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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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12
compiler/sem.nim
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@ -17,10 +17,7 @@ import
intsets, transf, vmdef, vm, aliases, cgmeth, lambdalifting,
evaltempl, patterns, parampatterns, sempass2, linter, semmacrosanity,
lowerings, plugins/active, lineinfos, strtabs, int128,
isolation_check, typeallowed
from modulegraphs import ModuleGraph, PPassContext, onUse, onDef, onDefResolveForward,
systemModuleSym, semtab, getBody, someSym, allSyms
isolation_check, typeallowed, modulegraphs, enumtostr
when defined(nimfix):
import nimfix/prettybase
@ -84,7 +81,7 @@ proc fitNodePostMatch(c: PContext, formal: PType, arg: PNode): PNode =
if x.kind in {nkPar, nkTupleConstr, nkCurly} and formal.kind != tyUntyped:
changeType(c, x, formal, check=true)
result = arg
result = skipHiddenSubConv(result, c.idgen)
result = skipHiddenSubConv(result, c.graph, c.idgen)
proc fitNode(c: PContext, formal: PType, arg: PNode; info: TLineInfo): PNode =
@ -138,7 +135,10 @@ proc commonType*(c: PContext; x, y: PType): PType =
let aEmpty = isEmptyContainer(a[i])
let bEmpty = isEmptyContainer(b[i])
if aEmpty != bEmpty:
if nt.isNil: nt = copyType(a, nextTypeId(c.idgen), a.owner)
if nt.isNil:
nt = copyType(a, nextTypeId(c.idgen), a.owner)
copyTypeProps(c.graph, c.idgen.module, nt, a)
nt[i] = if aEmpty: b[i] else: a[i]
if not nt.isNil: result = nt
#elif b[idx].kind == tyEmpty: return x