[Ignition] Teach CompileLazy about interpreted functions.

src/builtins/mips/builtins-mips.cc

Index: src/builtins/mips/builtins-mips.cc
diff --git a/src/builtins/mips/builtins-mips.cc b/src/builtins/mips/builtins-mips.cc
index 2586a6c081ba614d63bc0290aaf5e0c4b72edbea..fb08099ab3893103703db2976c39d45830b2acea 100644
--- a/src/builtins/mips/builtins-mips.cc
+++ b/src/builtins/mips/builtins-mips.cc
@@ -1452,13 +1452,13 @@ void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
   __ And(t1, t1,
          Operand(1 << SharedFunctionInfo::kMarkedForTierUpBitWithinByte));
   __ Branch(&gotta_call_runtime_no_stack, ne, t1, Operand(zero_reg));
-  // Is the full code valid?
+
+  // If SFI points to anything other than CompileLazy, install that.
   __ lw(entry, FieldMemOperand(entry, SharedFunctionInfo::kCodeOffset));
-  __ lw(t1, FieldMemOperand(entry, Code::kFlagsOffset));
-  __ And(t1, t1, Operand(Code::KindField::kMask));
-  __ srl(t1, t1, Code::KindField::kShift);
-  __ Branch(&gotta_call_runtime_no_stack, eq, t1, Operand(Code::BUILTIN));
-  // Yes, install the full code.
+  __ Move(t1, masm->CodeObject());
+  __ Branch(&gotta_call_runtime_no_stack, eq, entry, Operand(t1));
+
+  // Install the SFI's code entry.
   __ Addu(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ sw(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset));
   __ RecordWriteCodeEntryField(closure, entry, t1);