[clang] [clang] Make -fveclib={ArmPL, SLEEF} imply -fno-math-errno (PR #112580)

[Maciej Gabka via cfe-commits]

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@@ -3125,6 +3129,10 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D,
       TrappingMathPresent = true;
       FPExceptionBehavior = "strict";
       break;
+    case options::OPT_fveclib:
+      if (llvm::is_contained(VecLibImpliesNoMathErrno, A->getValue()))
+        MathErrno = false;
+      break;
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mgabka wrote:

I don't thinks so, these 2 libraries are stating clearly that they do not honour errno regardless of the platform. Well in ArmPL case is supports only Arm, but SLEEF could work on other targets if the right mappings were added to LLVM.

https://github.com/llvm/llvm-project/pull/112580