Never call MacroAssembler::Allocate() with incorrect size.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index ef72560b012553ede2f4c4a20bd041d3bb32b711..ac2783cacc47bb7c28a703f7d8cc84fb01dca377 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -5333,7 +5333,8 @@ void LCodeGen::DoAllocate(LAllocate* instr) {
   }
   if (instr->size()->IsConstantOperand()) {
     int32_t size = ToInteger32(LConstantOperand::cast(instr->size()));
-    if (size <= Page::kMaxRegularHeapObjectSize) {
+    if (static_cast<uint32_t>(size) <=
+        static_cast<uint32_t>(Page::kMaxRegularHeapObjectSize)) {
       __ Allocate(size, result, scratch, scratch2, deferred->entry(), flags);
     } else {
       __ jmp(deferred->entry());