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unused constants are optimized away

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This commit is contained in:
Araq 2011-11-22 18:48:00 +01:00
commit fedc69f61a
4 changed files with 47 additions and 39 deletions
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22
compiler/ccgstmts.nim
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@ -68,16 +68,18 @@ proc genConstStmt(p: BProc, t: PNode) =
if sfFakeConst in c.flags:
genSingleVar(p, it)
elif c.typ.kind in ConstantDataTypes and lfNoDecl notin c.loc.flags and
c.ast.len != 0:
# generate the data:
fillLoc(c.loc, locData, c.typ, mangleName(c), OnUnknown)
if sfImportc in c.flags:
appf(p.module.s[cfsData], "extern NIM_CONST $1 $2;$n",
[getTypeDesc(p.module, c.typ), c.loc.r])
else:
appf(p.module.s[cfsData], "NIM_CONST $1 $2 = $3;$n",
[getTypeDesc(p.module, c.typ), c.loc.r, genConstExpr(p, c.ast)])
c.ast.len != 0:
if not emitLazily(c): requestConstImpl(p, c)
when false:
# generate the data:
fillLoc(c.loc, locData, c.typ, mangleName(c), OnUnknown)
if sfImportc in c.flags:
appf(p.module.s[cfsData], "extern NIM_CONST $1 $2;$n",
[getTypeDesc(p.module, c.typ), c.loc.r])
else:
appf(p.module.s[cfsData], "NIM_CONST $1 $2 = $3;$n",
[getTypeDesc(p.module, c.typ), c.loc.r, genConstExpr(p, c.ast)])
proc genIfStmt(p: BProc, n: PNode) =
#
# if (!expr1) goto L1;