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Dead code elimination for entire modules and their init procs if empty (#10032)

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* fixes #9798
* Change order of write modules
* Move datInit calls ahead of initStackBottom
This commit is contained in:
cooldome 2018-12-30 10:28:12 +00:00 • committed by Andreas Rumpf
commit 82c009a2cb
6 changed files with 176 additions and 99 deletions
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10
compiler/cgendata.nim
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@ -32,6 +32,7 @@ type
cfsData, # section for C constant data
cfsProcs, # section for C procs that are not inline
cfsInitProc, # section for the C init proc
cfsDatInitProc, # section for the C datInit proc
cfsTypeInit1, # section 1 for declarations of type information
cfsTypeInit2, # section 2 for init of type information
cfsTypeInit3, # section 3 for init of type information
@ -112,6 +113,7 @@ type
mainModProcs*, mainModInit*, otherModsInit*, mainDatInit*: Rope
mapping*: Rope # the generated mapping file (if requested)
modules*: seq[BModule] # list of all compiled modules
modules_closed*: seq[BModule] # list of the same compiled modules, but in the order they were closed
forwardedProcs*: seq[PSym] # proc:s that did not yet have a body
generatedHeader*: BModule
breakPointId*: int
@ -191,8 +193,6 @@ proc newModuleList*(g: ModuleGraph): BModuleList =
graph: g, nimtvDeclared: initIntSet())
iterator cgenModules*(g: BModuleList): BModule =
for m in g.modules:
# ultimately, we are iterating over the file ids here.
# some "files" won't have an associated cgen module (like stdin)
# and we must skip over them.
if m != nil: yield m
for m in g.modules_closed:
# iterate modules in the order they were closed
yield m