Fix an overflow in on-stack replacement spill-slot allocation for Crankshaft.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 7c1770726f83c8e73c03939a698aeba4136a14dd..c753d0491b4905b9996b8f480fe2f4e0cc34da3c 100755
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -213,8 +213,8 @@ static bool MakeCrankshaftCode(CompilationInfo* info) {
   //
   // The encoding is as a signed value, with parameters and receiver using
   // the negative indices and locals the non-negative ones.
-  const int parameter_limit = (LUnallocated::kMaxFixedIndices / 2);
-  const int locals_limit = parameter_limit - 1;
+  const int parameter_limit = -LUnallocated::kMinFixedIndex;
+  const int locals_limit = LUnallocated::kMaxFixedIndex;
   Scope* scope = info->scope();
   if ((scope->num_parameters() + 1) > parameter_limit ||
       scope->num_stack_slots() > locals_limit) {