fixup! [llvm][clang] duplicate long double layout logic from clang to LLVM

Author: tgross35

llvm/include/llvm/TargetParser/Triple.h

@@ -1283,7 +1283,7 @@ class Triple {
 
   /// Return true if `long double` and `_Float128` have the same layout.
   bool isLongDoubleF128(const StringRef &ABIName) const {
-    return getCLayouts(ABIName).LongDoubleWidth == 128;
+    return getCLayouts(ABIName).LongDoubleFormat == &APFloatBase::IEEEquad();
   }
 };
 

llvm/lib/TargetParser/Triple.cpp

@@ -2165,12 +2165,12 @@ VersionTuple Triple::getCanonicalVersionForOS(OSType OSKind,
 }
 
 Triple::CLayouts Triple::getCLayouts(const StringRef &ABIName) const {
-  Triple::CLayouts Layouts;
-
   // Default to a 32-bit RISC platform
-  Layouts.LongDoubleWidth = 64;
-  Layouts.LongDoubleAlign = 64;
-  Layouts.LongDoubleFormat = &llvm::APFloat::IEEEdouble();
+  Triple::CLayouts Layouts {
+    .LongDoubleWidth = 64,
+    .LongDoubleAlign = 64,
+    .LongDoubleFormat = &llvm::APFloat::IEEEdouble(),
+  };
 
   enum ArchType Arch = getArch();