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| author | Eric Botcazou <ebotcazou@adacore.com> | 2019-09-11 10:41:27 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2019-09-11 10:41:27 +0000 |
| commit | 0a237a94c206b53eb73baad2d75fbcca518df65e (patch) | |
| tree | 8dfd7a8f5c6dc824fb59632ad688516eeb8cebff /gcc/rtlanal.c | |
| parent | 26d815a3e587ac04dbd63eec3fb5aecb04db7242 (diff) | |
re PR rtl-optimization/89795 (wrong code with -O2 -fno-dce -fno-forward-propagate -fno-sched-pressure)
PR rtl-optimization/89795
* rtlanal.c (nonzero_bits1) <SUBREG>: Do not propagate results from
inner REGs to paradoxical SUBREGs if WORD_REGISTER_OPERATIONS is set.
From-SVN: r275635
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index 1fbbeda88b2..3a72db7572d 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -4819,7 +4819,7 @@ nonzero_bits1 (const_rtx x, scalar_int_mode mode, const_rtx known_x, || ((extend_op = load_extend_op (inner_mode)) == SIGN_EXTEND ? val_signbit_known_set_p (inner_mode, nonzero) : extend_op != ZERO_EXTEND) - || (!MEM_P (SUBREG_REG (x)) && !REG_P (SUBREG_REG (x)))) + || !MEM_P (SUBREG_REG (x))) && xmode_width > inner_width) nonzero |= (GET_MODE_MASK (GET_MODE (x)) & ~GET_MODE_MASK (inner_mode)); |