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| author | Richard Kenner <kenner@gcc.gnu.org> | 1995-04-10 07:57:09 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1995-04-10 07:57:09 -0400 |
| commit | f507a0704432f434b19063ced39f4e5cba986a5d (patch) | |
| tree | 7fa1aa5640950a8f93331db8dadb8b4011eebe35 /gcc | |
| parent | 0639444ffba6b0defc610d2f8c1c19d61269ba07 (diff) | |
| download | gcc-f507a0704432f434b19063ced39f4e5cba986a5d.zip gcc-f507a0704432f434b19063ced39f4e5cba986a5d.tar.gz gcc-f507a0704432f434b19063ced39f4e5cba986a5d.tar.bz2 | |
(simplify_set): Don't move a SUBREG to dest if it is changing the size
of a hard reg in CLASS_CANNOT_CHANGE_SIZE.
From-SVN: r9346
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/combine.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 48e5a87..2bb00d4 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -4334,6 +4334,14 @@ simplify_set (x) && (GET_MODE_SIZE (GET_MODE (src)) < GET_MODE_SIZE (GET_MODE (SUBREG_REG (src)))) #endif +#ifdef CLASS_CANNOT_CHANGE_SIZE + && ! (GET_CODE (dest) == REG && REGNO (dest) < FIRST_PSEUDO_REGISTER + && (TEST_HARD_REG_BIT + (reg_class_contents[(int) CLASS_CANNOT_CHANGE_SIZE], + REGNO (dest))) + && (GET_MODE_SIZE (GET_MODE (src)) + != GET_MODE_SIZE (GET_MODE (SUBREG_REG (src))))) +#endif && (GET_CODE (dest) == REG || (GET_CODE (dest) == SUBREG && GET_CODE (SUBREG_REG (dest)) == REG))) |