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| author | Tamar Christina <tamar.christina@arm.com> | 2018-07-05 10:35:00 +0000 |
|---|---|---|
| committer | Tamar Christina <tnfchris@gcc.gnu.org> | 2018-07-05 10:35:00 +0000 |
| commit | d6e5a37a0402177713e9496f0d852e2e1147437f (patch) | |
| tree | d85c7d84a110e0a71b36508ccbabd5555582e968 /gcc/rtlanal.c | |
| parent | 89c52e5e2ca6e63b1dc0868893d05434d61a0c33 (diff) | |
| download | gcc-d6e5a37a0402177713e9496f0d852e2e1147437f.zip gcc-d6e5a37a0402177713e9496f0d852e2e1147437f.tar.gz gcc-d6e5a37a0402177713e9496f0d852e2e1147437f.tar.bz2 | |
Correct subreg no-op handling for big-endian vec_select.
gcc/
PR target/84711
* rtlanal.c (set_noop_p): Constrain on mode change,
include hard-reg-set.h
gcc/testuite/
PR target/84711
* gcc.dg/vect/pr84711.c: New.
From-SVN: r262435
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index 8e8ee6e..9f84d7f 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -35,6 +35,7 @@ along with GCC; see the file COPYING3. If not see #include "recog.h" #include "addresses.h" #include "rtl-iter.h" +#include "hard-reg-set.h" /* Forward declarations */ static void set_of_1 (rtx, const_rtx, void *); @@ -1621,8 +1622,9 @@ set_noop_p (const_rtx set) if (maybe_ne (rtx_to_poly_int64 (XVECEXP (par, 0, i)), c0 + i)) return 0; return - simplify_subreg_regno (REGNO (src0), GET_MODE (src0), - offset, GET_MODE (dst)) == (int) REGNO (dst); + REG_CAN_CHANGE_MODE_P (REGNO (dst), GET_MODE (src0), GET_MODE (dst)) + && simplify_subreg_regno (REGNO (src0), GET_MODE (src0), + offset, GET_MODE (dst)) == (int) REGNO (dst); } return (REG_P (src) && REG_P (dst) |