Add more generic version of reloc info padding to ensure enough space for rel...

src/ia32/lithium-codegen-ia32.h

Index: src/ia32/lithium-codegen-ia32.h
===================================================================
--- src/ia32/lithium-codegen-ia32.h	(revision 6848)
+++ src/ia32/lithium-codegen-ia32.h	(working copy)
@@ -60,6 +60,7 @@
         status_(UNUSED),
         deferred_(8),
         osr_pc_offset_(-1),
+        deoptimization_reloc_size(),
         resolver_(this) {
     PopulateDeoptimizationLiteralsWithInlinedFunctions();
   }
@@ -102,6 +103,8 @@
   // Emit frame translation commands for an environment.
   void WriteTranslation(LEnvironment* environment, Translation* translation);
 
+  void EnsureRelocSpaceForDeoptimization();
+
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
   LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
@@ -151,6 +154,9 @@
   bool GeneratePrologue();
   bool GenerateBody();
   bool GenerateDeferredCode();
+  // Pad the reloc info to ensure that we have enough space to patch during
+  // deoptimization.
+  bool GenerateRelocPadding();
   bool GenerateSafepointTable();
 
   void CallCode(Handle<Code> code, RelocInfo::Mode mode, LInstruction* instr,
@@ -251,6 +257,13 @@
   ZoneList<LDeferredCode*> deferred_;
   int osr_pc_offset_;
 
+  struct DeoptimizationRelocSize {
+    int min_size;
+    int last_pc_offset;
+  };
+
+  DeoptimizationRelocSize deoptimization_reloc_size;
+
   // Builder that keeps track of safepoints in the code. The table
   // itself is emitted at the end of the generated code.
   SafepointTableBuilder safepoints_;