diff options
Diffstat (limited to 'gcc-4.9/gcc/cprop.c')
| -rw-r--r-- | gcc-4.9/gcc/cprop.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/gcc-4.9/gcc/cprop.c b/gcc-4.9/gcc/cprop.c index c3acb05c1..6a3429e19 100644 --- a/gcc-4.9/gcc/cprop.c +++ b/gcc-4.9/gcc/cprop.c @@ -790,8 +790,11 @@ try_replace_reg (rtx from, rtx to, rtx insn) /* REG_EQUAL may get simplified into register. We don't allow that. Remove that note. This code ought not to happen, because previous code ought to synthesize - reg-reg move, but be on the safe side. */ - if (note && REG_NOTE_KIND (note) == REG_EQUAL && REG_P (XEXP (note, 0))) + reg-reg move, but be on the safe side. The REG_EQUAL note is + also removed when the source is a constant. */ + if (note && REG_NOTE_KIND (note) == REG_EQUAL + && (REG_P (XEXP (note, 0)) + || (set && CONSTANT_P (SET_SRC (set))))) remove_note (insn, note); return success; |