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

src/compiler/mips/code-generator-mips.cc

Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc b/src/compiler/mips/code-generator-mips.cc
index 12154a9e5a9b40f37726bcb4028b3f785aa7a9c0..7cf7927ab3facc144bf895103fb36b5c908df1ca 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -496,6 +496,9 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
     case kMipsXor:
       __ Xor(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;
+    case kMipsClz:
+      __ Clz(i.OutputRegister(), i.InputRegister(0));
+      break;
     case kMipsShl:
       if (instr->InputAt(1)->IsRegister()) {
         __ sllv(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));