Shrink and split LVT records of variables according to their liveness

Otherwise, debugger will show uninitialized values of dead variables
after resume.
 #KT-16222
 #KT-28016 Fixed
 #KT-20571 Fixed

compiler/testData/codegen/bytecodeText/coroutines/debug/localVariableCorrectLabel.kt

@@ -17,10 +17,9 @@ suspend fun SequenceScope<Int>.awaitSeq(): Int = 42
 // label numbers differ in BEs
 
 // JVM_TEMPLATES
-// 1 LOCALVARIABLE a I L[0-9]+ L20
-// 1 LINENUMBER 9 L20
+// 1 LOCALVARIABLE a I L[0-9]+ L18
+// 1 LINENUMBER 9 L19
 
 /* TODO: JVM_IR does not generate LINENUMBER at the end of the lambda */
 // JVM_IR_TEMPLATES
-// 1 LOCALVARIABLE a I L[0-9]+ L5
-// 1 LINENUMBER 8 L14
+// 1 LOCALVARIABLE a I L[0-9]+ L16

compiler/testData/codegen/bytecodeText/coroutines/debug/shrinkLvtTopLevel.kt

@@ -0,0 +1,9 @@
+suspend fun blackhole(a: Any) {}
+
+suspend fun topLevel(a: String, b: String) {
+    blackhole(a) // one spill
+    blackhole(b) // no spills
+}
+
+// 1 PUTFIELD .*L\$0 : Ljava/lang/Object;
+// 0 PUTFIELD .*L\$1 : Ljava/lang/Object;

compiler/testData/codegen/bytecodeText/coroutines/debug/thisAndResultInLvt.kt

@@ -5,37 +5,35 @@ val c: suspend () -> Unit = {
     dummy()
 }
 
+fun blackhole(a: Any) {}
+
 class A {
     suspend fun foo(a: A, s: String = "", block: suspend A.() -> Unit) {
         block()
         block()
+        blackhole(this)
+        blackhole(a)
+        blackhole(s)
+        blackhole(block)
     }
 }
 
 // BEs generate continuation classes differently, JVM_IR generates more correctly
 
+// foo, c's lambda and foo's continuation
+// 3 LOCALVARIABLE \$result Ljava/lang/Object;
+
+// foo and <init>
+// 2 LOCALVARIABLE this LA;
+// 1 LOCALVARIABLE a LA;
+// 1 LOCALVARIABLE s Ljava/lang/String;
+// 1 LOCALVARIABLE block Lkotlin/jvm/functions/Function2;
+// 1 LOCALVARIABLE \$continuation Lkotlin/coroutines/Continuation;
+
 // JVM_TEMPLATES
 // invokeSuspend
-// 1 LOCALVARIABLE this LThisAndResultInLvtKt\$c\$1; L0 L.* 0
-// c's lambda and foo's continuation
-// 2 LOCALVARIABLE \$result Ljava/lang/Object; L0 L.* 1
-
-// foo and <init>
-// 2 LOCALVARIABLE this LA; L0 L.* 0
-// 1 LOCALVARIABLE a LA; L0 L.* 1
-// 1 LOCALVARIABLE s Ljava/lang/String; L0 L.* 2
-// 1 LOCALVARIABLE block Lkotlin/jvm/functions/Function2; L0 L.* 3
-// 1 LOCALVARIABLE \$continuation Lkotlin/coroutines/Continuation; L2 L.* 6
+// 1 LOCALVARIABLE this LThisAndResultInLvtKt\$c\$1;
 
 // JVM_IR_TEMPLATES
-// <init>, invoke, invokeSuspend, create
-// 4 LOCALVARIABLE this LThisAndResultInLvtKt\$c\$1; L0 L.* 0
-// c's lambda and foo's continuation
-// 2 LOCALVARIABLE \$result Ljava/lang/Object; L0 L.* 1
-
-// foo and <init>
-// 2 LOCALVARIABLE this LA; L0 L.* 0
-// 1 LOCALVARIABLE a LA; L0 L.* 1
-// 1 LOCALVARIABLE s Ljava/lang/String; L0 L.* 2
-// 1 LOCALVARIABLE block Lkotlin/jvm/functions/Function2; L0 L.* 3
-// 1 LOCALVARIABLE \$continuation Lkotlin/coroutines/Continuation; L2 L.* 6
+// <init>, invoke, invokeSuspend
+// 3 LOCALVARIABLE this LThisAndResultInLvtKt\$c\$1; L0 L.* 0

compiler/testData/codegen/bytecodeText/coroutines/varValueConflictsWithTableSameSort.kt

@@ -19,6 +19,8 @@ fun box(): String {
         try {
             var i: String = "abc"
             i = "123"
+            // We need to use the variable, otherwise, it is considered dead.
+            println(i)
         } finally { }
 
         // This variable should take the same slot as 'i' had
@@ -40,7 +42,8 @@ fun box(): String {
 }
 
 // 1 LOCALVARIABLE i Ljava/lang/String; L.* 3
-// 1 LOCALVARIABLE s Ljava/lang/String; L.* 3
+// From liveness point of view, 's' is dead between 'println' and 's == "OK"', thus the range is split
+// 2 LOCALVARIABLE s Ljava/lang/String; L.* 3
 // 1 PUTFIELD VarValueConflictsWithTableSameSortKt\$box\$1.L\$0 : Ljava/lang/Object;
 /* 1 load in the catch (e: Throwable) { throw e } block which is implicitly wrapped around try/finally */
 // 1 ALOAD 3\s+ATHROW
@@ -48,7 +51,7 @@ fun box(): String {
 // 1 ALOAD 3\s+PUTFIELD kotlin/jvm/internal/Ref\$ObjectRef\.element
 /* 1 load in spill */
 // 1 ALOAD 3\s+PUTFIELD VarValueConflictsWithTableSameSortKt\$box\$1\.L\$0 : Ljava/lang/Object;
-/* 1 load in println(s) */
-// 1 ALOAD 3\s+INVOKEVIRTUAL java/io/PrintStream.println \(Ljava/lang/Object;\)V
+/* 2 loads in println(s) */
+// 2 ALOAD 3\s+INVOKEVIRTUAL java/io/PrintStream.println \(Ljava/lang/Object;\)V
 /* But no further load when spilling 's' to the continuation */
-// 4 ALOAD 3
+// 5 ALOAD 3