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Emit debug info for bitfields.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64815 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2009-02-17 21:23:59 +00:00
parent f163a95705
commit 36375ee7a5
4 changed files with 49 additions and 7 deletions
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19
lib/CodeGen/AsmPrinter/DwarfWriter.cpp
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@@ -1873,7 +1873,24 @@ private:
AddSourceLine(MemberDie, &DT);
// FIXME _ Handle bitfields
uint64_t Size = DT.getSizeInBits();
uint64_t FieldSize = DT.getOriginalTypeSize();
if (Size != FieldSize) {
// Handle bitfield.
AddUInt(MemberDie, DW_AT_byte_size, 0, DT.getOriginalTypeSize() >> 3);
AddUInt(MemberDie, DW_AT_bit_size, 0, DT.getSizeInBits());
uint64_t Offset = DT.getOffsetInBits();
uint64_t FieldOffset = Offset;
uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
uint64_t HiMark = (Offset + FieldSize) & AlignMask;
FieldOffset = (HiMark - FieldSize);
Offset -= FieldOffset;
// Maybe we need to work from the other end.
if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
AddUInt(MemberDie, DW_AT_bit_offset, 0, Offset);
}
DIEBlock *Block = new DIEBlock();
AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst);
AddUInt(Block, 0, DW_FORM_udata, DT.getOffsetInBits() >> 3);