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| author | Jakub Jelinek <jakub@gcc.gnu.org> | 2013-03-05 23:25:43 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2013-03-05 23:25:43 +0100 |
| commit | 7ead14d420b671bbc3e3eff8976fa80b09a7766b (patch) | |
| tree | 0859b99a62412f9160eef192b41558a061831d2d /gcc/ifcvt.c | |
| parent | ee61ea3844e8deee83cee22e037b15339f823171 (diff) | |
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re PR rtl-optimization/56484 (ICE in assign_by_spills, at lra-assigns.c:1268)
PR rtl-optimization/56484
* ifcvt.c (noce_process_if_block): If else_bb is NULL, avoid extending
lifetimes of hard registers on small register class machines.
From-SVN: r196478
Diffstat (limited to 'gcc/ifcvt.c')
| -rw-r--r-- | gcc/ifcvt.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c index dd94100..f081ecd 100644 --- a/gcc/ifcvt.c +++ b/gcc/ifcvt.c @@ -2491,6 +2491,12 @@ noce_process_if_block (struct noce_if_info *if_info) || ! noce_operand_ok (SET_SRC (set_b)) || reg_overlap_mentioned_p (x, SET_SRC (set_b)) || modified_between_p (SET_SRC (set_b), insn_b, jump) + /* Avoid extending the lifetime of hard registers on small + register class machines. */ + || (REG_P (SET_SRC (set_b)) + && HARD_REGISTER_P (SET_SRC (set_b)) + && targetm.small_register_classes_for_mode_p + (GET_MODE (SET_SRC (set_b)))) /* Likewise with X. In particular this can happen when noce_get_condition looks farther back in the instruction stream than one might expect. */ |