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MC: add and use an accessor for WinCFI 

This adds a utility method to access the WinCFI information in bulk and uses
that to iterate rather than requesting the count and individually iterating
them.  This is in preparation for restructuring WinCFI handling to enable more
clear sharing across architectures to enable unwind information emission for
Windows on ARM.

llvm-svn: 212683
This commit is contained in:
Saleem Abdulrasool 2014-07-10 04:50:06 +00:00
parent 8876c3face
commit 427c08d48b
2 changed files with 18 additions and 14 deletions
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4
llvm/include/llvm/MC/MCStreamer.h
View File

@ -243,6 +243,10 @@ public:
return *W64UnwindInfos[i];
}
ArrayRef<MCWin64EHUnwindInfo *> getW64UnwindInfos() const {
return W64UnwindInfos;
}
void generateCompactUnwindEncodings(MCAsmBackend *MAB);
/// @name Assembly File Formatting.

28
llvm/lib/MC/MCWin64EH.cpp
View File

@ -274,23 +274,23 @@ void MCWin64EHUnwindEmitter::EmitUnwindInfo(MCStreamer &streamer,
llvm::EmitUnwindInfo(streamer, info);
}
void MCWin64EHUnwindEmitter::Emit(MCStreamer &streamer) {
MCContext &context = streamer.getContext();
void MCWin64EHUnwindEmitter::Emit(MCStreamer &Streamer) {
MCContext &Context = Streamer.getContext();
// Emit the unwind info structs first.
for (unsigned i = 0; i < streamer.getNumW64UnwindInfos(); ++i) {
MCWin64EHUnwindInfo &info = streamer.getW64UnwindInfo(i);
const MCSection *xdataSect =
getWin64EHTableSection(GetSectionSuffix(info.Function), context);
streamer.SwitchSection(xdataSect);
llvm::EmitUnwindInfo(streamer, &info);
for (const auto &CFI : Streamer.getW64UnwindInfos()) {
const MCSection *XData =
getWin64EHTableSection(GetSectionSuffix(CFI->Function), Context);
Streamer.SwitchSection(XData);
EmitUnwindInfo(Streamer, CFI);
}
// Now emit RUNTIME_FUNCTION entries.
for (unsigned i = 0; i < streamer.getNumW64UnwindInfos(); ++i) {
MCWin64EHUnwindInfo &info = streamer.getW64UnwindInfo(i);
const MCSection *pdataSect =
getWin64EHFuncTableSection(GetSectionSuffix(info.Function), context);
streamer.SwitchSection(pdataSect);
EmitRuntimeFunction(streamer, &info);
for (const auto &CFI : Streamer.getW64UnwindInfos()) {
const MCSection *PData =
getWin64EHFuncTableSection(GetSectionSuffix(CFI->Function), Context);
Streamer.SwitchSection(PData);
EmitRuntimeFunction(Streamer, CFI);
}
}