Partial ia32 implementation of optimized try/catch (by Kevin Millikin)

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index f576e37e4f6a888e6f41585164a49843fea12176..43158a4688d1e0a127bf62e16aaf3c2f6846b534 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -877,17 +877,10 @@ LEnvironment* LChunkBuilder::CreateEnvironment(
   BailoutId ast_id = hydrogen_env->ast_id();
   ASSERT(!ast_id.IsNone() ||
          hydrogen_env->frame_type() != JS_FUNCTION);
-  int value_count = hydrogen_env->length();
   LEnvironment* result =
-      new(zone()) LEnvironment(hydrogen_env->closure(),
-                               hydrogen_env->frame_type(),
-                               ast_id,
-                               hydrogen_env->parameter_count(),
-                               argument_count_,
-                               value_count,
-                               outer,
-                               zone());
+      new(zone()) LEnvironment(hydrogen_env, argument_count_, outer, zone());
   int argument_index = *argument_index_accumulator;
+  int value_count = hydrogen_env->length();
   for (int i = 0; i < value_count; ++i) {
     if (hydrogen_env->is_special_index(i)) continue;
 
@@ -2358,6 +2351,18 @@ LInstruction* LChunkBuilder::DoStackCheck(HStackCheck* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoEnterTry(HEnterTry* instr) {
+  current_block_->last_environment()->AddExceptionHandler();
+  return new(zone()) LEnterTry;
+}
+
+
+LInstruction* LChunkBuilder::DoLeaveTry(HLeaveTry* instr) {
+  current_block_->last_environment()->RemoveExceptionHandler();
+  return new(zone()) LLeaveTry;
+}
+
+
 LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
   HEnvironment* outer = current_block_->last_environment();
   HConstant* undefined = graph()->GetConstantUndefined();