diff options
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index 3ffd063..98a2843 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -1075,8 +1075,7 @@ set_noop_p (rtx set) if (MEM_P (dst) && MEM_P (src)) return rtx_equal_p (dst, src) && !side_effects_p (dst); - if (GET_CODE (dst) == SIGN_EXTRACT - || GET_CODE (dst) == ZERO_EXTRACT) + if (GET_CODE (dst) == ZERO_EXTRACT) return rtx_equal_p (XEXP (dst, 0), src) && ! BYTES_BIG_ENDIAN && XEXP (dst, 2) == const0_rtx && !side_effects_p (src); @@ -1405,7 +1404,6 @@ note_stores (rtx x, void (*fun) (rtx, rtx, void *), void *data) && (!REG_P (SUBREG_REG (dest)) || REGNO (SUBREG_REG (dest)) >= FIRST_PSEUDO_REGISTER)) || GET_CODE (dest) == ZERO_EXTRACT - || GET_CODE (dest) == SIGN_EXTRACT || GET_CODE (dest) == STRICT_LOW_PART) dest = XEXP (dest, 0); @@ -1514,8 +1512,8 @@ note_uses (rtx *pbody, void (*fun) (rtx *, void *), void *data) This will be true if X is (cc0) or if X is a register and X dies in INSN or because INSN entirely sets X. - "Entirely set" means set directly and not through a SUBREG, - ZERO_EXTRACT or SIGN_EXTRACT, so no trace of the old contents remains. + "Entirely set" means set directly and not through a SUBREG, or + ZERO_EXTRACT, so no trace of the old contents remains. Likewise, REG_INC does not count. REG may be a hard or pseudo reg. Renumbering is not taken into account, |