[clang] [CLANG] Full support of complex multiplication and division. (PR #81514)

[Andy Kaylor via cfe-commits]

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@@ -794,8 +834,10 @@ ComplexPairTy ComplexExprEmitter::EmitBinMul(const BinOpInfo &Op) {
       ResR = Builder.CreateFSub(AC, BD, "mul_r");
       ResI = Builder.CreateFAdd(AD, BC, "mul_i");
 
-      if (Op.FPFeatures.getComplexRange() == LangOptions::CX_Limited ||
-          Op.FPFeatures.getComplexRange() == LangOptions::CX_Fortran)
+      if (Op.FPFeatures.getComplexRange() == LangOptions::CX_Basic ||
+          Op.FPFeatures.getComplexRange() == LangOptions::CX_Improved ||
+          Op.FPFeatures.getComplexRange() == LangOptions::CX_Promoted ||
+          CGF.getLangOpts().NoHonorInfs || CGF.getLangOpts().NoHonorNaNs)
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andykaylor wrote:

Oh, sorry, for some reason I thought this was invoking the special handling for division. I think the for honor NaNs and infinities still isn't necessary because we'll emit the comparison with the fast-math flags set and the backend will optimize it away, which is what happens today: https://godbolt.org/z/e8EnKodj6

https://github.com/llvm/llvm-project/pull/81514