sbt:scoverage-test> show Compile / compile / scalacOptions
[info] Compile / compile / scalacOptions
[info]  List(
[info]    -Xplugin:/my/path/to-plugin/2.0.0-M4/scalac-scoverage-plugin_2.13.6-2.0.0-M4.jar,
[info]    -P:scoverage:dataDir:/path-to-my-project/target/scala-2.13/scoverage-data,
[info]    -P:scoverage:sourceRoot:/path-to-my-project/scoverage-test,
[info]    -P:scoverage:reportTestName
[info]  )

 def isTwo(num: Int): Boolean =
  if (num == 2) {
    true
  } else {
    false
  }

case i: If =>
  treeCopy.If(
    i,
    process(i.cond),
    instrument(process(i.thenp), i.thenp, branch = true),
    instrument(process(i.elsep), i.elsep, branch = true)
  )

  def isTwo(num: Int): Boolean = if ({
    scoverage.Invoker.invoked(
      1,
      "/var/folders/fq/nx_jsnyd6550xp03czx898d40000gn/T/",
      scoverage.Invoker.invoked$default$3()
    );
    num.==(2)
  }) {
    scoverage.Invoker.invoked(
      3,
      "/var/folders/fq/nx_jsnyd6550xp03czx898d40000gn/T/",
      scoverage.Invoker.invoked$default$3()
    );
    {
      scoverage.Invoker.invoked(
        2,
        "/var/folders/fq/nx_jsnyd6550xp03czx898d40000gn/T/",
        scoverage.Invoker.invoked$default$3()
      );
      true
    }
  } else {
    scoverage.Invoker.invoked(
      5,
      "/var/folders/fq/nx_jsnyd6550xp03czx898d40000gn/T/",
      scoverage.Invoker.invoked$default$3()
    );
    {
      scoverage.Invoker.invoked(
        4,
        "/var/folders/fq/nx_jsnyd6550xp03czx898d40000gn/T/",
        scoverage.Invoker.invoked$default$3()
      );
      false
    }
  };

1                                                       <-- id
a/src/main/scala/mypackage/BasicControlStructures.scala <-- source path
a                           <-- package name
BasicControlStructures      <-- class name
Object                      <-- class type
a.BasicControlStructures    <-- full class name
isTwo                       <-- method name
74                          <-- start offset
79                          <-- end offset
5                           <-- line number
scala.Int.==                <-- symbol name
Apply                       <-- tree name
false                       <-- is branch
0                           <-- invocations count
false                       <-- is ignored
num.==(2)                   <-- sign

1 a.basiccontrolstructuresspec
9 a.basiccontrolstructuresspec
4 a.basiccontrolstructuresspec
8 a.basiccontrolstructuresspec
7 a.basiccontrolstructuresspec

lazy val bin212 =
  Seq(
    defaultScala212,
    "2.12.14",
    "2.12.13",
    "2.12.12",
    "2.12.11",
    "2.12.10",
    "2.12.9",
    "2.12.8"
  )
lazy val bin213 =
  Seq(
    defaultScala213,
    "2.13.6",
    "2.13.5",
    "2.13.4",
    "2.13.3",
    "2.13.2",
    "2.13.1",
    "2.13.0"
  )

❯ scala3-compiler -Xshow-phases
parser
typer
inlinedPositions
sbt-deps
extractSemanticDB
posttyper
prepjsinterop
sbt-api
SetRootTree
pickler
inlining
postInlining
staging
pickleQuotes
{firstTransform, checkReentrant, elimPackagePrefixes, cookComments, checkStatic, betaReduce, inlineVals, expandSAMs}
initChecker
{elimRepeated, protectedAccessors, extmethods, uncacheGivenAliases, byNameClosures, hoistSuperArgs, specializeApplyMethods, refchecks, tryCatchPatterns, patternMatcher}
{elimOpaque, explicitJSClasses, explicitOuter, explicitSelf, elimByName, stringInterpolatorOpt}
{pruneErasedDefs, uninitializedDefs, inlinePatterns, vcInlineMethods, seqLiterals, intercepted, getters, specializeFunctions, liftTry, collectNullableFields, elimOuterSelect, resolveSuper, functionXXLForwarders, paramForwarding, genericTuples, letOverApply, arrayConstructors}
erasure
{elimErasedValueType, pureStats, vcElideAllocations, arrayApply, addLocalJSFakeNews, elimPolyFunction, tailrec, completeJavaEnums, mixin, lazyVals, memoize, nonLocalReturns, capturedVars}
{constructors, instrumentation}
{lambdaLift, elimStaticThis, countOuterAccesses}
{dropOuterAccessors, checkNoSuperThis, flatten, renameLifted, transformWildcards, moveStatic, expandPrivate, restoreScopes, selectStatic, junitBootstrappers, Collect entry points, collectSuperCalls, repeatableAnnotations}
genSJSIR
genBCode

❯ scala3-compiler -Xshow-phases
...
SetRootTree
+ coverage
pickler
inlining
...

case tree: Literal => instrument(tree)
case tree: New => instrument(tree)
case tree: This => instrument(tree)
case tree: Super => instrument(tree)
case Select(qual, _) if (qual.symbol.exists && qual.symbol.is(JavaDefined)) =>
case tree: Select =>
  if (tree.qualifier.isInstanceOf[New]) {
    instrument(tree)
  } else {
    ...
  }

case tree: Import => tree
case tree: Ident if (isWildcardArg(tree)) => tree

object Main {
  def ourFunction(a: Int, b: Int, c: Int) = ???
}
 
Main.ourFunction(1, thisThrows(2), someOtherComputation())

val x0 = Main
val x1 = 1
val x2 = thisThrows(2)
val x3 = someOtherComputation()
 
x0.ourFunction(x1, x2, x3)

val x0 = doThing()
 
true || x0