Implement .cfi_escape. Patch by Brian Anderson!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147352 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 10 insertions, 1 deletions

diff --git a/include/llvm/MC/MCDwarf.h b/include/llvm/MC/MCDwarf.h
index 9c77218215..2e026ab072 100644
--- a/include/llvm/MC/MCDwarf.h
+++ b/include/llvm/MC/MCDwarf.h
@@ -271,13 +271,14 @@ namespace llvm {
 
   class MCCFIInstruction {
   public:
-    enum OpType { SameValue, Remember, Restore, Move, RelMove };
+    enum OpType { SameValue, Remember, Restore, Move, RelMove, Escape };
   private:
     OpType Operation;
     MCSymbol *Label;
     // Move to & from location.
     MachineLocation Destination;
     MachineLocation Source;
+    std::vector<char> Values;
   public:
     MCCFIInstruction(OpType Op, MCSymbol *L)
       : Operation(Op), Label(L) {
@@ -296,10 +297,17 @@ namespace llvm {
       : Operation(Op), Label(L), Destination(D), Source(S) {
       assert(Op == RelMove);
     }
+    MCCFIInstruction(OpType Op, MCSymbol *L, StringRef Vals)
+      : Operation(Op), Label(L), Values(Vals.begin(), Vals.end()) {
+      assert(Op == Escape);
+    }
     OpType getOperation() const { return Operation; }
     MCSymbol *getLabel() const { return Label; }
     const MachineLocation &getDestination() const { return Destination; }
     const MachineLocation &getSource() const { return Source; }
+    const StringRef getValues() const {
+      return StringRef(&Values[0], Values.size());
+    }
   };
 
   struct MCDwarfFrameInfo {
diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index 9ba50b1a26..5483fb07f1 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -549,6 +549,7 @@ namespace llvm {
     virtual void EmitCFISameValue(int64_t Register);
     virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset);
     virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment);
+    virtual void EmitCFIEscape(StringRef Values);
 
     virtual void EmitWin64EHStartProc(const MCSymbol *Symbol);
     virtual void EmitWin64EHEndProc();