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| author | Jeffrey A Law <law@cygnus.com> | 1999-06-17 13:29:11 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1999-06-17 07:29:11 -0600 |
| commit | 51f0646f8a46b03d0fd01c79daf82a9ae5a2fceb (patch) | |
| tree | 399c423c555ce3ac267265c912e79063686f2837 /gcc/loop.c | |
| parent | 048f60dcb1e7663c2fcd5e1d5f0aaad621e786c4 (diff) | |
| download | gcc-51f0646f8a46b03d0fd01c79daf82a9ae5a2fceb.zip gcc-51f0646f8a46b03d0fd01c79daf82a9ae5a2fceb.tar.gz gcc-51f0646f8a46b03d0fd01c79daf82a9ae5a2fceb.tar.bz2 | |
loop.c (move_movables): Note issues with replacing REGs with SUBREGs.
�
* loop.c (move_movables): Note issues with replacing REGs with
SUBREGs.
* mips.h (GO_IF_LEGITIMATE_ADDRESS): Handle SUBREGs properly.
From-SVN: r27573
Diffstat (limited to 'gcc/loop.c')
| -rw-r--r-- | gcc/loop.c | 9 |
1 files changed, 8 insertions, 1 deletions
@@ -2170,7 +2170,14 @@ move_movables (movables, threshold, insn_count, loop_start, end, nregs) /* Schedule the reg loaded by M1 for replacement so that shares the reg of M. If the modes differ (only possible in restricted - circumstances, make a SUBREG. */ + circumstances, make a SUBREG. + + Note this assumes that the target dependent files + treat REG and SUBREG equally, including within + GO_IF_LEGITIMATE_ADDRESS and in all the + predicates since we never verify that replacing the + original register with a SUBREG results in a + recognizable insn. */ if (GET_MODE (m->set_dest) == GET_MODE (m1->set_dest)) reg_map[m1->regno] = m->set_dest; else |