[clang] Remove FiniteMathOnly and use only NoHonorINFs and NoHonorNANs. (PR #97342)

[Michael Toguchi via cfe-commits]

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@@ -3298,7 +3298,18 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D,
   }
 
   // Handle __FINITE_MATH_ONLY__ similarly.
-  if (!HonorINFs && !HonorNaNs)
+  bool InfValues = true;
+  bool NanValues = true;
+  auto processArg = [&](const auto *Arg) {
+    if (StringRef(Arg->getValue()) == "-menable-no-nans")
+      NanValues = false;
+    if (StringRef(Arg->getValue()) == "-menable-no-infs")
+      InfValues = false;
+  };
+  for (auto *Arg : Args.filtered(options::OPT_Xclang))
+    processArg(Arg);
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mdtoguchi wrote:

No strong preference - singular addition of `-ffinite-math-only` is easier to maintain.

https://github.com/llvm/llvm-project/pull/97342