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| author | Jan Hubicka <jh@suse.cz> | 2001-06-12 17:25:16 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2001-06-12 15:25:16 +0000 |
| commit | 04864a4677563e47ce9adf9467f91ad42b41c0a0 (patch) | |
| tree | c7e337bb6237fdae9b67cab57c4825e6ad43ae26 /gcc/simplify-rtx.c | |
| parent | 2c1a24210c495aa26a6e2cf90bd2260b2ba18afe (diff) | |
| download | gcc-04864a4677563e47ce9adf9467f91ad42b41c0a0.zip gcc-04864a4677563e47ce9adf9467f91ad42b41c0a0.tar.gz gcc-04864a4677563e47ce9adf9467f91ad42b41c0a0.tar.bz2 | |
simplify-rtx.c (simplify_subreg): Allow volatile memory to be subregged in case we don't have move instruction.
* simplify-rtx.c (simplify_subreg): Allow volatile memory
to be subregged in case we don't have move instruction.
From-SVN: r43261
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 3450f7b1..b2123c1 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -2409,7 +2409,11 @@ simplify_subreg (outermode, op, innermode, byte) if (GET_CODE (op) == MEM && ! mode_dependent_address_p (XEXP (op, 0)) - && ! MEM_VOLATILE_P (op) + /* Allow splitting of volatile memory references in case we don't + have instruction to move the whole thing. */ + && (! MEM_VOLATILE_P (op) + || (mov_optab->handlers[(int) innermode].insn_code + == CODE_FOR_nothing)) && GET_MODE_SIZE (outermode) <= GET_MODE_SIZE (GET_MODE (op))) { rtx new; |