Add TargetInfo::useBitfieldTypeAlignment().
- Used to determine whether the alignment of the type in a bit-field is
respected when laying out structures. The default is true, targets can
override this as needed.
- This is designed to correspond to the PCC_BITFIELD_TYPE_MATTERS macro in
gcc. The AST/Sema implementation only affects one line, unless I have
forgotten something. I'd appreciate further review.
- IRgen still needs to be updated to fully support this (which is effectively
PR5591).
llvm-svn: 101356
diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
index 136089f..8b4fdee 100644
--- a/clang/lib/Basic/TargetInfo.cpp
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -20,9 +20,8 @@
// TargetInfo Constructor.
TargetInfo::TargetInfo(const std::string &T) : Triple(T) {
- // Set defaults. Defaults are set for a 32-bit RISC platform,
- // like PPC or SPARC.
- // These should be overridden by concrete targets as needed.
+ // Set defaults. Defaults are set for a 32-bit RISC platform, like PPC or
+ // SPARC. These should be overridden by concrete targets as needed.
TLSSupported = true;
PointerWidth = PointerAlign = 32;
IntWidth = IntAlign = 32;
@@ -45,6 +44,7 @@
Char32Type = UnsignedInt;
Int64Type = SignedLongLong;
SigAtomicType = SignedInt;
+ UseBitfieldTypeAlignment = true;
FloatFormat = &llvm::APFloat::IEEEsingle;
DoubleFormat = &llvm::APFloat::IEEEdouble;
LongDoubleFormat = &llvm::APFloat::IEEEdouble;