[flang-commits] [clang] [flang] [flang] Add -fcomplex-arithmetic= option and select complex division algorithm (PR #146641)

[Kiran Chandramohan via flang-commits]

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@@ -1066,8 +1066,16 @@ struct BinaryOp<Fortran::evaluate::Divide<
     mlir::Type ty = Fortran::lower::getFIRType(
         builder.getContext(), Fortran::common::TypeCategory::Complex, KIND,
         /*params=*/{});
-    return hlfir::EntityWithAttributes{
-        fir::genDivC(builder, loc, ty, lhs, rhs)};
+
+    // TODO: Ideally, complex number division operations should always be
+    // lowered to MLIR. However, converting them to the runtime via MLIR causes
+    // ABI issues.
+    if (builder.getComplexDivisionToRuntimeFlag())
+      return hlfir::EntityWithAttributes{
+          fir::genDivC(builder, loc, ty, lhs, rhs)};
+    else
+      return hlfir::EntityWithAttributes{
+          builder.create<mlir::complex::DivOp>(loc, lhs, rhs)};
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kiranchandramohan wrote:

Nit: braces

https://github.com/llvm/llvm-project/pull/146641