diff options
Diffstat (limited to 'ssa.c')
| -rw-r--r-- | ssa.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/ssa.c b/ssa.c index 8a28eeb..632ebbe 100644 --- a/ssa.c +++ b/ssa.c @@ -31,7 +31,7 @@ adduse(Tmp *tmp, int ty, Blk *b, ...) va_end(ap); } -/* fill usage, phi, and class information +/* fill usage, width, phi, and class information * must not change .visit fields */ void @@ -40,7 +40,7 @@ filluse(Fn *fn) Blk *b; Phi *p; Ins *i; - int m, t; + int m, t, w; uint a; Tmp *tmp; @@ -51,6 +51,7 @@ filluse(Fn *fn) tmp[t].nuse = 0; tmp[t].phi = 0; tmp[t].cls = 0; + tmp[t].width = WFull; if (tmp[t].use == 0) tmp[t].use = vnew(0, sizeof(Use), Pfn); } @@ -72,7 +73,16 @@ filluse(Fn *fn) for (i=b->ins; i-b->ins < b->nins; i++) { if (!req(i->to, R)) { assert(rtype(i->to) == RTmp); + w = WFull; + if (isload(i->op) && i->op != Oload) + w = Wsb + (i->op - Oloadsb); + if (isext(i->op)) + w = Wsb + (i->op - Oextsb); + if (w == Wsw || w == Wuw) + if (i->cls == Kw) + w = WFull; t = i->to.val; + tmp[t].width = w; tmp[t].ndef++; tmp[t].cls = i->cls; } |