diff options
Diffstat (limited to 'isel.c')
| -rw-r--r-- | isel.c | 48 |
1 files changed, 23 insertions, 25 deletions
@@ -35,7 +35,7 @@ static int fcmptoi(int fc) { switch (fc) { - default: diag("isel: fcmptoi defaulted"); + default: die("invalid fp comparison %d", fc); case FCle: return ICule; case FClt: return ICult; case FCgt: return ICugt; @@ -85,8 +85,6 @@ noimm(Ref r, Fn *fn) if (rtype(r) != RCon) return 0; switch (fn->con[r.val].type) { - default: - diag("isel: invalid constant"); case CAddr: /* we only support the 'small' * code model of the ABI, this @@ -97,6 +95,8 @@ noimm(Ref r, Fn *fn) case CBits: val = fn->con[r.val].bits.i; return (val < INT32_MIN || val > INT32_MAX); + default: + die("invalid constant"); } } @@ -208,7 +208,7 @@ sel(Ins i, ANum *an, Fn *fn) { Ref r0, r1; int x, k, kc; - int64_t val; + int64_t sz; Ins *i0; if (rtype(i.to) == RTmp) @@ -308,12 +308,11 @@ Emit: * (rsp = 0) mod 16 */ if (rtype(i.arg[0]) == RCon) { - assert(fn->con[i.arg[0].val].type == CBits); - val = fn->con[i.arg[0].val].bits.i; - val = (val + 15) & ~INT64_C(15); - if (val < 0 || val > INT32_MAX) - diag("isel: alloc too large"); - emit(OSAlloc, Kl, i.to, getcon(val, fn), R); + sz = fn->con[i.arg[0].val].bits.i; + if (sz < 0 || sz >= INT_MAX-15) + err("invalid alloc size %"PRId64, sz); + sz = (sz + 15) & -16; + emit(OSAlloc, Kl, i.to, getcon(sz, fn), R); } else { /* r0 = (i.arg[0] + 15) & -16 */ r0 = newtmp("isel", Kl, fn); @@ -335,13 +334,13 @@ Emit: selcmp(i.arg, kc, fn); break; } - diag("isel: non-exhaustive implementation"); + die("unknown instruction"); } - while (i0 > curi && --i0) - if (rslot(i0->arg[0], fn) != -1 - || rslot(i0->arg[1], fn) != -1) - diag("isel: usupported address argument"); + while (i0 > curi && --i0) { + assert(rslot(i0->arg[0], fn) == -1); + assert(rslot(i0->arg[1], fn) == -1); + } } static Ins * @@ -733,7 +732,7 @@ selcall(Fn *fn, Ins *i0, Ins *i1, RAlloc **rap) } /* allocate return pad */ ra = alloc(sizeof *ra); - assert(NAlign == 3); + /* specific to NAlign == 3 */ aret.align -= 2; if (aret.align < 0) aret.align = 0; @@ -822,7 +821,7 @@ selpar(Fn *fn, Ins *i0, Ins *i1) } else classify(i0, i1, ac, OPar, 0); - assert(NAlign == 3); + /* specific to NAlign == 3 */ s = 4; for (i=i0, a=ac; i<i1; i++, a++) { @@ -856,7 +855,6 @@ selpar(Fn *fn, Ins *i0, Ins *i1) for (i=i0, a=ac; i<i1; i++, a++) { if (i->op != OParc || a->inmem) continue; - assert(NAlign == 3); for (al=0; a->align >> (al+2); al++) ; r = TMP(a->cls[0]); @@ -876,12 +874,12 @@ static int aref(Ref r, ANum *ai) { switch (rtype(r)) { - default: - diag("isel: aref defaulted"); case RCon: return 2; case RTmp: return ai[r.val].n; + default: + die("constant or temporary expected"); } } @@ -986,8 +984,6 @@ amatch(Addr *a, Ref r, ANum *ai, Fn *fn, int top) } } switch (ai[r.val].n) { - default: - diag("isel: amatch defaulted"); case 3: /* s * i */ if (!top) { a->index = al; @@ -1023,6 +1019,8 @@ amatch(Addr *a, Ref r, ANum *ai, Fn *fn, int top) amatch(a, ar, ai, fn, 0); amatch(a, al, ai, fn, 0); break; + default: + die("unreachable"); } } @@ -1092,15 +1090,15 @@ isel(Fn *fn) /* assign slots to fast allocs */ b = fn->start; - assert(NAlign == 3 && "change n=4 and sz /= 4 below"); + /* specific to NAlign == 3 */ /* or change n=4 and sz /= 4 below */ for (al=OAlloc, n=4; al<=OAlloc1; al++, n*=2) for (i=b->ins; i-b->ins < b->nins; i++) if (i->op == al) { if (rtype(i->arg[0]) != RCon) break; sz = fn->con[i->arg[0].val].bits.i; - if (sz < 0 || sz >= INT_MAX-3) - diag("isel: invalid alloc size"); + if (sz < 0 || sz >= INT_MAX-15) + err("invalid alloc size %"PRId64, sz); sz = (sz + n-1) & -n; sz /= 4; fn->tmp[i->to.val].slot = fn->slot; |