Integrate the Irregexp Regular Expression Engine.

runtime/vm/intrinsifier_arm64.cc

Index: runtime/vm/intrinsifier_arm64.cc
diff --git a/runtime/vm/intrinsifier_arm64.cc b/runtime/vm/intrinsifier_arm64.cc
index 5e15cfcf0afacff45116194a80a2013a22c9fecd..3c2dadc84c623a3558e3b593d964213ce0254a18 100644
--- a/runtime/vm/intrinsifier_arm64.cc
+++ b/runtime/vm/intrinsifier_arm64.cc
@@ -8,9 +8,11 @@
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
+#include "vm/dart_entry.h"
 #include "vm/flow_graph_compiler.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
+#include "vm/regexp_assembler.h"
 #include "vm/symbols.h"
 
 namespace dart {
@@ -1933,6 +1935,40 @@ void Intrinsifier::TwoByteString_equality(Assembler* assembler) {
 }
 
 
+void Intrinsifier::JSRegExp_ExecuteMatch(Assembler* assembler) {
+  if (FLAG_use_jscre) {
+    return;
+  }
+  static const intptr_t kRegExpParamOffset = 2 * kWordSize;
+  static const intptr_t kStringParamOffset = 1 * kWordSize;
+  // start_index smi is located at offset 0.
+
+  // Incoming registers:
+  // R0: Function. (Will be reloaded with the specialized matcher function.)
+  // R4: Arguments descriptor. (Will be preserved.)
+  // R5: IC-Data. (Will be preserved.)
+
+  // Load the specialized function pointer into R0. Leverage the fact the
+  // string CIDs as well as stored function pointers are in sequence.
+  __ ldr(R2, Address(SP, kRegExpParamOffset));
+  __ ldr(R1, Address(SP, kStringParamOffset));
+  __ LoadClassId(R1, R1, kNoPP);
+  __ AddImmediate(R1, R1, -kOneByteStringCid, kNoPP);
+  __ add(R1, R2, Operand(R1, LSL, kWordSizeLog2));
+  __ ldr(R0, FieldAddress(R1, JSRegExp::function_offset(kOneByteStringCid)));
+
+  // Registers are now set up for the lazy compile stub. It expects the function
+  // in R0, the argument descriptor in R4, and IC-Data in R5.
+  static const intptr_t arg_count = RegExpMacroAssembler::kParamCount;
+  __ LoadObject(R4, Array::Handle(ArgumentsDescriptor::New(arg_count)), kNoPP);
+
+  // Tail-call the function.
+  __ ldr(R1, FieldAddress(R0, Function::instructions_offset()));
+  __ AddImmediate(R1, R1, Instructions::HeaderSize() - kHeapObjectTag, kNoPP);
+  __ br(R1);
+}
+
+
 // On stack: user tag (+0).
 void Intrinsifier::UserTag_makeCurrent(Assembler* assembler) {
   // R1: Isolate.