[builtins] Introduce proper Float64Cos and Float64Sin.

src/crankshaft/ia32/lithium-ia32.cc

Index: src/crankshaft/ia32/lithium-ia32.cc
diff --git a/src/crankshaft/ia32/lithium-ia32.cc b/src/crankshaft/ia32/lithium-ia32.cc
index 22e923e86899bd91e7247940e44acb07ad43bb09..51295a473fa9087f2a2946fb21a64278407e330d 100644
--- a/src/crankshaft/ia32/lithium-ia32.cc
+++ b/src/crankshaft/ia32/lithium-ia32.cc
@@ -1093,6 +1093,8 @@ LInstruction* LChunkBuilder::DoInvokeFunction(HInvokeFunction* instr) {
 
 LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
   switch (instr->op()) {
+    case kMathCos:
+      return DoMathCos(instr);
     case kMathFloor:
       return DoMathFloor(instr);
     case kMathRound:
@@ -1111,6 +1113,8 @@ LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
       return DoMathPowHalf(instr);
     case kMathClz32:
       return DoMathClz32(instr);
+    case kMathSin:
+      return DoMathSin(instr);
     default:
       UNREACHABLE();
       return NULL;
@@ -1177,6 +1181,19 @@ LInstruction* LChunkBuilder::DoMathClz32(HUnaryMathOperation* instr) {
   return DefineAsRegister(result);
 }
 
+LInstruction* LChunkBuilder::DoMathCos(HUnaryMathOperation* instr) {
+  DCHECK(instr->representation().IsDouble());
+  DCHECK(instr->value()->representation().IsDouble());
+  LOperand* input = UseRegisterAtStart(instr->value());
+  return MarkAsCall(DefineSameAsFirst(new (zone()) LMathCos(input)), instr);
+}
+
+LInstruction* LChunkBuilder::DoMathSin(HUnaryMathOperation* instr) {
+  DCHECK(instr->representation().IsDouble());
+  DCHECK(instr->value()->representation().IsDouble());
+  LOperand* input = UseRegisterAtStart(instr->value());
+  return MarkAsCall(DefineSameAsFirst(new (zone()) LMathSin(input)), instr);
+}
 
 LInstruction* LChunkBuilder::DoMathExp(HUnaryMathOperation* instr) {
   DCHECK(instr->representation().IsDouble());