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| author | Alan Modra <amodra@gmail.com> | 2016-05-04 09:41:32 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gcc.gnu.org> | 2016-05-04 09:41:32 +0930 |
| commit | 343d0287f2e4f0360e2c0310b48f94d695ed0e4c (patch) | |
| tree | 9fa15ef0c727e87fda693b64ffd578e0e16ffdff | |
| parent | 475839b6db90ccdb27c0cc56400185cd04e783c3 (diff) | |
| download | gcc-343d0287f2e4f0360e2c0310b48f94d695ed0e4c.zip gcc-343d0287f2e4f0360e2c0310b48f94d695ed0e4c.tar.gz gcc-343d0287f2e4f0360e2c0310b48f94d695ed0e4c.tar.bz2 | |
Combine simplify_set WORD_REGISTER_OPERATIONS
The comment says this test is supposed to prevent "a narrower
operation than requested", but it actually only allows a larger
subreg not one the same size. Fix that.
* combine.c (simplify_set): Correct WORD_REGISTER_OPERATIONS test.
From-SVN: r235852
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/combine.c | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 79fb0f48..77d81cc 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,9 @@ 2016-05-04 Alan Modra <amodra@gmail.com> + * combine.c (simplify_set): Correct WORD_REGISTER_OPERATIONS test. + +2016-05-04 Alan Modra <amodra@gmail.com> + PR target/70866 * config/rs6000/rs6000.c (rs6000_stack_info): Don't set cr_save_p when cr2,3,4 are all fixed regs. diff --git a/gcc/combine.c b/gcc/combine.c index 0ab3f97..3554f51 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6736,7 +6736,7 @@ simplify_set (rtx x) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)) && (WORD_REGISTER_OPERATIONS || (GET_MODE_SIZE (GET_MODE (src)) - < GET_MODE_SIZE (GET_MODE (SUBREG_REG (src))))) + <= GET_MODE_SIZE (GET_MODE (SUBREG_REG (src))))) #ifdef CANNOT_CHANGE_MODE_CLASS && ! (REG_P (dest) && REGNO (dest) < FIRST_PSEUDO_REGISTER && REG_CANNOT_CHANGE_MODE_P (REGNO (dest), |