diff options
Diffstat (limited to 'lisc/live.c')
| -rw-r--r-- | lisc/live.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lisc/live.c b/lisc/live.c index 64fcf6a..c3aae86 100644 --- a/lisc/live.c +++ b/lisc/live.c @@ -21,7 +21,7 @@ filllive(Fn *f) Blk *b; Ins *i; Phi *p; - int z, n, chg, nlv; + int z, m, n, chg, nlv; uint a; Bits tb; @@ -50,7 +50,15 @@ Again: bset(b->jmp.arg, b, &nlv); b->nlive = nlv; for (i=&b->ins[b->nins]; i!=b->ins;) { - i--; + if ((--i)->op == OCall) { + b->in.t[0] &= ~calldef(*i, &m); + nlv -= m; + if (nlv + NRSave > b->nlive) + b->nlive = nlv + NRSave; + b->in.t[0] |= calluse(*i, &m); + nlv += m; + bset(i->arg[0], b, &nlv); + } if (!req(i->to, R)) { assert(rtype(i->to) == RTmp); nlv -= BGET(b->in, i->to.val); |