PPC: Ensure predictable code size at map_check in LCodeGen::DoInstanceOfKnownGlobal.

src/ppc/lithium-codegen-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/cpu-profiler.h"
@@ skipping 2867 matching lines @@
   // A Smi is not instance of anything.
   __ JumpIfSmi(object, &false_result);
 
   // This is the inlined call site instanceof cache. The two occurences of the
   // hole value will be patched to the last map/result pair generated by the
   // instanceof stub.
   Label cache_miss;
   Register map = temp;
   __ LoadP(map, FieldMemOperand(object, HeapObject::kMapOffset));
   {
-    // Block constant pool emission to ensure the positions of instructions are
+    // Block trampoline emission to ensure the positions of instructions are
     // as expected by the patcher. See InstanceofStub::Generate().
     Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_);
     __ bind(deferred->map_check());  // Label for calculating code patching.
     // We use Factory::the_hole_value() on purpose instead of loading from the
     // root array to force relocation to be able to later patch with
     // the cached map.
     Handle<Cell> cell = factory()->NewCell(factory()->the_hole_value());
     __ mov(ip, Operand(cell));
     __ LoadP(ip, FieldMemOperand(ip, Cell::kValueOffset));
     __ cmp(map, ip);
-    __ bne(&cache_miss);
+    __ bc_short(ne, &cache_miss);
     // We use Factory::the_hole_value() on purpose instead of loading from the
     // root array to force relocation to be able to later patch
     // with true or false.
     __ mov(result, Operand(factory()->the_hole_value()));
   }
   __ b(&done);
 
   // The inlined call site cache did not match. Check null and string before
   // calling the deferred code.
   __ bind(&cache_miss);
@@ skipping 3291 matching lines @@
   __ Push(scope_info);
   __ push(ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 }
 }  // namespace v8::internal