Add asserts to ensure that we:

src/mips/regexp-macro-assembler-mips.cc

 // Copyright 2006-2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 359 matching lines @@
     __ Addu(a0, a0, Operand(end_of_input_address()));
     // Length of capture.
     __ mov(a2, a1);
     // Save length in callee-save register for use on return.
     __ mov(s3, a1);
     // Address of current input position.
     __ Addu(a1, current_input_offset(), Operand(end_of_input_address()));
     // Isolate.
     __ li(a3, Operand(ExternalReference::isolate_address()));
 
-    ExternalReference function =
-        ExternalReference::re_case_insensitive_compare_uc16(masm_->isolate());
-    __ CallCFunction(function, argument_count);
+    {
+      AllowExternalCallThatCantCauseGC scope(masm_);
+      ExternalReference function =
+          ExternalReference::re_case_insensitive_compare_uc16(masm_->isolate());
+      __ CallCFunction(function, argument_count);
+    }
 
     // Restore regexp engine registers.
     __ MultiPop(regexp_registers_to_retain);
     __ li(code_pointer(), Operand(masm_->CodeObject()));
     __ lw(end_of_input_address(), MemOperand(frame_pointer(), kInputEnd));
 
     // Check if function returned non-zero for success or zero for failure.
     BranchOrBacktrack(on_no_match, eq, v0, Operand(zero_reg));
     // On success, increment position by length of capture.
     __ Addu(current_input_offset(), current_input_offset(), Operand(s3));
@@ skipping 207 matching lines @@
     // If the code gets corrupted due to long regular expressions and lack of
     // space on trampolines, an internal exception flag is set. If this case
     // is detected, we will jump into exit sequence right away.
     __ bind_to(&entry_label_, internal_failure_label_.pos());
   } else {
     // Finalize code - write the entry point code now we know how many
     // registers we need.
 
     // Entry code:
     __ bind(&entry_label_);
+
+    // Tell the system that we have a stack frame.  Because the type is MANUAL,
+    // no is generated.
+    FrameScope scope(masm_, StackFrame::MANUAL);
+
+    // Actually emit code to start a new stack frame.
     // Push arguments
     // Save callee-save registers.
     // Start new stack frame.
     // Store link register in existing stack-cell.
     // Order here should correspond to order of offset constants in header file.
     RegList registers_to_retain = s0.bit() | s1.bit() | s2.bit() |
         s3.bit() | s4.bit() | s5.bit() | s6.bit() | s7.bit() | fp.bit();
     RegList argument_registers = a0.bit() | a1.bit() | a2.bit() | a3.bit();
     __ MultiPush(argument_registers | registers_to_retain | ra.bit());
     // Set frame pointer in space for it if this is not a direct call
@@ skipping 635 matching lines @@
 }
 
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS