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Track the compact unwind encoding for when we are unable to generate compact unwind information.

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Compact unwind has an encoding for when we're not able to generate compact
unwind and must generate an EH frame instead. Track that, but still emit that CU
encoding.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179220 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2013-04-10 21:42:06 +00:00
parent 49bbb35dfc
commit 62c75ad430
3 changed files with 21 additions and 7 deletions
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9
lib/MC/MCDwarf.cpp
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@ -1168,10 +1168,10 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer,
// .quad except_tab1
uint32_t Encoding = Frame.CompactUnwindEncoding;
if (!Encoding) return false;
bool DwarfEHFrameOnly = (Encoding == MOFI->getCompactUnwindDwarfEHFrameOnly());
// The encoding needs to know we have an LSDA.
if (Frame.Lsda)
if (!DwarfEHFrameOnly && Frame.Lsda)
Encoding |= 0x40000000;
Streamer.SwitchSection(MOFI->getCompactUnwindSection());
@ -1194,11 +1194,10 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer,
Twine::utohexstr(Encoding));
Streamer.EmitIntValue(Encoding, Size);
// Personality Function
Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_absptr);
if (VerboseAsm) Streamer.AddComment("Personality Function");
if (Frame.Personality)
if (!DwarfEHFrameOnly && Frame.Personality)
Streamer.EmitSymbolValue(Frame.Personality, Size);
else
Streamer.EmitIntValue(0, Size); // No personality fn
@ -1206,7 +1205,7 @@ bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer,
// LSDA
Size = getSizeForEncoding(Streamer, Frame.LsdaEncoding);
if (VerboseAsm) Streamer.AddComment("LSDA");
if (Frame.Lsda)
if (!DwarfEHFrameOnly && Frame.Lsda)
Streamer.EmitSymbolValue(Frame.Lsda, Size);
else
Streamer.EmitIntValue(0, Size); // No LSDA