Guard the debug check at the start of every JS function with

--debug-code so it is not normally compiled in debug builds.

Review URL: http://codereview.chromium.org/268014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3036 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/virtual-frame-ia32.cc

@@ -455,6 +455,7 @@ void VirtualFrame::Enter() {
   Comment cmnt(masm(), "[ Enter JS frame");
 
 #ifdef DEBUG
+  if (FLAG_debug_code) {
     // Verify that edi contains a JS function.  The following code
     // relies on eax being available for use.
     __ test(edi, Immediate(kSmiTagMask));
@@ -463,6 +464,7 @@ void VirtualFrame::Enter() {
     __ CmpObjectType(edi, JS_FUNCTION_TYPE, eax);
     __ Check(equal,
              "VirtualFrame::Enter - edi is not a function (map check).");
+  }
 #endif
 
   EmitPush(ebp);

src/x64/virtual-frame-x64.cc

@@ -63,6 +63,7 @@ void VirtualFrame::Enter() {
   Comment cmnt(masm(), "[ Enter JS frame");
 
 #ifdef DEBUG
+  if (FLAG_debug_code) {
     // Verify that rdi contains a JS function.  The following code
     // relies on rax being available for use.
     Condition not_smi = masm()->CheckNotSmi(rdi);
@@ -71,6 +72,7 @@ void VirtualFrame::Enter() {
     __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rax);
     __ Check(equal,
              "VirtualFrame::Enter - rdi is not a function (map check).");
+  }
 #endif
 
   EmitPush(rbp);