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5c: handle unused results for cgen64()

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This commit is contained in:
cinap_lenrek 2016-06-26 16:38:46 +02:00
parent 67a9174ff8
commit b2efac4687
1 changed files with 20 additions and 0 deletions
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20
sys/src/cmd/5c/cgen.c
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@ -923,6 +923,10 @@ cgen64(Node *n, Node *nn)
return 0; return 0;
case OCAST: case OCAST:
if(nn == Z){
nullwarn(l, Z);
goto Out;
}
if(typeilp[n->type->etype] && typev[l->type->etype]){ if(typeilp[n->type->etype] && typev[l->type->etype]){
if(l->op == ONAME || l->op == OINDREG) if(l->op == ONAME || l->op == OINDREG)
nod0 = *l; nod0 = *l;
@ -1004,6 +1008,10 @@ cgen64(Node *n, Node *nn)
goto Out; goto Out;
case OASHL: case OASHL:
if(nn == Z){
nullwarn(l, Z);
goto Out;
}
cgen(l, nn); cgen(l, nn);
assert(r->op == OCONST); assert(r->op == OCONST);
a = r->vconst & 63; a = r->vconst & 63;
@ -1033,6 +1041,10 @@ cgen64(Node *n, Node *nn)
case OLSHR: case OLSHR:
case OASHR: case OASHR:
if(nn == Z){
nullwarn(l, Z);
goto Out;
}
cgen(l, nn); cgen(l, nn);
assert(r->op == OCONST); assert(r->op == OCONST);
a = r->vconst & 63; a = r->vconst & 63;
@ -1062,6 +1074,10 @@ cgen64(Node *n, Node *nn)
case OAND: case OAND:
case OXOR: case OXOR:
case OOR: case OOR:
if(nn == Z){
nullwarn(l, r);
goto Out;
}
ml = o == OADD && l->op == OLMUL && machcap(l); ml = o == OADD && l->op == OLMUL && machcap(l);
mr = o == OADD && r->op == OLMUL && machcap(r); mr = o == OADD && r->op == OLMUL && machcap(r);
if(ml && !mr){ if(ml && !mr){
@ -1133,6 +1149,10 @@ cgen64(Node *n, Node *nn)
break; break;
} }
if(nn == Z){
nullwarn(l, r);
goto Out;
}
if(r->complex > l->complex) { if(r->complex > l->complex) {
l = r; l = r;
r = n->left; r = n->left;