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| author | Tom de Vries <tom@codesourcery.com> | 2015-06-08 11:53:27 +0000 |
|---|---|---|
| committer | Tom de Vries <vries@gcc.gnu.org> | 2015-06-08 11:53:27 +0000 |
| commit | 1b7f61ebc8920326b5dc30f79cfc86ef0cb7bb28 (patch) | |
| tree | 05a269611c4afd372c2778b7d951d8232bea1c84 /gcc/gimple-iterator.h | |
| parent | aa4e0c43bc9db9ae1411e4957720b887fe5e1edf (diff) | |
| download | gcc-1b7f61ebc8920326b5dc30f79cfc86ef0cb7bb28.zip gcc-1b7f61ebc8920326b5dc30f79cfc86ef0cb7bb28.tar.gz gcc-1b7f61ebc8920326b5dc30f79cfc86ef0cb7bb28.tar.bz2 | |
Fix try_transform_to_exit_first_loop_alt
2015-06-08 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/66442
* gimple-iterator.h (gimple_seq_nondebug_singleton_p): Add function.
* tree-parloops.c (try_transform_to_exit_first_loop_alt): Return false
if the loop latch is not a singleton. Use
gimple_seq_nondebug_singleton_p instead of gimple_seq_singleton_p.
From-SVN: r224218
Diffstat (limited to 'gcc/gimple-iterator.h')
| -rw-r--r-- | gcc/gimple-iterator.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/gcc/gimple-iterator.h b/gcc/gimple-iterator.h index 87e943a..d08245e 100644 --- a/gcc/gimple-iterator.h +++ b/gcc/gimple-iterator.h @@ -345,4 +345,39 @@ gsi_seq (gimple_stmt_iterator i) return *i.seq; } +/* Determine whether SEQ is a nondebug singleton. */ + +static inline bool +gimple_seq_nondebug_singleton_p (gimple_seq seq) +{ + gimple_stmt_iterator gsi; + gsi.ptr = gimple_seq_first (seq); + gsi.seq = &seq; + gsi.bb = NULL; + + /* Not a singleton if the sequence is empty. */ + if (gsi_end_p (gsi)) + return false; + + /* Find a nondebug gimple. */ + while (!gsi_end_p (gsi) + && is_gimple_debug (gsi_stmt (gsi))) + gsi_next (&gsi); + + /* Not a nondebug singleton if there's no nondebug gimple. */ + if (is_gimple_debug (gsi_stmt (gsi))) + return false; + + /* Find the next nondebug gimple. */ + while (!gsi_end_p (gsi) + && is_gimple_debug (gsi_stmt (gsi))) + gsi_next (&gsi); + + /* If there's a next nondebug gimple, it's not a nondebug singleton. */ + if (!gsi_end_p (gsi)) + return false; + + return true; +} + #endif /* GCC_GIMPLE_ITERATOR_H */ |