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| author | Aldy Hernandez <aldyh@redhat.com> | 2021-11-29 12:52:45 +0100 |
|---|---|---|
| committer | Aldy Hernandez <aldyh@redhat.com> | 2021-11-30 11:23:27 +0100 |
| commit | f33fdda0b805ff6097f9f325d73a4b07e72170b0 (patch) | |
| tree | fe4239e3bff55be8b3a1e7e283c872e9a87ce6ce /gcc | |
| parent | 8af3f53d325fe4a6b1f3da64dc02d10978b9a116 (diff) | |
| download | gcc-f33fdda0b805ff6097f9f325d73a4b07e72170b0.zip gcc-f33fdda0b805ff6097f9f325d73a4b07e72170b0.tar.gz gcc-f33fdda0b805ff6097f9f325d73a4b07e72170b0.tar.bz2 | |
Remove can_throw_non_call_exceptions special case from operator_div::wi_fold.
PR tree-optimization/103451
gcc/ChangeLog:
* range-op.cc (operator_div::wi_fold): Remove
can_throw_non_call_exceptions special case.
* tree-ssa-sink.c (sink_code_in_bb): Same.
gcc/testsuite/ChangeLog:
* gcc.dg/pr103451.c: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/range-op.cc | 7 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr103451.c | 19 | ||||
| -rw-r--r-- | gcc/tree-ssa-sink.c | 4 |
3 files changed, 22 insertions, 8 deletions
diff --git a/gcc/range-op.cc b/gcc/range-op.cc index bbf2924..6fe5f1c 100644 --- a/gcc/range-op.cc +++ b/gcc/range-op.cc @@ -1832,13 +1832,6 @@ operator_div::wi_fold (irange &r, tree type, return; } - // If flag_non_call_exceptions, we must not eliminate a division by zero. - if (cfun->can_throw_non_call_exceptions) - { - r.set_varying (type); - return; - } - // If we're definitely dividing by zero, there's nothing to do. if (wi_zero_p (type, divisor_min, divisor_max)) { diff --git a/gcc/testsuite/gcc.dg/pr103451.c b/gcc/testsuite/gcc.dg/pr103451.c new file mode 100644 index 0000000..c701934 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr103451.c @@ -0,0 +1,19 @@ +// { dg-do compile } +// { dg-options "-O2 -w -fnon-call-exceptions -fno-delete-dead-exceptions -fdump-tree-optimized" } + +int func_10_ptr_12; + +void func_10(long li_8) +{ + long *ptr_9 = &li_8; + li_8 &= *ptr_9 / 0 ?: li_8; + for (;;) + func_10_ptr_12 &= 4 ? *ptr_9 : 4; +} + +void func_9_s_8() +{ + func_10(func_9_s_8); +} + +// { dg-final { scan-tree-dump " / 0" "optimized" } } diff --git a/gcc/tree-ssa-sink.c b/gcc/tree-ssa-sink.c index 92f444e..c5d6784 100644 --- a/gcc/tree-ssa-sink.c +++ b/gcc/tree-ssa-sink.c @@ -696,7 +696,9 @@ sink_code_in_bb (basic_block bb) /* If we face a dead stmt remove it as it possibly blocks sinking of uses. */ if (zero_uses_p - && ! gimple_vdef (stmt)) + && !gimple_vdef (stmt) + && (cfun->can_delete_dead_exceptions + || !stmt_could_throw_p (cfun, stmt))) { gsi_remove (&saved, true); release_defs (stmt); |