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| author | Richard Sandiford <rdsandiford@googlemail.com> | 2011-12-19 21:19:13 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2011-12-19 21:19:13 +0000 |
| commit | 488c8379f425d9cfefa65eb2e393ca71f1cf65c0 (patch) | |
| tree | 37253ea4aff9510b8b59986473fe750663d476f2 | |
| parent | 176fcc5d1822df70613dd74a19d28c2e0840193a (diff) | |
| download | gcc-488c8379f425d9cfefa65eb2e393ca71f1cf65c0.zip gcc-488c8379f425d9cfefa65eb2e393ca71f1cf65c0.tar.gz gcc-488c8379f425d9cfefa65eb2e393ca71f1cf65c0.tar.bz2 | |
lower-subreg.c (can_decompose_p): Check every word of a hard register.
gcc/
* lower-subreg.c (can_decompose_p): Check every word of a hard
register.
From-SVN: r182500
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/lower-subreg.c | 11 |
2 files changed, 14 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 02c8dce..3750993 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2011-12-19 Richard Sandiford <rdsandiford@googlemail.com> + + * lower-subreg.c (can_decompose_p): Check every word of a hard + register. + 2011-12-19 Sandra Loosemore <sandra@codesourcery.com> Tom de Vries <tom@codesourcery.com> diff --git a/gcc/lower-subreg.c b/gcc/lower-subreg.c index 85aa298..779cc5f 100644 --- a/gcc/lower-subreg.c +++ b/gcc/lower-subreg.c @@ -634,8 +634,15 @@ can_decompose_p (rtx x) unsigned int regno = REGNO (x); if (HARD_REGISTER_NUM_P (regno)) - return (validate_subreg (word_mode, GET_MODE (x), x, UNITS_PER_WORD) - && HARD_REGNO_MODE_OK (regno, word_mode)); + { + unsigned int byte, num_bytes; + + num_bytes = GET_MODE_SIZE (GET_MODE (x)); + for (byte = 0; byte < num_bytes; byte += UNITS_PER_WORD) + if (simplify_subreg_regno (regno, GET_MODE (x), byte, word_mode) < 0) + return false; + return true; + } else return !bitmap_bit_p (subreg_context, regno); } |