PPC: [turbofan] Turn Math.clz32 into an inlinable builtin.

src/compiler/ppc/instruction-selector-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/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 719 matching lines @@
 
 
 #if V8_TARGET_ARCH_PPC64
 // TODO(mbrandy): Absorb logical-and into rldic?
 void InstructionSelector::VisitWord64Ror(Node* node) {
   VisitRRO(this, node, kPPC_RotRight64, kShift64Imm);
 }
 #endif
 
 
+void InstructionSelector::VisitWord32Clz(Node* node) {
+  PPCOperandGenerator g(this);
+  Emit(kPPC_Cntlz32, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitInt32Add(Node* node) {
   VisitBinop<Int32BinopMatcher>(this, node, kPPC_Add32, kInt16Imm);
 }
 
 
 #if V8_TARGET_ARCH_PPC64
 void InstructionSelector::VisitInt64Add(Node* node) {
   VisitBinop<Int64BinopMatcher>(this, node, kPPC_Add64, kInt16Imm);
 }
 #endif
@@ skipping 749 matching lines @@
          MachineOperatorBuilder::kFloat64Min |
          MachineOperatorBuilder::kFloat64RoundDown |
          MachineOperatorBuilder::kFloat64RoundTruncate |
          MachineOperatorBuilder::kFloat64RoundTiesAway;
   // We omit kWord32ShiftIsSafe as s[rl]w use 0x3f as a mask rather than 0x1f.
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8