[clang] The pragma STDC CX_LIMITED_RANGE ON should have precedence. (PR #98520)

[Aaron Ballman via cfe-commits]

================
@@ -328,12 +328,20 @@ class ComplexExprEmitter
     }
   }
 
-  QualType getPromotionType(QualType Ty, bool IsDivOpCode = false) {
+  QualType getPromotionType(FPOptionsOverride Features, QualType Ty,
+                            bool IsDivOpCode = false) {
     if (auto *CT = Ty->getAs<ComplexType>()) {
       QualType ElementType = CT->getElementType();
-      if (IsDivOpCode && ElementType->isFloatingType() &&
-          CGF.getLangOpts().getComplexRange() ==
-              LangOptions::ComplexRangeKind::CX_Promoted)
+      bool isFloatingType = ElementType->isFloatingType();
+      bool isComplexRangePromoted = CGF.getLangOpts().getComplexRange() ==
+                                    LangOptions::ComplexRangeKind::CX_Promoted;
+      bool hasNoComplexRangeOverride = !Features.hasComplexRangeOverride();
+      bool hasMatchingComplexRange = Features.hasComplexRangeOverride() &&
+                                     Features.getComplexRangeOverride() ==
+                                         CGF.getLangOpts().getComplexRange();
----------------
AaronBallman wrote:

```suggestion
      bool IsFloatingType = ElementType->isFloatingType();
      bool IsComplexRangePromoted = CGF.getLangOpts().getComplexRange() ==
                                    LangOptions::ComplexRangeKind::CX_Promoted;
      bool HasNoComplexRangeOverride = !Features.hasComplexRangeOverride();
      bool HasMatchingComplexRange = Features.hasComplexRangeOverride() &&
                                     Features.getComplexRangeOverride() ==
                                         CGF.getLangOpts().getComplexRange();
```

https://github.com/llvm/llvm-project/pull/98520
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