Bailout for large object allocations in full code EmitFastOneByteArrayJoin.

src/full-codegen/ppc/full-codegen-ppc.cc

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index 2ae5f674514c6baf0b9794ee2d37d6ad06276483..dadaebd3650493dd2820b1292e921681299cecaa 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -4261,6 +4261,10 @@ void FullCodeGenerator::EmitFastOneByteArrayJoin(CallRuntime* expr) {
   __ BranchOnOverflow(&bailout);
   __ SmiUntag(string_length);
 
+  // Bailout for large object allocations.
+  __ cmpi(string_length, Operand(Page::kMaxRegularHeapObjectSize));
+  __ bgt(&bailout);
+
   // Get first element in the array to free up the elements register to be used
   // for the result.
   __ addi(element, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));