https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79780
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- cprop.c.jj2 2017-02-13 22:55:30.000000000 +0100
+++ cprop.c 2017-03-01 17:36:36.123518656 +0100
@@ -1829,7 +1829,6 @@ one_cprop_pass (void)
EXIT_BLOCK_PTR_FOR_FN (cfun),
next_bb)
{
- bool seen_uncond_trap = false;
rtx_insn *insn;
/* Reset tables used to keep track of what's still valid [since
@@ -1852,13 +1851,10 @@ one_cprop_pass (void)
if (! NOTE_P (insn) && ! insn->deleted ())
mark_oprs_set (insn);
- if (!was_uncond_trap && !seen_uncond_trap
+ if (!was_uncond_trap
&& GET_CODE (PATTERN (insn)) == TRAP_IF
&& XEXP (PATTERN (insn), 0) == const1_rtx)
- {
- seen_uncond_trap = true;
- uncond_traps.safe_push (insn);
- }
+ uncond_traps.safe_push (insn);
}
}
fixes the ICE for me. I bet the reason for the seen_uncond_trap is that
further splitting of dead code doesn't buy us much. So another alternative
would be to simply delete the second and further unconditional trap instead of
splitting it.
