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| author | Jakub Jelinek <jakub@redhat.com> | 2019-01-17 09:04:28 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2019-01-17 09:04:28 +0100 |
| commit | 9556b012b73024a95e72d8aa1b434ad50b8df9d3 (patch) | |
| tree | be2f15ccfc2d0ffd4a9a22d8734835dc1686e9b2 /gcc/dce.c | |
| parent | 404fa41fcfba5b0f969e6845f0447a295c73984e (diff) | |
| download | gcc-9556b012b73024a95e72d8aa1b434ad50b8df9d3.zip gcc-9556b012b73024a95e72d8aa1b434ad50b8df9d3.tar.gz gcc-9556b012b73024a95e72d8aa1b434ad50b8df9d3.tar.bz2 | |
re PR rtl-optimization/88870 (ICE: Segmentation fault (in df_worklist_propagate_backward))
PR rtl-optimization/88870
* dce.c (deletable_insn_p): Never delete const/pure calls that can
throw if we can't alter the cfg or delete dead exceptions.
(mark_insn): Don't call find_call_stack_args for such calls.
* gcc.dg/pr88870.c: New test.
From-SVN: r268008
Diffstat (limited to 'gcc/dce.c')
| -rw-r--r-- | gcc/dce.c | 9 |
1 files changed, 7 insertions, 2 deletions
@@ -108,7 +108,10 @@ deletable_insn_p (rtx_insn *insn, bool fast, bitmap arg_stores) /* We can delete dead const or pure calls as long as they do not infinite loop. */ && (RTL_CONST_OR_PURE_CALL_P (insn) - && !RTL_LOOPING_CONST_OR_PURE_CALL_P (insn))) + && !RTL_LOOPING_CONST_OR_PURE_CALL_P (insn)) + /* Don't delete calls that may throw if we cannot do so. */ + && ((cfun->can_delete_dead_exceptions && can_alter_cfg) + || insn_nothrow_p (insn))) return find_call_stack_args (as_a <rtx_call_insn *> (insn), false, fast, arg_stores); @@ -201,7 +204,9 @@ mark_insn (rtx_insn *insn, bool fast) && !df_in_progress && !SIBLING_CALL_P (insn) && (RTL_CONST_OR_PURE_CALL_P (insn) - && !RTL_LOOPING_CONST_OR_PURE_CALL_P (insn))) + && !RTL_LOOPING_CONST_OR_PURE_CALL_P (insn)) + && ((cfun->can_delete_dead_exceptions && can_alter_cfg) + || insn_nothrow_p (insn))) find_call_stack_args (as_a <rtx_call_insn *> (insn), true, fast, NULL); } } |