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fix to prevent loop resulting in stack overflow

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This commit is contained in:
ceriel 1987-01-08 14:10:02 +00:00
parent bfb60b8a33
commit 01ac83b971
1 changed files with 7 additions and 6 deletions
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13
mach/proto/ncg/reg.c
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@ -71,6 +71,12 @@ getrefcount(regno) {
erasereg(regno) {
register struct reginfo *rp;
register int i;
rp = &machregs[regno];
rp->r_contents.t_token = 0;
for (i=0;i<TOKENSIZE;i++)
rp->r_contents.t_att[i].aw = 0;
#if MAXMEMBERS==0
awayreg(regno);
@ -86,11 +92,6 @@ awayreg(regno) {
register tkdef_p tdp;
register i;
rp = &machregs[regno];
rp->r_contents.t_token = 0;
for (i=0;i<TOKENSIZE;i++)
rp->r_contents.t_att[i].aw = 0;
/* Now erase recursively all registers containing
* something using this one
*/
@ -98,7 +99,7 @@ awayreg(regno) {
if (rp->r_contents.t_token == -1) {
if (rp->r_contents.t_att[0].ar == regno)
erasereg(rp-machregs);
} else {
} else if (rp->r_contents.t_token > 0) {
tdp= & tokens[rp->r_contents.t_token];
for (i=0;i<TOKENSIZE;i++)
if (tdp->t_type[i] == EV_REG &&