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| author | Alexander Monakov <amonakov@ispras.ru> | 2011-10-18 16:36:16 +0400 |
|---|---|---|
| committer | Alexander Monakov <amonakov@gcc.gnu.org> | 2011-10-18 16:36:16 +0400 |
| commit | ea3f6aa86222070d219f0c70a60c2eda779ba306 (patch) | |
| tree | d81160bdc6decd0db9c1c8ba11fe91db4af9dcda /gcc/sel-sched.c | |
| parent | 748c5114543cb803cdb494105510217046d20513 (diff) | |
| download | gcc-ea3f6aa86222070d219f0c70a60c2eda779ba306.zip gcc-ea3f6aa86222070d219f0c70a60c2eda779ba306.tar.gz gcc-ea3f6aa86222070d219f0c70a60c2eda779ba306.tar.bz2 | |
re PR rtl-optimization/50205 (ICE: in code_motion_path_driver, at sel-sched.c:6581 with -fselective-scheduling2 and custom flags)
PR rtl-optimization/50205
* sel-sched.c (count_occurrences_1): Simplify on the assumption that
p->x is a register. Forbid substitution when the same register is
found in a different mode.
(count_occurrences_equiv): Assert that 'what' is a register.
* gcc.dg/pr50205.c: New.
From-SVN: r180135
Diffstat (limited to 'gcc/sel-sched.c')
| -rw-r--r-- | gcc/sel-sched.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/gcc/sel-sched.c b/gcc/sel-sched.c index f11faca..2af01ae 100644 --- a/gcc/sel-sched.c +++ b/gcc/sel-sched.c @@ -813,18 +813,12 @@ count_occurrences_1 (rtx *cur_rtx, void *arg) { rtx_search_arg_p p = (rtx_search_arg_p) arg; - /* The last param FOR_GCSE is true, because otherwise it performs excessive - substitutions like - r8 = r33 - r16 = r33 - for the last insn it presumes r33 equivalent to r8, so it changes it to - r33. Actually, there's no change, but it spoils debugging. */ - if (exp_equiv_p (*cur_rtx, p->x, 0, true)) - { - /* Bail out if we occupy more than one register. */ - if (REG_P (*cur_rtx) - && HARD_REGISTER_P (*cur_rtx) - && hard_regno_nregs[REGNO(*cur_rtx)][GET_MODE (*cur_rtx)] > 1) + if (REG_P (*cur_rtx) && REGNO (*cur_rtx) == REGNO (p->x)) + { + /* Bail out if mode is different or more than one register is used. */ + if (GET_MODE (*cur_rtx) != GET_MODE (p->x) + || (HARD_REGISTER_P (*cur_rtx) + && hard_regno_nregs[REGNO(*cur_rtx)][GET_MODE (*cur_rtx)] > 1)) { p->n = 0; return 1; @@ -837,7 +831,6 @@ count_occurrences_1 (rtx *cur_rtx, void *arg) } if (GET_CODE (*cur_rtx) == SUBREG - && REG_P (p->x) && (!REG_P (SUBREG_REG (*cur_rtx)) || REGNO (SUBREG_REG (*cur_rtx)) == REGNO (p->x))) { @@ -859,6 +852,7 @@ count_occurrences_equiv (rtx what, rtx where) { struct rtx_search_arg arg; + gcc_assert (REG_P (what)); arg.x = what; arg.n = 0; |