Use direct jump and call instruction for X64 when the deoptimization entries are in the code range

src/x64/assembler-x64.cc

Index: src/x64/assembler-x64.cc
===================================================================
--- src/x64/assembler-x64.cc	(revision 13740)
+++ src/x64/assembler-x64.cc	(working copy)
@@ -356,6 +356,7 @@
 Assembler::Assembler(Isolate* isolate, void* buffer, int buffer_size)
     : AssemblerBase(isolate, buffer, buffer_size),
       code_targets_(100),
+      runtime_entries_(100),

[danno, 2013/03/07 14:57:23]

Ad previously commented, I don't think you need this.

[haitao.feng, 2013/03/08 05:30:05]

Done.

       positions_recorder_(this) {
   // Clear the buffer in debug mode unless it was provided by the
   // caller in which case we can't be sure it's okay to overwrite
@@ -840,6 +841,16 @@
 }
 
 
+void Assembler::call(Address entry, RelocInfo::Mode rmode) {
+  ASSERT(RelocInfo::IsRuntimeEntry(rmode));
+  positions_recorder()->WriteRecordedPositions();
+  EnsureSpace ensure_space(this);
+  // 1110 1000 #32-bit disp.
+  emit(0xE8);
+  emit_runtime_entry(entry, rmode);
+}
+
+
 void Assembler::call(Handle<Code> target,
                      RelocInfo::Mode rmode,
                      TypeFeedbackId ast_id) {
@@ -1246,6 +1257,16 @@
 }
 
 
+void Assembler::j(Condition cc, Address entry, RelocInfo::Mode rmode) {
+  ASSERT(RelocInfo::IsRuntimeEntry(rmode));
+  EnsureSpace ensure_space(this);
+  ASSERT(is_uint4(cc));
+  emit(0x0F);
+  emit(0x80 | cc);
+  emit_runtime_entry(entry, rmode);
+}
+
+
 void Assembler::j(Condition cc,
                   Handle<Code> target,
                   RelocInfo::Mode rmode) {
@@ -1308,6 +1329,15 @@
 }
 
 
+void Assembler::jmp(Address entry, RelocInfo::Mode rmode) {
+  ASSERT(RelocInfo::IsRuntimeEntry(rmode));
+  EnsureSpace ensure_space(this);
+  ASSERT(RelocInfo::IsRuntimeEntry(rmode));
+  emit(0xE9);
+  emit_runtime_entry(entry, rmode);
+}
+
+
 void Assembler::jmp(Register target) {
   EnsureSpace ensure_space(this);
   // Opcode FF/4 r64.
@@ -3048,6 +3078,7 @@
 
 
 const int RelocInfo::kApplyMask = RelocInfo::kCodeTargetMask |
+    1 << RelocInfo::RUNTIME_ENTRY |
     1 << RelocInfo::INTERNAL_REFERENCE |
     1 << RelocInfo::CODE_AGE_SEQUENCE;