diff options
Diffstat (limited to 'lisc/live.c')
| -rw-r--r-- | lisc/live.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/lisc/live.c b/lisc/live.c index 0e59d78..d355fd6 100644 --- a/lisc/live.c +++ b/lisc/live.c @@ -18,23 +18,32 @@ liveon(Blk *b, Blk *s) return v; } +static int +phitmp(int t, Tmp *tmp) +{ + int tp; + + tp = tmp[t].phi; + return tp ? tp : t; +} + static void phifix(int t1, short *phi, Tmp *tmp) { int t, t2; - /* detect temporaries in the same - * phi-class that interfere and - * separate them + /* detect temporaries arguments + * of the same phi node that + * interfere and separate them */ - t = phirepr(tmp, t1); + t = phitmp(t1, tmp); t2 = phi[t]; if (t2 && t2 != t1) { - if (tmp[t1].phi != t1) { - tmp[t1].phi = t1; + if (t != t1) { + tmp[t1].phi = 0; t = t1; } else { - tmp[t2].phi = t2; + tmp[t2].phi = 0; phi[t2] = t2; } } @@ -115,7 +124,7 @@ Again: nlv -= BGET(b->in, i->to.val); BSET(b->gen, i->to.val); BCLR(b->in, i->to.val); - t = phirepr(f->tmp, i->to.val); + t = phitmp(i->to.val, f->tmp); phi[t] = 0; } for (m=0; m<2; m++) |