diff options
| -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 02c8dce7e3e..37509933734 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 85aa29891bf..779cc5f40de 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); } |