diff options
| author | bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-03-19 15:01:45 +0000 |
|---|---|---|
| committer | bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-03-19 15:01:45 +0000 |
| commit | 6b5f73b1f8eff5512e898d086b47983c10eaa4b0 (patch) | |
| tree | c62efb2d340e59138526b2a6831e432d2357fb61 /gcc/combine.c | |
| parent | 364ab5fb2ff08ec43be0a9992f298aa17e24fd29 (diff) | |
| download | gcc-6b5f73b1f8eff5512e898d086b47983c10eaa4b0.tar.gz | |
* combine.c (try_combine): When changing the mode of a hard reg, make
sure that doing so is valid.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@96730 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index d6ec6ac69c3..87a2f8dc1cf 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2373,11 +2373,17 @@ try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p) && REG_P (i2dest) #endif /* We need I2DEST in the proper mode. If it is a hard register - or the only use of a pseudo, we can change its mode. */ + or the only use of a pseudo, we can change its mode. + Make sure we don't change a hard register to have a mode that + isn't valid for it, or change the number of registers. */ && (GET_MODE (*split) == GET_MODE (i2dest) || GET_MODE (*split) == VOIDmode - || REGNO (i2dest) < FIRST_PSEUDO_REGISTER - || (REG_N_SETS (REGNO (i2dest)) == 1 && ! added_sets_2 + || (REGNO (i2dest) < FIRST_PSEUDO_REGISTER + && HARD_REGNO_MODE_OK (REGNO (i2dest), GET_MODE (*split)) + && (HARD_REGNO_NREGS (REGNO (i2dest), GET_MODE (i2dest)) + == HARD_REGNO_NREGS (REGNO (i2dest), GET_MODE (*split)))) + || (REGNO (i2dest) >= FIRST_PSEUDO_REGISTER + && REG_N_SETS (REGNO (i2dest)) == 1 && ! added_sets_2 && ! REG_USERVAR_P (i2dest))) && (next_real_insn (i2) == i3 || ! use_crosses_set_p (*split, INSN_CUID (i2))) |