[interpreter] Introduce fused bytecodes for common sequences.

test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden

Index: test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden b/test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden
index f84f1a8ed4e7ce9768465a39532f594c7e3db215..bfb879b7f12931060d05649e3ee170ea3fcd12d3 100644
--- a/test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden
+++ b/test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden
@@ -16,7 +16,7 @@ snippet: "
 "
 frame size: 9
 parameter count: 1
-bytecode array length: 73
+bytecode array length: 74
 bytecodes: [
                 B(LdaTheHole),
                 B(Star), R(1),
@@ -33,8 +33,8 @@ bytecodes: [
                 B(Star), R(5),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(2), U8(4),
                 B(Star), R(2),
-                B(LoadIC), R(2), U8(1), U8(1),
-                B(Star), R(3),
+                B(LdrNamedProperty), R(2), U8(1), U8(1), R(3),
+                B(Ldar), R(3),
                 B(Mov), R(3), R(4),
                 B(LdaConstant), U8(2),
                 B(Star), R(5),
@@ -69,7 +69,7 @@ snippet: "
 "
 frame size: 9
 parameter count: 1
-bytecode array length: 73
+bytecode array length: 74
 bytecodes: [
                 B(LdaTheHole),
                 B(Star), R(1),
@@ -86,8 +86,8 @@ bytecodes: [
                 B(Star), R(5),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(2), U8(4),
                 B(Star), R(2),
-                B(LoadIC), R(2), U8(1), U8(1),
-                B(Star), R(3),
+                B(LdrNamedProperty), R(2), U8(1), U8(1), R(3),
+                B(Ldar), R(3),
                 B(Mov), R(3), R(4),
                 B(LdaConstant), U8(2),
                 B(Star), R(5),
@@ -124,7 +124,7 @@ snippet: "
 "
 frame size: 10
 parameter count: 1
-bytecode array length: 127
+bytecode array length: 128
 bytecodes: [
                 B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
                 B(PushContext), R(2),
@@ -147,8 +147,8 @@ bytecodes: [
                 B(Star), R(6),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(3), U8(4),
                 B(Star), R(3),
-                B(LoadIC), R(3), U8(3), U8(1),
-                B(Star), R(4),
+                B(LdrNamedProperty), R(3), U8(3), U8(1), R(4),
+                B(Ldar), R(4),
                 B(Mov), R(4), R(5),
   /*   75 E> */ B(LdaContextSlot), R(context), U8(4),
                 B(ToName),
@@ -198,7 +198,7 @@ snippet: "
 "
 frame size: 7
 parameter count: 1
-bytecode array length: 74
+bytecode array length: 73
 bytecodes: [
                 B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
                 B(PushContext), R(2),
@@ -219,8 +219,7 @@ bytecodes: [
                 B(Star), R(6),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(3), U8(4),
                 B(Star), R(3),
-                B(LoadIC), R(3), U8(1), U8(1),
-                B(Star), R(4),
+                B(LdrNamedProperty), R(3), U8(1), U8(1), R(4),
                 B(CallRuntime), U16(Runtime::kToFastProperties), R(3), U8(1),
                 B(Star), R(0),
                 B(Star), R(1),