Reapply changes reverted by r343235

- Add fix so that all code paths that create DWARFContext
  with an ObjectFile initialise the target architecture in the context
- Add an assert that the Arch is known in the Dwarf CallFrameString method

llvm-svn: 343317

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
index c4744ac5d51..58c400a7132 100644
--- a/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/llvm/lib/MC/MCAsmStreamer.cpp
@@ -285,6 +285,7 @@ public:
   void EmitCFIUndefined(int64_t Register) override;
   void EmitCFIRegister(int64_t Register1, int64_t Register2) override;
   void EmitCFIWindowSave() override;
+  void EmitCFINegateRAState() override;
   void EmitCFIReturnColumn(int64_t Register) override;
 
   void EmitWinCFIStartProc(const MCSymbol *Symbol, SMLoc Loc) override;
@@ -1564,6 +1565,12 @@ void MCAsmStreamer::EmitCFIWindowSave() {
   EmitEOL();
 }
 
+void MCAsmStreamer::EmitCFINegateRAState() {
+  MCStreamer::EmitCFINegateRAState();
+  OS << "\t.cfi_negate_ra_state";
+  EmitEOL();
+}
+
 void MCAsmStreamer::EmitCFIReturnColumn(int64_t Register) {
   MCStreamer::EmitCFIReturnColumn(Register);
   OS << "\t.cfi_return_column " << Register;