We should only ban this if long double is a double double. x86's 80 bit
long double is fine and supported by the backend.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@322779
91177308-0d34-0410-b5e6-
96231b3b80d8
Float128AndLongDouble |= (LHSElemType == S.Context.LongDoubleTy &&
RHSElemType == S.Context.Float128Ty);
- /* We've handled the situation where __float128 and long double have the same
- representation. The only other allowable conversion is if long double is
- really just double.
- */
+ // We've handled the situation where __float128 and long double have the same
+ // representation. We allow all conversions for all possible long double types
+ // except PPC's double double.
return Float128AndLongDouble &&
- (&S.Context.getFloatTypeSemantics(S.Context.LongDoubleTy) !=
- &llvm::APFloat::IEEEdouble());
+ (&S.Context.getFloatTypeSemantics(S.Context.LongDoubleTy) ==
+ &llvm::APFloat::PPCDoubleDouble());
}
typedef ExprResult PerformCastFn(Sema &S, Expr *operand, QualType toType);
(FromType == S.Context.LongDoubleTy &&
ToType == S.Context.Float128Ty));
if (Float128AndLongDouble &&
- (&S.Context.getFloatTypeSemantics(S.Context.LongDoubleTy) !=
- &llvm::APFloat::IEEEdouble()))
+ (&S.Context.getFloatTypeSemantics(S.Context.LongDoubleTy) ==
+ &llvm::APFloat::PPCDoubleDouble()))
return false;
}
// Floating point conversions (C++ 4.8).
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 \
// RUN: -triple powerpc64le-unknown-linux-gnu -target-cpu pwr8 \
// RUN: -target-feature +float128 %s
+// RUN: %clang_cc1 -fsyntax-only -std=c++11 -triple x86_64-unknown-linux-gnu -Wno-unused-value -Wno-parentheses %s
__float128 qf();
long double ldf();
+#ifdef __PPC__
// FIXME: once operations between long double and __float128 are implemented for
// targets where the types are different, these next two will change
long double ld{qf()}; // expected-error {{cannot initialize a variable of type 'long double' with an rvalue of type '__float128'}}
auto test2(long double a, __float128 b) -> decltype(a + b) { // expected-error {{invalid operands to binary expression ('long double' and '__float128')}}
return a + b; // expected-error {{invalid operands to binary expression ('long double' and '__float128')}}
}
+#endif
void test3(bool b) {
long double ld;