[clang] [Clang][Sema] Fix -Whigher-precision-for-complex-division (PR #131477)

[Zahira Ammarguellat via cfe-commits]

=?utf-8?q?Mészáros?= Gergely <maetveis at gmail.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/131477 at github.com>


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@@ -10591,6 +10591,45 @@ static void checkArithmeticNull(Sema &S, ExprResult &LHS, ExprResult &RHS,
       << LHS.get()->getSourceRange() << RHS.get()->getSourceRange();
 }
 
+static void DetectPrecisionLossInComplexDivision(Sema &S, QualType DivisorTy,
+                                                 SourceLocation OpLoc) {
+  // If the divisor is real, then this is real/real or complex/real division.
+  // Either way there can be no precision loss.
+  auto *CT = DivisorTy->getAs<ComplexType>();
+  if (!CT)
+    return;
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zahiraam wrote:

But that's only true if the target doesn't support higher precision types right? At this point this is not known.

https://github.com/llvm/llvm-project/pull/131477