[crankshaft] Added checks to tail call instructions that we don't have to restore caller doubles.

src/crankshaft/mips/lithium-codegen-mips.cc

Index: src/crankshaft/mips/lithium-codegen-mips.cc
diff --git a/src/crankshaft/mips/lithium-codegen-mips.cc b/src/crankshaft/mips/lithium-codegen-mips.cc
index eecf7d4c049714af364bba210c050c62fed4d830..5aa054c682c020db8a496f119760093997c9d861 100644
--- a/src/crankshaft/mips/lithium-codegen-mips.cc
+++ b/src/crankshaft/mips/lithium-codegen-mips.cc
@@ -3121,6 +3121,7 @@ void LCodeGen::DoApplyArguments(LApplyArguments* instr) {
 
   InvokeFlag flag = CALL_FUNCTION;
   if (instr->hydrogen()->tail_call_mode() == TailCallMode::kAllow) {
+    DCHECK(!info()->saves_caller_doubles());
     // TODO(ishell): drop current frame before pushing arguments to the stack.
     flag = JUMP_FUNCTION;
     ParameterCount actual(a0);
@@ -3617,6 +3618,7 @@ void LCodeGen::DoInvokeFunction(LInvokeFunction* instr) {
   bool is_tail_call = hinstr->tail_call_mode() == TailCallMode::kAllow;
 
   if (is_tail_call) {
+    DCHECK(!info()->saves_caller_doubles());
     ParameterCount actual(instr->arity());
     // It is safe to use t0, t1 and t2 as scratch registers here given that
     // we are not going to return to caller function anyway.