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As a first step, emit both the compact unwind and CIE/FDEs for a function. 

llvm-svn: 139152
This commit is contained in:
Bill Wendling 2011-09-06 18:37:11 +00:00
parent 5065cdd0ea
commit 9803abb788
1 changed files with 7 additions and 13 deletions
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20
llvm/lib/MC/MCDwarf.cpp
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@ -1013,24 +1013,18 @@ void MCDwarfFrameEmitter::Emit(MCStreamer &Streamer,
MCObjectFileInfo *MOFI = MCObjectFileInfo *MOFI =
const_cast<MCObjectFileInfo*>(Context.getObjectFileInfo()); const_cast<MCObjectFileInfo*>(Context.getObjectFileInfo());
FrameEmitterImpl Emitter(UsingCFI, IsEH); FrameEmitterImpl Emitter(UsingCFI, IsEH);
SmallVector<MCDwarfFrameInfo, 8> RequiresFDE; ArrayRef<MCDwarfFrameInfo> FrameArray = Streamer.getFrameInfos();
ArrayRef<MCDwarfFrameInfo> FrameArray;
if (IsEH && MOFI->getCompactUnwindSection()) { // Emit the compact unwind info if available.
// FIXME: This emits both the compact unwind and the old CIE/FDE
// information. Only one of those is needed.
if (IsEH && MOFI->getCompactUnwindSection())
for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) { for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) {
const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i); const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i);
if (!Frame.CompactUnwindEncoding || if (!Frame.CompactUnwindEncoding)
!Emitter.EmitCompactUnwind(Streamer, Frame)) Emitter.EmitCompactUnwind(Streamer, Frame);
RequiresFDE.push_back(Streamer.getFrameInfo(i));
} }
// Early exit if we don't need to emit FDEs.
if (RequiresFDE.empty()) return;
FrameArray = RequiresFDE;
} else {
FrameArray = Streamer.getFrameInfos();
}
const MCSection &Section = IsEH ? *MOFI->getEHFrameSection() : const MCSection &Section = IsEH ? *MOFI->getEHFrameSection() :
*MOFI->getDwarfFrameSection(); *MOFI->getDwarfFrameSection();
Streamer.SwitchSection(&Section); Streamer.SwitchSection(&Section);