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| author | Mostafa Hagog <mustafa@il.ibm.com> | 2004-03-18 20:09:04 +0000 |
|---|---|---|
| committer | David Edelsohn <dje@gcc.gnu.org> | 2004-03-18 15:09:04 -0500 |
| commit | 2171cb855efea2f8c6b71a5ed57bf97dd358b6c2 (patch) | |
| tree | cd1cbc7d49c1a314f833bc45f4ecdaf346a9c0c3 /gcc/gcse.c | |
| parent | 61b28f56bb32aae63c1fba006918b6c60c243c9c (diff) | |
| download | gcc-2171cb855efea2f8c6b71a5ed57bf97dd358b6c2.zip gcc-2171cb855efea2f8c6b71a5ed57bf97dd358b6c2.tar.gz gcc-2171cb855efea2f8c6b71a5ed57bf97dd358b6c2.tar.bz2 | |
gcse.c (eliminate_partially_redundant_loads): Reject change if dest is set between beginning and current insn.
2004-03-18 Mostafa Hagog <mustafa@il.ibm.com>
* gcse.c (eliminate_partially_redundant_loads): Reject change if
dest is set between beginning and current insn.
From-SVN: r79636
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 8 |
1 files changed, 5 insertions, 3 deletions
@@ -8319,10 +8319,12 @@ eliminate_partially_redundant_loads (basic_block bb, rtx insn, pat = PATTERN (insn); dest = SET_DEST (pat); - /* Check if the loaded register is not used nor killed from the beginning - of the block. */ + /* Check that the loaded register is not used, set, or killed from the + beginning of the block. */ if (reg_used_between_after_reload_p (dest, - PREV_INSN (BB_HEAD (bb)), insn)) + PREV_INSN (BB_HEAD (bb)), insn) + || reg_set_between_after_reload_p (dest, + PREV_INSN (BB_HEAD (bb)), insn)) return; /* Check potential for replacing load with copy for predecessors. */ |