[ic] Remove unnecessary access rights checks from the IC handlers.

src/x87/macro-assembler-x87.cc

Index: src/x87/macro-assembler-x87.cc
diff --git a/src/x87/macro-assembler-x87.cc b/src/x87/macro-assembler-x87.cc
index 95df94e06f52df980e266c7a7d9b623f13c035c3..e20fe7cec0386a5f8ba42f6f7efd7ca2728fb56f 100644
--- a/src/x87/macro-assembler-x87.cc
+++ b/src/x87/macro-assembler-x87.cc
@@ -1224,79 +1224,6 @@ void MacroAssembler::PopStackHandler() {
 }
 
 
-void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
-                                            Register scratch1,
-                                            Register scratch2,
-                                            Label* miss) {
-  Label same_contexts;
-
-  DCHECK(!holder_reg.is(scratch1));
-  DCHECK(!holder_reg.is(scratch2));
-  DCHECK(!scratch1.is(scratch2));
-
-  // Load current lexical context from the active StandardFrame, which
-  // may require crawling past STUB frames.
-  Label load_context;
-  Label has_context;
-  mov(scratch2, ebp);
-  bind(&load_context);
-  mov(scratch1,
-      MemOperand(scratch2, CommonFrameConstants::kContextOrFrameTypeOffset));
-  JumpIfNotSmi(scratch1, &has_context);
-  mov(scratch2, MemOperand(scratch2, CommonFrameConstants::kCallerFPOffset));
-  jmp(&load_context);
-  bind(&has_context);
-
-  // When generating debug code, make sure the lexical context is set.
-  if (emit_debug_code()) {
-    cmp(scratch1, Immediate(0));
-    Check(not_equal, kWeShouldNotHaveAnEmptyLexicalContext);
-  }
-  // Load the native context of the current context.
-  mov(scratch1, ContextOperand(scratch1, Context::NATIVE_CONTEXT_INDEX));
-
-  // Check the context is a native context.
-  if (emit_debug_code()) {
-    // Read the first word and compare to native_context_map.
-    cmp(FieldOperand(scratch1, HeapObject::kMapOffset),
-        isolate()->factory()->native_context_map());
-    Check(equal, kJSGlobalObjectNativeContextShouldBeANativeContext);
-  }
-
-  // Check if both contexts are the same.
-  cmp(scratch1, FieldOperand(holder_reg, JSGlobalProxy::kNativeContextOffset));
-  j(equal, &same_contexts);
-
-  // Compare security tokens, save holder_reg on the stack so we can use it
-  // as a temporary register.
-  //
-  // Check that the security token in the calling global object is
-  // compatible with the security token in the receiving global
-  // object.
-  mov(scratch2,
-      FieldOperand(holder_reg, JSGlobalProxy::kNativeContextOffset));
-
-  // Check the context is a native context.
-  if (emit_debug_code()) {
-    cmp(scratch2, isolate()->factory()->null_value());
-    Check(not_equal, kJSGlobalProxyContextShouldNotBeNull);
-
-    // Read the first word and compare to native_context_map(),
-    cmp(FieldOperand(scratch2, HeapObject::kMapOffset),
-        isolate()->factory()->native_context_map());
-    Check(equal, kJSGlobalObjectNativeContextShouldBeANativeContext);
-  }
-
-  int token_offset = Context::kHeaderSize +
-                     Context::SECURITY_TOKEN_INDEX * kPointerSize;
-  mov(scratch1, FieldOperand(scratch1, token_offset));
-  cmp(scratch1, FieldOperand(scratch2, token_offset));
-  j(not_equal, miss);
-
-  bind(&same_contexts);
-}
-
-
 // Compute the hash code from the untagged key.  This must be kept in sync with
 // ComputeIntegerHash in utils.h and KeyedLoadGenericStub in
 // code-stub-hydrogen.cc