diff options
| author | Martin Liska <mliska@suse.cz> | 2018-10-22 15:09:33 +0200 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2018-10-22 13:09:33 +0000 |
| commit | d78bcb133d4559273bf6f6125f2659354e3f505e (patch) | |
| tree | 4e08ef3d6089ef46215679fc69d772ff9e2bf845 /gcc/tree-switch-conversion.c | |
| parent | c7acc2964eb184e9151a822cd74b96890804a81e (diff) | |
Revert r263947.
2018-10-22 Martin Liska <mliska@suse.cz>
PR tree-optimization/87686
Revert
2018-08-29 Martin Liska <mliska@suse.cz>
* tree-switch-conversion.c (switch_conversion::expand):
Strenghten assumption about gswitch statements.
2018-10-22 Martin Liska <mliska@suse.cz>
PR tree-optimization/87686
* g++.dg/tree-ssa/pr87686.C: New test.
From-SVN: r265388
Diffstat (limited to 'gcc/tree-switch-conversion.c')
| -rw-r--r-- | gcc/tree-switch-conversion.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/tree-switch-conversion.c b/gcc/tree-switch-conversion.c index 64169a6cd3d..ac2aa585257 100644 --- a/gcc/tree-switch-conversion.c +++ b/gcc/tree-switch-conversion.c @@ -913,7 +913,14 @@ switch_conversion::expand (gswitch *swtch) /* Group case labels so that we get the right results from the heuristics that decide on the code generation approach for this switch. */ m_cfg_altered |= group_case_labels_stmt (swtch); - gcc_assert (gimple_switch_num_labels (swtch) >= 2); + + /* If this switch is now a degenerate case with only a default label, + there is nothing left for us to do. */ + if (gimple_switch_num_labels (swtch) < 2) + { + m_reason = "switch is a degenerate case"; + return; + } collect (swtch); |