PPC: [turbofan] Fix trampoline pool blocking.

src/compiler/ppc/code-generator-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/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/osr.h"
@@ skipping 603 matching lines @@
 }
 
 
 // Assembles an instruction after register allocation, producing machine code.
 void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
   PPCOperandConverter i(this, instr);
   ArchOpcode opcode = ArchOpcodeField::decode(instr->opcode());
 
   switch (opcode) {
     case kArchCallCodeObject: {
+      v8::internal::Assembler::BlockTrampolinePoolScope block_trampoline_pool(
+          masm());
       EnsureSpaceForLazyDeopt();
       if (HasRegisterInput(instr, 0)) {
         __ addi(ip, i.InputRegister(0),
                 Operand(Code::kHeaderSize - kHeapObjectTag));
         __ Call(ip);
       } else {
         __ Call(Handle<Code>::cast(i.InputHeapObject(0)),
                 RelocInfo::CODE_TARGET);
       }
       RecordCallPosition(instr);
@@ skipping 10 matching lines @@
         // We cannot use the constant pool to load the target since
         // we've already restored the caller's frame.
         ConstantPoolUnavailableScope constant_pool_unavailable(masm());
         __ Jump(Handle<Code>::cast(i.InputHeapObject(0)),
                 RelocInfo::CODE_TARGET);
       }
       DCHECK_EQ(LeaveRC, i.OutputRCBit());
       break;
     }
     case kArchCallJSFunction: {
+      v8::internal::Assembler::BlockTrampolinePoolScope block_trampoline_pool(
+          masm());
       EnsureSpaceForLazyDeopt();
       Register func = i.InputRegister(0);
       if (FLAG_debug_code) {
         // Check the function's context matches the context argument.
         __ LoadP(kScratchReg,
                  FieldMemOperand(func, JSFunction::kContextOffset));
         __ cmp(cp, kScratchReg);
         __ Assert(eq, kWrongFunctionContext);
       }
       __ LoadP(ip, FieldMemOperand(func, JSFunction::kCodeEntryOffset));
@@ skipping 11 matching lines @@
         __ cmp(cp, kScratchReg);
         __ Assert(eq, kWrongFunctionContext);
       }
       AssembleDeconstructActivationRecord();
       __ LoadP(ip, FieldMemOperand(func, JSFunction::kCodeEntryOffset));
       __ Jump(ip);
       DCHECK_EQ(LeaveRC, i.OutputRCBit());
       break;
     }
     case kArchLazyBailout: {
+      v8::internal::Assembler::BlockTrampolinePoolScope block_trampoline_pool(
+          masm());
       EnsureSpaceForLazyDeopt();
       RecordCallPosition(instr);
       break;
     }
     case kArchPrepareCallCFunction: {
       int const num_parameters = MiscField::decode(instr->opcode());
       __ PrepareCallCFunction(num_parameters, kScratchReg);
       break;
     }
     case kArchCallCFunction: {
@@ skipping 1000 matching lines @@
 void CodeGenerator::EnsureSpaceForLazyDeopt() {
   if (!info()->ShouldEnsureSpaceForLazyDeopt()) {
     return;
   }
 
   int space_needed = Deoptimizer::patch_size();
   // Ensure that we have enough space after the previous lazy-bailout
   // instruction for patching the code here.
   int current_pc = masm()->pc_offset();
   if (current_pc < last_lazy_deopt_pc_ + space_needed) {
+    // Block tramoline pool emission for duration of padding.
+    v8::internal::Assembler::BlockTrampolinePoolScope block_trampoline_pool(
+        masm());
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     DCHECK_EQ(0, padding_size % v8::internal::Assembler::kInstrSize);
     while (padding_size > 0) {
       __ nop();
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8