[interpreter] Make sure allocated registers are always materialized in the register optimizer.

test/cctest/interpreter/bytecode_expectations/ObjectLiterals.golden

Index: test/cctest/interpreter/bytecode_expectations/ObjectLiterals.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/ObjectLiterals.golden b/test/cctest/interpreter/bytecode_expectations/ObjectLiterals.golden
index 6c034c7297fdd1a90d5f436cb601757f0a05a7a4..e523bdcb19888abc1757ea70b67df94e02dfef7c 100644
--- a/test/cctest/interpreter/bytecode_expectations/ObjectLiterals.golden
+++ b/test/cctest/interpreter/bytecode_expectations/ObjectLiterals.golden
@@ -335,7 +335,7 @@ snippet: "
 "
 frame size: 5
 parameter count: 1
-bytecode array length: 40
+bytecode array length: 38
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaConstant), U8(0),
@@ -345,7 +345,6 @@ bytecodes: [
                 B(LdaSmi), I8(1),
                 B(StaDataPropertyInLiteral), R(1), R(2), U8(0), U8(5),
                 B(CreateObjectLiteral), U8(1), U8(3), U8(19), R(4),
-                B(Star), R(3),
                 B(Mov), R(1), R(2),
                 B(Mov), R(4), R(3),
                 B(CallRuntime), U16(Runtime::kInternalSetPrototype), R(2), U8(2),
@@ -365,7 +364,7 @@ snippet: "
 "
 frame size: 6
 parameter count: 1
-bytecode array length: 63
+bytecode array length: 61
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaConstant), U8(0),
@@ -374,7 +373,6 @@ bytecodes: [
   /*   60 E> */ B(ToName), R(2),
                 B(LdaConstant), U8(2),
                 B(StaDataPropertyInLiteral), R(1), R(2), U8(0), U8(6),
-                B(Star), R(3),
                 B(LdaConstant), U8(3),
                 B(Star), R(3),
                 B(CreateClosure), U8(4), U8(3), U8(2),