diff options
| author | vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-12-01 19:31:41 +0000 |
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| committer | vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-12-01 19:31:41 +0000 |
| commit | e8cee0a2ea8196e1b93166fe6bd35f3dcb99e46a (patch) | |
| tree | 242b75896f5d3ea2d35431520de4971ef7d0b2c4 /gcc/reload1.c | |
| parent | 853845ad4347f646afb7c3bbd2d06255b0095de1 (diff) | |
| download | gcc-e8cee0a2ea8196e1b93166fe6bd35f3dcb99e46a.tar.gz | |
2008-12-01 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/37514
* reload1.c (reload_as_needed): Invalidate reg_last_reload
from previous insns.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@142328 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index e9ac1486915..2f95fa55aa2 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -4164,6 +4164,9 @@ reload_as_needed (int live_known) rtx prev = 0; rtx insn = chain->insn; rtx old_next = NEXT_INSN (insn); +#ifdef AUTO_INC_DEC + rtx old_prev = PREV_INSN (insn); +#endif /* If we pass a label, copy the offsets from the label information into the current offsets of each elimination. */ @@ -4388,6 +4391,33 @@ reload_as_needed (int live_known) SET_REGNO_REG_SET (®_has_output_reload, REGNO (XEXP (in_reg, 0))); } + else if ((code == PRE_INC || code == PRE_DEC + || code == POST_INC || code == POST_DEC)) + { + int in_hard_regno; + int in_regno = REGNO (XEXP (in_reg, 0)); + + if (reg_last_reload_reg[in_regno] != NULL_RTX) + { + in_hard_regno = REGNO (reg_last_reload_reg[in_regno]); + gcc_assert (TEST_HARD_REG_BIT (reg_reloaded_valid, + in_hard_regno)); + for (x = old_prev ? NEXT_INSN (old_prev) : insn; + x != old_next; + x = NEXT_INSN (x)) + if (x == reg_reloaded_insn[in_hard_regno]) + break; + /* If for some reasons, we didn't set up + reg_last_reload_reg in this insn, + invalidate inheritance from previous + insns for the incremented/decremented + register. Such registers will be not in + reg_has_output_reload. */ + if (x == old_next) + forget_old_reloads_1 (XEXP (in_reg, 0), + NULL_RTX, NULL); + } + } } } /* If a pseudo that got a hard register is auto-incremented, |