diff options
Diffstat (limited to 'gcc/reload.c')
| -rw-r--r-- | gcc/reload.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index 27d5787..3ad46b9 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -6791,6 +6791,15 @@ find_equiv_reg (rtx goal, rtx insn, enum reg_class rclass, int other, || num > PARAM_VALUE (PARAM_MAX_RELOAD_SEARCH_INSNS)) return 0; + /* Don't reuse register contents from before a setjmp-type + function call; on the second return (from the longjmp) it + might have been clobbered by a later reuse. It doesn't + seem worthwhile to actually go and see if it is actually + reused even if that information would be readily available; + just don't reuse it across the setjmp call. */ + if (CALL_P (p) && find_reg_note (p, REG_SETJMP, NULL_RTX)) + return 0; + if (NONJUMP_INSN_P (p) /* If we don't want spill regs ... */ && (! (reload_reg_p != 0 |