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| author | Adam Nemet <anemet@caviumnetworks.com> | 2009-07-18 21:55:40 +0000 |
|---|---|---|
| committer | Adam Nemet <nemet@gcc.gnu.org> | 2009-07-18 21:55:40 +0000 |
| commit | 827f4079406b72fce7b49a29abe60ecb801462d5 (patch) | |
| tree | 31910105b61e164fdc184c5ff130eb63a48de118 /gcc/combine.c | |
| parent | f3ce108897e16f828b3350ac5c5be9d0ffc622c0 (diff) | |
| download | gcc-827f4079406b72fce7b49a29abe60ecb801462d5.zip gcc-827f4079406b72fce7b49a29abe60ecb801462d5.tar.gz gcc-827f4079406b72fce7b49a29abe60ecb801462d5.tar.bz2 | |
combine.c (make_compound_operation): If force_to_mode re-expanded the compound use gen_lowpart instead to convert to...
* combine.c (make_compound_operation) <SUBREG>: If force_to_mode
re-expanded the compound use gen_lowpart instead to convert to the
desired mode.
testsuite/
* gcc.target/mips/ext-2.c: New test.
From-SVN: r149781
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 39daf28..3f39bc3 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -7061,6 +7061,12 @@ make_compound_operation (rtx x, enum rtx_code in_code) if (GET_CODE (newer) != SUBREG) newer = make_compound_operation (newer, in_code); + /* force_to_mode can expand compounds. If it just re-expanded the + compound use gen_lowpart instead to convert to the desired + mode. */ + if (rtx_equal_p (newer, x)) + return gen_lowpart (GET_MODE (x), tem); + return newer; } |