Implement .cfi_remember_state and .cfi_restore_state.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122602 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 23 insertions, 2 deletions

diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 048e8866bd..9a85707590 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -179,8 +179,8 @@ bool MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
   EmitLabel(Label);
   MachineLocation Dest(MachineLocation::VirtualFP);
   MachineLocation Source(MachineLocation::VirtualFP, -Offset);
-  MachineMove Move(Label, Dest, Source);
-  CurFrame->Moves.push_back(Move);
+  MCCFIInstruction Instruction(Label, Dest, Source);
+  CurFrame->Instructions.push_back(Instruction);
   return false;
 }
 
@@ -211,6 +211,27 @@ bool MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
   return false;
 }
 
+bool MCStreamer::EmitCFIRememberState() {
+  EnsureValidFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+  MCSymbol *Label = getContext().CreateTempSymbol();
+  EmitLabel(Label);
+  MCCFIInstruction Instruction(MCCFIInstruction::Remember, Label);
+  CurFrame->Instructions.push_back(Instruction);
+  return false;
+}
+
+bool MCStreamer::EmitCFIRestoreState() {
+  // FIXME: Error if there is no matching cfi_remember_state.
+  EnsureValidFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+  MCSymbol *Label = getContext().CreateTempSymbol();
+  EmitLabel(Label);
+  MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label);
+  CurFrame->Instructions.push_back(Instruction);
+  return false;
+}
+
 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
 /// the specified string in the output .s file.  This capability is
 /// indicated by the hasRawTextSupport() predicate.