Thumb2 assembly parsing and encoding for USAX.

[oota-llvm.git] / lib / MC / MCStreamer.cpp

diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 974e885aacd0c642b3a137ab2aad752d32a7c4e2..0fbf3875f1a050a368e5d615835daff5f4c8b3de 100644 (file)
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -22,7 +22,8 @@ using namespace llvm;
 
 MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
                                          EmitDebugFrame(false),
-                                         CurrentW64UnwindInfo(0) {
+                                         CurrentW64UnwindInfo(0),
+                                         LastSymbol(0) {
   const MCSection *section = NULL;
   SectionStack.push_back(std::make_pair(section, section));
 }
@@ -80,9 +81,11 @@ void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
   assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
          "Invalid size");
   char buf[8];
-  // FIXME: Endianness assumption.
-  for (unsigned i = 0; i != Size; ++i)
-    buf[i] = uint8_t(Value >> (i * 8));
+  const bool isLittleEndian = Context.getAsmInfo().isLittleEndian();
+  for (unsigned i = 0; i != Size; ++i) {
+    unsigned index = isLittleEndian ? i : (Size - i - 1);
+    buf[i] = uint8_t(Value >> (index * 8));
+  }
   EmitBytes(StringRef(buf, Size), AddrSpace);
 }
 
@@ -169,10 +172,13 @@ void MCStreamer::EmitLabel(MCSymbol *Symbol) {
   assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
   assert(getCurrentSection() && "Cannot emit before setting section!");
   Symbol->setSection(*getCurrentSection());
+  LastSymbol = Symbol;
+}
 
-  StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
-  if (!Symbol->getName().startswith(Prefix))
-    LastNonPrivate = Symbol;
+void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
+  EnsureValidFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+  CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
 }
 
 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
@@ -185,10 +191,20 @@ void MCStreamer::EmitCFIStartProc() {
   MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
   if (CurFrame && !CurFrame->End)
     report_fatal_error("Starting a frame before finishing the previous one!");
+
   MCDwarfFrameInfo Frame;
-  Frame.Begin = getContext().CreateTempSymbol();
-  Frame.Function = LastNonPrivate;
-  EmitLabel(Frame.Begin);
+  Frame.Function = LastSymbol;
+
+  // If the function is externally visible, we need to create a local
+  // symbol to avoid relocations.
+  StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
+  if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
+    Frame.Begin = LastSymbol;
+  } else {
+    Frame.Begin = getContext().CreateTempSymbol();
+    EmitLabel(Frame.Begin);
+  }
+
   FrameInfos.push_back(Frame);
 }