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IC: next steps (#16729)

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* IC: dead code elimination pass
* preparations for a different codegen strategy
* added documentation to the newly written code
* IC: backend code
* IC: backend adjustments
* optimized the compiler a bit
* IC: yet another massive refactoring
* fixes regressions
* cleanups
This commit is contained in:
Andreas Rumpf 2021-01-23 08:06:15 +01:00 • committed by GitHub
commit 8241e55023
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32 changed files with 729 additions and 323 deletions
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26
compiler/main.nim
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@ -21,6 +21,7 @@ import
modules,
modulegraphs, tables, lineinfos, pathutils, vmprofiler
import ic / cbackend
from ic / to_packed_ast import rodViewer
when not defined(leanCompiler):
@ -73,14 +74,15 @@ proc commandCompileToC(graph: ModuleGraph) =
setOutFile(conf)
extccomp.initVars(conf)
semanticPasses(graph)
registerPass(graph, cgenPass)
if conf.symbolFiles == disabledSf:
registerPass(graph, cgenPass)
if {optRun, optForceFullMake} * conf.globalOptions == {optRun} or isDefined(conf, "nimBetterRun"):
let proj = changeFileExt(conf.projectFull, "")
if not changeDetectedViaJsonBuildInstructions(conf, proj):
# nothing changed
graph.config.notes = graph.config.mainPackageNotes
return
if {optRun, optForceFullMake} * conf.globalOptions == {optRun} or isDefined(conf, "nimBetterRun"):
let proj = changeFileExt(conf.projectFull, "")
if not changeDetectedViaJsonBuildInstructions(conf, proj):
# nothing changed
graph.config.notes = graph.config.mainPackageNotes
return
if not extccomp.ccHasSaneOverflow(conf):
conf.symbols.defineSymbol("nimEmulateOverflowChecks")
@ -88,8 +90,14 @@ proc commandCompileToC(graph: ModuleGraph) =
compileProject(graph)
if graph.config.errorCounter > 0:
return # issue #9933
cgenWriteModules(graph.backend, conf)
if conf.cmd != cmdTcc:
if conf.symbolFiles == disabledSf:
cgenWriteModules(graph.backend, conf)
else:
generateCode(graph)
# graph.backend can be nil under IC when nothing changed at all:
if graph.backend != nil:
cgenWriteModules(graph.backend, conf)
if conf.cmd != cmdTcc and graph.backend != nil:
extccomp.callCCompiler(conf)
# for now we do not support writing out a .json file with the build instructions when HCR is on
if not conf.hcrOn: