OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

(invariant_p, case REG): Pointers into frame are not invariants if 

function has nonlocal gotos.

From-SVN: r13862
This commit is contained in:
Richard Kenner 1997-04-13 08:15:13 -04:00
parent 51a96571d6
commit 1f027d54a1
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
gcc/loop.c
View File

@ -2761,14 +2761,19 @@ invariant_p (x)
case REG:
/* We used to check RTX_UNCHANGING_P (x) here, but that is invalid
since the reg might be set by initialization within the loop. */
if (x == frame_pointer_rtx || x == hard_frame_pointer_rtx
|| x == arg_pointer_rtx)
if ((x == frame_pointer_rtx || x == hard_frame_pointer_rtx
|| x == arg_pointer_rtx)
&& ! current_function_has_nonlocal_goto)
return 1;
if (loop_has_call
&& REGNO (x) < FIRST_PSEUDO_REGISTER && call_used_regs[REGNO (x)])
return 0;
if (n_times_set[REGNO (x)] < 0)
return 2;
return n_times_set[REGNO (x)] == 0;
case MEM: