Move .ident handling to MCStreamer.

No functionality change, but exposes the API so that codegen can use it too.

Patch by Katya Romanova.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192757 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 17 insertions, 3 deletions

diff --git a/include/llvm/MC/MCAsmInfo.h b/include/llvm/MC/MCAsmInfo.h
index 3734d7e006..c9cecc1738 100644
--- a/include/llvm/MC/MCAsmInfo.h
+++ b/include/llvm/MC/MCAsmInfo.h
@@ -271,6 +271,10 @@ namespace llvm {
     /// .file directive, this is true for ELF targets.
     bool HasSingleParameterDotFile;          // Defaults to true.
 
+    /// hasIdentDirective - True if the target has a .ident directive, this is
+    /// true for ELF targets.
+    bool HasIdentDirective;                  // Defaults to false.
+
     /// HasNoDeadStrip - True if this target supports the MachO .no_dead_strip
     /// directive.
     bool HasNoDeadStrip;                     // Defaults to false.
@@ -523,6 +527,7 @@ namespace llvm {
     }
     bool hasDotTypeDotSizeDirective() const {return HasDotTypeDotSizeDirective;}
     bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
+    bool hasIdentDirective() const { return HasIdentDirective; }
     bool hasNoDeadStrip() const { return HasNoDeadStrip; }
     bool hasSymbolResolver() const { return HasSymbolResolver; }
     const char *getWeakRefDirective() const { return WeakRefDirective; }
diff --git a/include/llvm/MC/MCELFStreamer.h b/include/llvm/MC/MCELFStreamer.h
index 8dbe337b0f..4e24dcfacd 100644
--- a/include/llvm/MC/MCELFStreamer.h
+++ b/include/llvm/MC/MCELFStreamer.h
@@ -31,13 +31,14 @@ class MCELFStreamer : public MCObjectStreamer {
 public:
   MCELFStreamer(MCContext &Context, MCTargetStreamer *TargetStreamer,
                 MCAsmBackend &TAB, raw_ostream &OS, MCCodeEmitter *Emitter)
-      : MCObjectStreamer(Context, TargetStreamer, TAB, OS, Emitter) {}
+      : MCObjectStreamer(Context, TargetStreamer, TAB, OS, Emitter), 
+                         SeenIdent(false) {}
 
   MCELFStreamer(MCContext &Context, MCTargetStreamer *TargetStreamer,
                 MCAsmBackend &TAB, raw_ostream &OS, MCCodeEmitter *Emitter,
                 MCAssembler *Assembler)
-      : MCObjectStreamer(Context, TargetStreamer, TAB, OS, Emitter, Assembler) {
-  }
+      : MCObjectStreamer(Context, TargetStreamer, TAB, OS, Emitter, Assembler), 
+                         SeenIdent(false) {}
 
   virtual ~MCELFStreamer();
 
@@ -77,6 +78,8 @@ public:
 
   virtual void EmitFileDirective(StringRef Filename);
 
+  virtual void EmitIdent(StringRef IdentString);
+
   virtual void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned);
 
   virtual void Flush();
@@ -93,6 +96,8 @@ private:
 
   void fixSymbolsInTLSFixups(const MCExpr *expr);
 
+  bool SeenIdent;
+
   struct LocalCommon {
     MCSymbolData *SD;
     uint64_t Size;
diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index d24f3fd4be..974feea08e 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -571,6 +571,10 @@ public:
   /// implement the '.file "foo.c"' assembler directive.
   virtual void EmitFileDirective(StringRef Filename) = 0;
 
+  /// Emit the "identifiers" directive.  This implements the
+  /// '.ident "version foo"' assembler directive.
+  virtual void EmitIdent(StringRef IdentString) {}
+
   /// EmitDwarfFileDirective - Associate a filename with a specified logical
   /// file number.  This implements the DWARF2 '.file 4 "foo.c"' assembler
   /// directive.