Revert "Integrate the Irregexp Regular Expression Engine."

runtime/vm/intrinsifier_x64.cc

Index: runtime/vm/intrinsifier_x64.cc
diff --git a/runtime/vm/intrinsifier_x64.cc b/runtime/vm/intrinsifier_x64.cc
index 2cb9d36d92c51c1b19641e71a7a31c5c111d06da..320f9b87692aa6abe38af92ff47145c89df27213 100644
--- a/runtime/vm/intrinsifier_x64.cc
+++ b/runtime/vm/intrinsifier_x64.cc
@@ -8,11 +8,9 @@
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
-#include "vm/dart_entry.h"
 #include "vm/flow_graph_compiler.h"
 #include "vm/instructions.h"
 #include "vm/object_store.h"
-#include "vm/regexp_assembler.h"
 #include "vm/symbols.h"
 
 namespace dart {
@@ -1919,40 +1917,6 @@ void Intrinsifier::TwoByteString_equality(Assembler* assembler) {
 }
 
 
-void Intrinsifier::JSRegExp_ExecuteMatch(Assembler* assembler) {
-  if (FLAG_use_jscre) {
-    return;
-  }
-  static const intptr_t kRegExpParamOffset = 3 * kWordSize;
-  static const intptr_t kStringParamOffset = 2 * kWordSize;
-  // start_index smi is located at offset 1.
-
-  // Incoming registers:
-  // RAX: Function. (Will be loaded with the specialized matcher function.)
-  // RCX: IC-Data. (Will be preserved.)
-  // R10: Arguments descriptor. (Will be preserved.)
-
-  // Load the specialized function pointer into RAX. Leverage the fact the
-  // string CIDs as well as stored function pointers are in sequence.
-  __ movq(RBX, Address(RSP, kRegExpParamOffset));
-  __ movq(RDI, Address(RSP, kStringParamOffset));
-  __ LoadClassId(RDI, RDI);
-  __ SubImmediate(RDI, Immediate(kOneByteStringCid), PP);
-  __ movq(RAX, FieldAddress(RBX, RDI, TIMES_8,
-                            JSRegExp::function_offset(kOneByteStringCid)));
-
-  // Registers are now set up for the lazy compile stub. It expects the function
-  // in RAX, the argument descriptor in R10, and IC-Data in RCX.
-  static const intptr_t arg_count = RegExpMacroAssembler::kParamCount;
-  __ LoadObject(R10, Array::Handle(ArgumentsDescriptor::New(arg_count)), PP);
-
-  // Tail-call the function.
-  __ movq(RDI, FieldAddress(RAX, Function::instructions_offset()));
-  __ addq(RDI, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
-  __ jmp(RDI);
-}
-
-
 // On stack: user tag (+1), return-address (+0).
 void Intrinsifier::UserTag_makeCurrent(Assembler* assembler) {
   // RBX: Isolate.