VM profiler (#14833)

* Crude VM profiler

* Added --profileVM flag, refactoring

* fixed FileLine hash

* Use TLineInfo instead of own FileLine, updated formatting

* Refactoring, moved PStackFrame to vmdefs for cleaner data structure

* Moved vmprofiler to separate file

* Simplified TLineInfo hash, use toFileLineCol for output

* Hash

* Moved profile data into Config, dump only once at end of run

* Changed profile output header to show '#instr' instead of 'count'

* Do not accumulate instrcount for non-top frames

Co-authored-by: Ico Doornekamp <git@zevv.nl>

compiler/lineinfos.nim

@@ -10,7 +10,7 @@
 ## This module contains the ``TMsgKind`` enum as well as the
 ## ``TLineInfo`` object.
 
-import ropes, tables, pathutils
+import ropes, tables, pathutils, hashes
 
 const
   explanationsBaseUrl* = "https://nim-lang.github.io/Nim"
@@ -271,6 +271,9 @@ type
 
 proc `==`*(a, b: FileIndex): bool {.borrow.}
 
+proc hash*(i: TLineInfo): Hash =
+  hash (i.line.int, i.col.int, i.fileIndex.int)
+
 proc raiseRecoverableError*(msg: string) {.noinline.} =
   raise newException(ERecoverableError, msg)