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| author | Peter Bergner <bergner@vnet.ibm.com> | 2018-04-04 10:35:03 -0500 |
|---|---|---|
| committer | Peter Bergner <bergner@gcc.gnu.org> | 2018-04-04 10:35:03 -0500 |
| commit | 8c760464d0148aba6bc8a2f2ab7ecf6a8fd43127 (patch) | |
| tree | 1948331ba7d6c2a0461ffe475aeb7fe317c489b1 /gcc/ddg.c | |
| parent | f1acdcd066f3ba2a4565a9e8a002af897161483d (diff) | |
| download | gcc-8c760464d0148aba6bc8a2f2ab7ecf6a8fd43127.tar.gz | |
re PR rtl-optimization/84878 (ICE: Segmentation fault (in add_cross_iteration_register_deps))
gcc/
PR rtl-optimization/84878
* ddg.c (add_cross_iteration_register_deps): Use DF_REF_BB to determine
the basic block. Assert the use reference is not artificial and that
it has an associated insn.
gcc/testsuite/
PR rtl-optimization/84878
* gcc.target/powerpc/pr84878.c: New test.
From-SVN: r259085
Diffstat (limited to 'gcc/ddg.c')
| -rw-r--r-- | gcc/ddg.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gcc/ddg.c b/gcc/ddg.c index cffed2b3671..d51456618d6 100644 --- a/gcc/ddg.c +++ b/gcc/ddg.c @@ -295,11 +295,14 @@ add_cross_iteration_register_deps (ddg_ptr g, df_ref last_def) /* Create inter-loop true dependences and anti dependences. */ for (r_use = DF_REF_CHAIN (last_def); r_use != NULL; r_use = r_use->next) { - rtx_insn *use_insn = DF_REF_INSN (r_use->ref); - - if (BLOCK_FOR_INSN (use_insn) != g->bb) + if (DF_REF_BB (r_use->ref) != g->bb) continue; + gcc_assert (!DF_REF_IS_ARTIFICIAL (r_use->ref) + && DF_REF_INSN_INFO (r_use->ref) != NULL); + + rtx_insn *use_insn = DF_REF_INSN (r_use->ref); + /* ??? Do not handle uses with DF_REF_IN_NOTE notes. */ use_node = get_node_of_insn (g, use_insn); gcc_assert (use_node); |