diff options
| author | Alexander Monakov <amonakov@ispras.ru> | 2011-10-19 12:46:44 +0000 |
|---|---|---|
| committer | Alexander Monakov <amonakov@ispras.ru> | 2011-10-19 12:46:44 +0000 |
| commit | 6f9069c658528e76cb2f740b4b2b1201e7ead9e3 (patch) | |
| tree | 431a3f95c56d18fcbb0c246f32e76182005871da /gcc/sel-sched-ir.c | |
| parent | 036e54d3a7ad2860f76b31042366d6b06125c4e4 (diff) | |
2011-10-19 Andrey Belevantsev <abel@ispras.ru>
PR rtl-optimization/50340
* sel-sched-ir.c (update_target_availability): LHS register
availability is not known if the unavailable LHS of the other
expression is a different register.
* gcc.dg/pr50340.c: New.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@180186 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/sel-sched-ir.c')
| -rw-r--r-- | gcc/sel-sched-ir.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/sel-sched-ir.c b/gcc/sel-sched-ir.c index 4878460f882..dacee0b9e9b 100644 --- a/gcc/sel-sched-ir.c +++ b/gcc/sel-sched-ir.c @@ -1745,6 +1745,11 @@ update_target_availability (expr_t to, expr_t from, insn_t split_point) else EXPR_TARGET_AVAILABLE (to) = -1; } + else if (EXPR_TARGET_AVAILABLE (from) == 0 + && EXPR_LHS (from) + && REG_P (EXPR_LHS (from)) + && REGNO (EXPR_LHS (to)) != REGNO (EXPR_LHS (from))) + EXPR_TARGET_AVAILABLE (to) = -1; else EXPR_TARGET_AVAILABLE (to) &= EXPR_TARGET_AVAILABLE (from); } |