[InferAttrs] Handle f[min/max]imum_num like other libm functions (llvm#170697)

These behave like fmin and fmax.

Author: valadaptive

llvm/lib/Transforms/Utils/BuildLibCalls.cpp

@@ -1353,6 +1353,12 @@ bool llvm::inferNonMandatoryLibFuncAttrs(Function &F,
   case LibFunc_fmin:
   case LibFunc_fminf:
   case LibFunc_fminl:
+  case LibFunc_fmaximum_num:
+  case LibFunc_fmaximum_numf:
+  case LibFunc_fmaximum_numl:
+  case LibFunc_fminimum_num:
+  case LibFunc_fminimum_numf:
+  case LibFunc_fminimum_numl:
   case LibFunc_labs:
   case LibFunc_llabs:
   case LibFunc_nearbyint:

llvm/test/Transforms/InferFunctionAttrs/annotate.ll

@@ -473,6 +473,24 @@ declare float @fminf(float, float)
 ; CHECK: declare x86_fp80 @fminl(x86_fp80, x86_fp80) [[MEMNONE_NOFREE_NOUNWIND_WILLRETURN:#[0-9]+]]
 declare x86_fp80 @fminl(x86_fp80, x86_fp80)
 
+; CHECK: declare double @fmaximum_num(double, double) [[MEMNONE_NOFREE_NOUNWIND_WILLRETURN:#[0-9]+]]
+declare double @fmaximum_num(double, double)
+
+; CHECK: declare float @fmaximum_numf(float, float) [[MEMNONE_NOFREE_NOUNWIND_WILLRETURN:#[0-9]+]]
+declare float @fmaximum_numf(float, float)
+
+; CHECK: declare x86_fp80 @fmaximum_numl(x86_fp80, x86_fp80) [[MEMNONE_NOFREE_NOUNWIND_WILLRETURN:#[0-9]+]]
+declare x86_fp80 @fmaximum_numl(x86_fp80, x86_fp80)
+
+; CHECK: declare double @fminimum_num(double, double) [[MEMNONE_NOFREE_NOUNWIND_WILLRETURN:#[0-9]+]]
+declare double @fminimum_num(double, double)
+
+; CHECK: declare float @fminimum_numf(float, float) [[MEMNONE_NOFREE_NOUNWIND_WILLRETURN:#[0-9]+]]
+declare float @fminimum_numf(float, float)
+
+; CHECK: declare x86_fp80 @fminimum_numl(x86_fp80, x86_fp80) [[MEMNONE_NOFREE_NOUNWIND_WILLRETURN:#[0-9]+]]
+declare x86_fp80 @fminimum_numl(x86_fp80, x86_fp80)
+
 ; CHECK: declare double @fmod(double, double) [[ERRNOMEMONLY_NOFREE_NOUNWIND_WILLRETURN:#[0-9]+]]
 declare double @fmod(double, double)