[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:

I'm not sure NoHonorInfs or NoHonorNaNs should be checked here. Given that we have explicit control for complex arithmetic behavior, maybe that should take precedence. That seems to be the way gcc handles it: https://godbolt.org/z/1oGo7jznz

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