diff options
Diffstat (limited to 'gcc/sched.c')
| -rw-r--r-- | gcc/sched.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/sched.c b/gcc/sched.c index 9870967..549148b 100644 --- a/gcc/sched.c +++ b/gcc/sched.c @@ -2825,6 +2825,16 @@ attach_deaths (x, insn, set_p) { if (! all_needed && ! dead_or_set_p (insn, x)) { + /* Check for the case where the register dying partially + overlaps the register set by this insn. */ + if (regno < FIRST_PSEUDO_REGISTER + && HARD_REGNO_NREGS (regno, GET_MODE (x)) > 1) + { + int n = HARD_REGNO_NREGS (regno, GET_CODE (x)); + while (--n >= 0) + some_needed |= dead_or_set_regno_p (insn, regno + n); + } + /* If none of the words in X is needed, make a REG_DEAD note. Otherwise, we must make partial REG_DEAD notes. */ |