From 3c3175ca73914e299589b2e38692cd01b349d3d5 Mon Sep 17 00:00:00 2001 From: Quentin Carbonneaux Date: Wed, 19 Aug 2015 13:59:23 -0400 Subject: [PATCH] remove dead code from rega An invariant is that all registers allocated at some point have a hint. This makes the code removed by this commit dead because of the if condition testing for empty hints. --- lisc/rega.c | 15 --------------- 1 file changed, 15 deletions(-) diff --git a/lisc/rega.c b/lisc/rega.c index 585bb1e..b2d84ce 100644 --- a/lisc/rega.c +++ b/lisc/rega.c @@ -307,21 +307,6 @@ rega(Fn *fn) b = fn->rpo[n]; cur.n = 0; cur.b = (Bits){{0}}; - b1 = b; - if (b->s1 && b1->loop <= b->s1->loop) - b1 = b->s1; - if (b->s2 && b1->loop <= b->s2->loop) - b1 = b->s2; - /* try to reuse the register - * assignment of the most frequent - * successor - */ - if (b1 != b) - for (t=Tmp0; tntmp; t++) - if (tmp[t].hint == -1) - if (BGET(b->out, t)) - if ((r = rfind(&beg[b1->id], t)) != -1) - radd(&cur, t, r); for (x=0; x<2; x++) for (t=Tmp0; tntmp; t++) if (BGET(b->out, t))