[clang] [llvm] Clang: emit llvm.minnum and llvm.maxnum with nsz always (PR #113133)

[Matt Arsenault via cfe-commits]

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@@ -2858,10 +2862,13 @@ RValue CodeGenFunction::EmitBuiltinExpr(const GlobalDecl GD, unsigned BuiltinID,
     case Builtin::BI__builtin_fminf:
     case Builtin::BI__builtin_fminf16:
     case Builtin::BI__builtin_fminl:
-    case Builtin::BI__builtin_fminf128:
-      return RValue::get(emitBinaryMaybeConstrainedFPBuiltin(*this, E,
-                                   Intrinsic::minnum,
-                                   Intrinsic::experimental_constrained_minnum));
+    case Builtin::BI__builtin_fminf128: {
+      llvm::FastMathFlags FMF;
+      FMF.setNoSignedZeros();
+      return RValue::get(emitBinaryMaybeConstrainedFPBuiltin(
+          *this, E, Intrinsic::minnum,
+          Intrinsic::experimental_constrained_minnum, &FMF));
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arsenm wrote:

Need to test the strictfp cases 

https://github.com/llvm/llvm-project/pull/113133