diff options
Diffstat (limited to 'compiler/ccgexprs.nim')
| -rw-r--r-- | compiler/ccgexprs.nim | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/compiler/ccgexprs.nim b/compiler/ccgexprs.nim index 003b3e240..73cc2c8a1 100644 --- a/compiler/ccgexprs.nim +++ b/compiler/ccgexprs.nim @@ -729,6 +729,15 @@ proc genDeref(p: BProc, e: PNode, d: var TLoc) = else: putIntoDest(p, d, e, "(*$1)" % [rdLoc(a)], a.storage) +proc cow(p: BProc; n: PNode) = + if n.kind == nkHiddenAddr and optSeqDestructors in p.config.globalOptions: + if n[0].kind == nkBracketExpr: + let strCandidate = n[0][0] + if strCandidate.typ.skipTypes(abstractInst).kind == tyString: + var a: TLoc + initLocExpr(p, strCandidate, a) + linefmt(p, cpsStmts, "#nimPrepareStrMutationV2($1);$n", [byRefLoc(p, a)]) + proc genAddr(p: BProc, e: PNode, d: var TLoc) = # careful 'addr(myptrToArray)' needs to get the ampersand: if e[0].typ.skipTypes(abstractInstOwned).kind in {tyRef, tyPtr}: @@ -2699,9 +2708,11 @@ proc expr(p: BProc, n: PNode, d: var TLoc) = of nkReturnStmt: genReturnStmt(p, n) of nkBreakStmt: genBreakStmt(p, n) of nkAsgn: + cow(p, n[1]) if nfPreventCg notin n.flags: genAsgn(p, n, fastAsgn=false) of nkFastAsgn: + cow(p, n[1]) if nfPreventCg notin n.flags: # transf is overly aggressive with 'nkFastAsgn', so we work around here. # See tests/run/tcnstseq3 for an example that would fail otherwise. |