Fix MIPS switch statement breakage.

src/mips/full-codegen-mips.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 1021 matching lines @@
 
       __ bind(&slow_case);
     }
 
     // Record position before stub call for type feedback.
     SetSourcePosition(clause->position());
     Handle<Code> ic = CompareIC::GetUninitialized(isolate(), Token::EQ_STRICT);
     CallIC(ic, RelocInfo::CODE_TARGET, clause->CompareId());
     patch_site.EmitPatchInfo();
 
+    Label skip;
+    __ b(&skip);
+    PrepareForBailout(clause, TOS_REG);
+    __ LoadRoot(at, Heap::kTrueValueRootIndex);
+    __ Branch(&next_test, ne, v0, Operand(zero_reg));

[Toon Verwaest, 2013/12/18 15:14:16]

Probably should compare v0 with at.

[Hannes Payer (out of office), 2013/12/18 15:18:03]

Done.

+    __ Drop(1);
+    __ jmp(clause->body_target());
+    __ bind(&skip);
+
     __ Branch(&next_test, ne, v0, Operand(zero_reg));
     __ Drop(1);  // Switch value is no longer needed.
     __ Branch(clause->body_target());
   }
 
   // Discard the test value and jump to the default if present, otherwise to
   // the end of the statement.
   __ bind(&next_test);
   __ Drop(1);  // Switch value is no longer needed.
   if (default_clause == NULL) {
@@ skipping 3907 matching lines @@
       Assembler::target_address_at(pc_immediate_load_address)) ==
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OsrAfterStackCheck()->entry()));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS