @llvm.maximumnum.f32(float %x, float 0x7ff0000000000000)
+  ret float %r
+}
+
+define float @test_minimumnum_const_inf(float %x) {
+; CHECK-LABEL: @test_minimumnum_const_inf(
+; CHECK-NEXT:    [[R:%.*]] = call float @llvm.minimumnum.f32(float [[X:%.*]], float 0x7FF0000000000000)
+; CHECK-NEXT:    ret float [[R]]
+;
+  %r = call float @llvm.minimumnum.f32(float %x, float 0x7ff0000000000000)
+  ret float %r
+}
+
----------------
arsenm wrote:

Vector cases 

https://github.com/llvm/llvm-project/pull/139581