[interpreter] Introduce fused bytecodes for common sequences.

test/cctest/interpreter/bytecode_expectations/Switch.golden

Index: test/cctest/interpreter/bytecode_expectations/Switch.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/Switch.golden b/test/cctest/interpreter/bytecode_expectations/Switch.golden
index c25214032d9a36da2c8c4aa36c10f52ccb79f86a..1314b7c07e6f7f25a29e9027c555acae900c3991 100644
--- a/test/cctest/interpreter/bytecode_expectations/Switch.golden
+++ b/test/cctest/interpreter/bytecode_expectations/Switch.golden
@@ -17,11 +17,12 @@ snippet: "
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 31
+bytecode array length: 33
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaSmi), U8(1),
   /*   42 E> */ B(Star), R(1),
+  /*   52 E> */ B(Ldar), R(1),
   /*   52 E> */ B(Star), R(0),
   /*   45 S> */ B(Star), R(2),
                 B(LdaSmi), U8(1),
@@ -53,11 +54,12 @@ snippet: "
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 37
+bytecode array length: 39
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaSmi), U8(1),
   /*   42 E> */ B(Star), R(1),
+  /*   52 E> */ B(Ldar), R(1),
   /*   52 E> */ B(Star), R(0),
   /*   45 S> */ B(Star), R(2),
                 B(LdaSmi), U8(1),
@@ -91,11 +93,12 @@ snippet: "
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 35
+bytecode array length: 37
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaSmi), U8(1),
   /*   42 E> */ B(Star), R(1),
+  /*   52 E> */ B(Ldar), R(1),
   /*   52 E> */ B(Star), R(0),
   /*   45 S> */ B(Star), R(2),
                 B(LdaSmi), U8(1),
@@ -129,11 +132,12 @@ snippet: "
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 35
+bytecode array length: 37
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaSmi), U8(1),
   /*   42 E> */ B(Star), R(1),
+  /*   52 E> */ B(Ldar), R(1),
   /*   52 E> */ B(Star), R(0),
   /*   45 S> */ B(Star), R(2),
                 B(LdaSmi), U8(2),
@@ -209,11 +213,12 @@ snippet: "
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 32
+bytecode array length: 34
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaSmi), U8(1),
   /*   42 E> */ B(Star), R(1),
+  /*   52 E> */ B(Ldar), R(1),
   /*   52 E> */ B(Star), R(0),
   /*   45 S> */ B(Star), R(2),
                 B(Ldar), R(1),
@@ -312,11 +317,12 @@ snippet: "
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 289
+bytecode array length: 291
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaSmi), U8(1),
   /*   42 E> */ B(Star), R(1),
+  /*   52 E> */ B(Ldar), R(1),
   /*   52 E> */ B(Star), R(0),
   /*   45 S> */ B(Star), R(2),
                 B(LdaSmi), U8(1),
@@ -482,11 +488,12 @@ snippet: "
 "
 frame size: 5
 parameter count: 1
-bytecode array length: 61
+bytecode array length: 63
 bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaSmi), U8(1),
   /*   42 E> */ B(Star), R(2),
+  /*   52 E> */ B(Ldar), R(2),
   /*   52 E> */ B(Star), R(0),
   /*   45 S> */ B(Star), R(3),
                 B(LdaSmi), U8(1),