Try to resolve symbol differences early, and if successful create a plain

data fragment. This reduces the time to assemble the test in 8711 from 60s to
54s.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120767 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 18 insertions, 3 deletions

diff --git a/include/llvm/MC/MCDwarf.h b/include/llvm/MC/MCDwarf.h
index 0c0a22e..d528ac5 100644
--- a/include/llvm/MC/MCDwarf.h
+++ b/include/llvm/MC/MCDwarf.h
@@ -209,7 +209,6 @@ namespace llvm {
     // This emits the Dwarf file and the line tables.
     //
     static void Emit(MCStreamer *MCOS, const MCSection *DwarfLineSection,
-                     MCSectionData *DLS, int PointerSize,
                      const MCSection *TextSection = NULL);
   };
 
diff --git a/include/llvm/MC/MCExpr.h b/include/llvm/MC/MCExpr.h
index fc9d18b..e953a11 100644
--- a/include/llvm/MC/MCExpr.h
+++ b/include/llvm/MC/MCExpr.h
@@ -16,6 +16,7 @@
 namespace llvm {
 class MCAsmInfo;
 class MCAsmLayout;
+class MCAssembler;
 class MCContext;
 class MCSymbol;
 class MCValue;
@@ -43,7 +44,8 @@ private:
 protected:
   explicit MCExpr(ExprKind _Kind) : Kind(_Kind) {}
 
-  bool EvaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout,
+  bool EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
+                                 const MCAsmLayout *Layout,
                                  bool InSet) const;
 public:
   /// @name Accessors
@@ -69,7 +71,11 @@ public:
   /// values. If not given, then only non-symbolic expressions will be
   /// evaluated.
   /// @result - True on success.
-  bool EvaluateAsAbsolute(int64_t &Res, const MCAsmLayout *Layout = 0) const;
+  bool EvaluateAsAbsolute(int64_t &Res) const;
+  bool EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm) const;
+  bool EvaluateAsAbsolute(int64_t &Res, const MCAsmLayout *Layout) const;
+  bool EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
+                          const MCAsmLayout *Layout) const;
 
   /// EvaluateAsRelocatable - Try to evaluate the expression to a relocatable
   /// value, i.e. an expression of the fixed form (a - b + constant).
diff --git a/include/llvm/MC/MCObjectStreamer.h b/include/llvm/MC/MCObjectStreamer.h
index 092bc84..a3f532d 100644
--- a/include/llvm/MC/MCObjectStreamer.h
+++ b/include/llvm/MC/MCObjectStreamer.h
@@ -69,6 +69,9 @@ public:
   virtual void EmitInstruction(const MCInst &Inst);
   virtual void EmitInstToFragment(const MCInst &Inst);
   virtual void EmitValueToOffset(const MCExpr *Offset, unsigned char Value);
+  virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
+                                        const MCSymbol *LastLabel,
+                                        const MCSymbol *Label);
   virtual void Finish();
 
   /// @}
diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index 4c96b2f..03fd011 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -351,6 +351,13 @@ namespace llvm {
                                        unsigned Isa,
                                        unsigned Discriminator);
 
+    virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
+                                          const MCSymbol *LastLabel,
+                                          const MCSymbol *Label) = 0;
+
+    void EmitDwarfSetLineAddr(int64_t LineDelta, const MCSymbol *Label,
+                              int PointerSize);
+
     virtual bool EmitCFIStartProc();
     virtual bool EmitCFIEndProc();
     virtual bool EmitCFIDefCfaOffset(int64_t Offset);