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.noalias annotation; frontend support (#15419)

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* .noalias annotation; frontend support

* added .noalias support to Nim; implements https://github.com/nim-lang/RFCs/issues/204
This commit is contained in:
Andreas Rumpf 2020-09-28 13:51:39 +02:00 • committed by GitHub
commit 50b6f6996a
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11 changed files with 53 additions and 12 deletions
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3
compiler/cgen.nim
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@ -503,6 +503,7 @@ proc localVarDecl(p: BProc; n: PNode): Rope =
#elif skipTypes(s.typ, abstractInst).kind in GcTypeKinds:
# decl.add(" GC_GUARD")
if sfVolatile in s.flags: result.add(" volatile")
if sfNoalias in s.flags: result.add(" NIM_NOALIAS")
result.add(" ")
result.add(s.loc.r)
else:
@ -563,6 +564,7 @@ proc assignGlobalVar(p: BProc, n: PNode; value: Rope) =
if p.hcrOn: decl.add("*")
if sfRegister in s.flags: decl.add(" register")
if sfVolatile in s.flags: decl.add(" volatile")
if sfNoalias in s.flags: decl.add(" NIM_NOALIAS")
if value != nil:
decl.addf(" $1 = $2;$n", [s.loc.r, value])
else:
@ -1261,6 +1263,7 @@ proc genVarPrototype(m: BModule, n: PNode) =
if lfDynamicLib in sym.loc.flags: m.s[cfsVars].add("*")
if sfRegister in sym.flags: m.s[cfsVars].add(" register")
if sfVolatile in sym.flags: m.s[cfsVars].add(" volatile")
if sfNoalias in sym.flags: m.s[cfsVars].add(" NIM_NOALIAS")
m.s[cfsVars].addf(" $1;$n", [sym.loc.r])
if m.hcrOn: m.initProc.procSec(cpsLocals).addf(
"\t$1 = ($2*)hcrGetGlobal($3, \"$1\");$n", [sym.loc.r,