reland 16744: add context save for GenerateFastApiCall

src/arm/code-stubs-arm.cc

 // Copyright 2012 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 2824 matching lines @@
   // Lower 2 bits of r2 are 0 iff r0 has failure tag.
   __ add(r2, r0, Operand(1));
   __ tst(r2, Operand(kFailureTagMask));
   __ b(eq, &failure_returned);
 
   // Exit C frame and return.
   // r0:r1: result
   // sp: stack pointer
   // fp: frame pointer
   //  Callee-saved register r4 still holds argc.
-  __ LeaveExitFrame(save_doubles_, r4);
+  __ LeaveExitFrame(save_doubles_, r4, true);
   __ mov(pc, lr);
 
   // check if we should retry or throw exception
   Label retry;
   __ bind(&failure_returned);
   STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0);
   __ tst(r0, Operand(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize));
   __ b(eq, &retry);
 
   // Special handling of out of memory exceptions.
@@ skipping 1208 matching lines @@
   // Already there
 
   // Argument 1 (r0): Subject string.
   __ mov(r0, subject);
 
   // Locate the code entry and call it.
   __ add(r7, r7, Operand(Code::kHeaderSize - kHeapObjectTag));
   DirectCEntryStub stub;
   stub.GenerateCall(masm, r7);
 
-  __ LeaveExitFrame(false, no_reg);
+  __ LeaveExitFrame(false, no_reg, true);
 
   // r0: result
   // subject: subject string (callee saved)
   // regexp_data: RegExp data (callee saved)
   // last_match_info_elements: Last match info elements (callee saved)
   // Check the result.
   Label success;
   __ cmp(r0, Operand(1));
   // We expect exactly one result since we force the called regexp to behave
   // as non-global.
@@ skipping 3069 matching lines @@
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM