Add an alternative implementation of CIE and FDE emission that outputs them
in the same order as the one in CodeGen.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130471 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCDwarf.cpp b/lib/MC/MCDwarf.cpp
index 7111758..1848430 100644
--- a/lib/MC/MCDwarf.cpp
+++ b/lib/MC/MCDwarf.cpp
@@ -824,9 +824,67 @@
};
}
+// This is an implementation of CIE and FDE emission that is bug by bug
+// compatible with the one in CodeGen. It is useful during the transition
+// to make it easy to compare the outputs, but should probably be removed
+// afterwards.
+void MCDwarfFrameEmitter::EmitDarwin(MCStreamer &streamer) {
+ FrameEmitterImpl Emitter;
+ DenseMap<const MCSymbol*, const MCSymbol*> Personalities;
+ const MCSymbol *aCIE = NULL;
+ const MCDwarfFrameInfo *aFrame = NULL;
+
+ for (unsigned i = 0, n = streamer.getNumFrameInfos(); i < n; ++i) {
+ const MCDwarfFrameInfo &frame = streamer.getFrameInfo(i);
+ if (!frame.Personality)
+ continue;
+ if (Personalities.count(frame.Personality))
+ continue;
+
+ const MCSymbol *cieStart = &Emitter.EmitCIE(streamer, frame.Personality,
+ frame.PersonalityEncoding,
+ frame.Lsda,
+ frame.LsdaEncoding);
+ aCIE = cieStart;
+ aFrame = &frame;
+ Personalities[frame.Personality] = cieStart;
+ }
+
+ if (Personalities.empty()) {
+ const MCDwarfFrameInfo &frame = streamer.getFrameInfo(0);
+ aCIE = &Emitter.EmitCIE(streamer, frame.Personality,
+ frame.PersonalityEncoding, frame.Lsda,
+ frame.LsdaEncoding);
+ aFrame = &frame;
+ }
+
+ MCSymbol *fdeEnd = NULL;
+ for (unsigned i = 0, n = streamer.getNumFrameInfos(); i < n; ++i) {
+ const MCDwarfFrameInfo &frame = streamer.getFrameInfo(i);
+ const MCSymbol *cieStart = Personalities[frame.Personality];
+ if (!cieStart)
+ cieStart = aCIE;
+
+ fdeEnd = Emitter.EmitFDE(streamer, *cieStart, frame);
+ if (i != n - 1)
+ streamer.EmitLabel(fdeEnd);
+ }
+
+ const MCContext &context = streamer.getContext();
+ const TargetAsmInfo &asmInfo = context.getTargetAsmInfo();
+ streamer.EmitValueToAlignment(asmInfo.getPointerSize());
+ if (fdeEnd)
+ streamer.EmitLabel(fdeEnd);
+}
+
void MCDwarfFrameEmitter::Emit(MCStreamer &streamer) {
const MCContext &context = streamer.getContext();
const TargetAsmInfo &asmInfo = context.getTargetAsmInfo();
+ if (!asmInfo.isFunctionEHFrameSymbolPrivate()) {
+ EmitDarwin(streamer);
+ return;
+ }
+
MCSymbol *fdeEnd = NULL;
DenseMap<CIEKey, const MCSymbol*> CIEStarts;
FrameEmitterImpl Emitter;