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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
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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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8
compiler/pragmas.nim
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@ -65,14 +65,15 @@ const
wInheritable, wGensym, wInject, wRequiresInit, wUnchecked, wUnion, wPacked,
wBorrow, wGcSafe, wPartial, wExplain, wPackage}
fieldPragmas* = declPragmas + {
wGuard, wBitsize, wCursor, wRequiresInit} - {wExportNims, wNodecl} # why exclude these?
wGuard, wBitsize, wCursor, wRequiresInit, wNoalias} - {wExportNims, wNodecl} # why exclude these?
varPragmas* = declPragmas + {wVolatile, wRegister, wThreadVar,
wMagic, wHeader, wCompilerProc, wCore, wDynlib,
wNoInit, wCompileTime, wGlobal,
wGensym, wInject, wCodegenDecl, wGuard, wGoto, wCursor}
wGensym, wInject, wCodegenDecl, wGuard, wGoto, wCursor, wNoalias}
constPragmas* = declPragmas + {wHeader, wMagic,
wGensym, wInject,
wIntDefine, wStrDefine, wBoolDefine, wCompilerProc, wCore}
paramPragmas* = {wNoalias, wInject, wGensym}
letPragmas* = varPragmas
procTypePragmas* = {FirstCallConv..LastCallConv, wVarargs, wNoSideEffect,
wThread, wRaises, wLocks, wTags, wGcSafe,
@ -864,6 +865,9 @@ proc singlePragma(c: PContext, sym: PSym, n: PNode, i: var int,
of wRegister:
noVal(c, it)
incl(sym.flags, sfRegister)
of wNoalias:
noVal(c, it)
incl(sym.flags, sfNoalias)
of wThreadVar:
noVal(c, it)
incl(sym.flags, {sfThread, sfGlobal})