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| author | Bin Cheng <bin.cheng@arm.com> | 2016-11-30 14:41:09 +0000 |
|---|---|---|
| committer | Bin Cheng <amker@gcc.gnu.org> | 2016-11-30 14:41:09 +0000 |
| commit | aec0ee116cb445f5d7bbbaff3d39f60a8f7cb118 (patch) | |
| tree | 5ccf9c104099340d6ccd504008b97d48de9e3595 /gcc/tree-ssa-loop-ivopts.c | |
| parent | 44cd68d2b7adf87223f6e580f575c69bb6c19fa0 (diff) | |
| download | gcc-aec0ee116cb445f5d7bbbaff3d39f60a8f7cb118.zip gcc-aec0ee116cb445f5d7bbbaff3d39f60a8f7cb118.tar.gz gcc-aec0ee116cb445f5d7bbbaff3d39f60a8f7cb118.tar.bz2 | |
re PR tree-optimization/78574 (ice on valid C code at -O2 and -O3 in both 32- and 64-bit modes on x86_64-linux-gnu (internal compiler error: Segmentation fault (program cc1)))
PR tree-optimization/78574
* tree-ssa-loop-ivopts.c (find_deriving_biv_for_expr): Skip loop
header PHI that doesn't define biv.
gcc/testsuite
PR tree-optimization/78574
* gcc.c-torture/compile/pr78574.c: New test.
From-SVN: r243026
Diffstat (limited to 'gcc/tree-ssa-loop-ivopts.c')
| -rw-r--r-- | gcc/tree-ssa-loop-ivopts.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c index 5c667a2..00b287a 100644 --- a/gcc/tree-ssa-loop-ivopts.c +++ b/gcc/tree-ssa-loop-ivopts.c @@ -1853,6 +1853,11 @@ find_deriving_biv_for_expr (struct ivopts_data *data, tree expr) { ssa_op_iter iter; use_operand_p use_p; + basic_block phi_bb = gimple_bb (phi); + + /* Skip loop header PHI that doesn't define biv. */ + if (phi_bb->loop_father == data->current_loop) + return NULL; if (virtual_operand_p (gimple_phi_result (phi))) return NULL; |