diff options
Diffstat (limited to 'compiler/ccgcalls.nim')
| -rw-r--r-- | compiler/ccgcalls.nim | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/compiler/ccgcalls.nim b/compiler/ccgcalls.nim index 242e9f5cf..948f43ee1 100644 --- a/compiler/ccgcalls.nim +++ b/compiler/ccgcalls.nim @@ -249,13 +249,15 @@ proc openArrayLoc(p: BProc, formalType: PType, n: PNode): Rope = else: internalError(p.config, "openArrayLoc: " & typeToString(a.t)) proc withTmpIfNeeded(p: BProc, a: TLoc, needsTmp: bool): TLoc = - if needsTmp and a.lode.typ != nil: - var tmp: TLoc - getTemp(p, a.lode.typ, tmp, needsInit=false) - genAssignment(p, tmp, a, {}) - tmp + # Bug https://github.com/status-im/nimbus-eth2/issues/1549 + # Aliasing is preferred over stack overflows. + # Also don't regress for non ARC-builds, too risky. + if needsTmp and a.lode.typ != nil and p.config.selectedGC in {gcArc, gcOrc} and + getSize(p.config, a.lode.typ) < 1024: + getTemp(p, a.lode.typ, result, needsInit=false) + genAssignment(p, result, a, {}) else: - a + result = a proc genArgStringToCString(p: BProc, n: PNode, needsTmp: bool): Rope {.inline.} = var a: TLoc |