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| author | Ian Lance Taylor <ian@airs.com> | 2005-07-18 23:20:09 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2005-07-18 23:20:09 +0000 |
| commit | 7825308e2053d319f1fb2162968bbf84a86acae3 (patch) | |
| tree | 635d996d3e9a7dd331e13ce0eb3e0a5e8017c64c /gcc | |
| parent | 2928d0f87052e921ddd212f32e20fd2add5f771b (diff) | |
| download | gcc-7825308e2053d319f1fb2162968bbf84a86acae3.zip gcc-7825308e2053d319f1fb2162968bbf84a86acae3.tar.gz gcc-7825308e2053d319f1fb2162968bbf84a86acae3.tar.bz2 | |
re PR middle-end/22057 (Poor -O0 debug information for for loops with no initializer)
PR middle-end/22057
* tree-cfgcleanup.c (cleanup_tree_cfg): Only remove forwarder
blocks when optimizing.
From-SVN: r102142
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/tree-cfgcleanup.c | 24 |
2 files changed, 22 insertions, 8 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c24f4b4..9cd5cff 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2005-07-18 Ian Lance Taylor <ian@airs.com> + + PR middle-end/22057 + * tree-cfgcleanup.c (cleanup_tree_cfg): Only remove forwarder + blocks when optimizing. + 2005-07-18 Steve Ellcey <sje@cup.hp.com> * common.opt (frename-registers): Initialize to 2. diff --git a/gcc/tree-cfgcleanup.c b/gcc/tree-cfgcleanup.c index bedee9b..51b2fc5 100644 --- a/gcc/tree-cfgcleanup.c +++ b/gcc/tree-cfgcleanup.c @@ -501,20 +501,28 @@ cleanup_tree_cfg (void) retval = cleanup_control_flow (); retval |= delete_unreachable_blocks (); - /* cleanup_forwarder_blocks can redirect edges out of SWITCH_EXPRs, - which can get expensive. So we want to enable recording of edge - to CASE_LABEL_EXPR mappings around the call to - cleanup_forwarder_blocks. */ - start_recording_case_labels (); - retval |= cleanup_forwarder_blocks (); - end_recording_case_labels (); + /* Forwarder blocks can carry line number information which is + useful when debugging, so we only clean them up when + optimizing. */ + + if (optimize > 0) + { + /* cleanup_forwarder_blocks can redirect edges out of + SWITCH_EXPRs, which can get expensive. So we want to enable + recording of edge to CASE_LABEL_EXPR mappings around the call + to cleanup_forwarder_blocks. */ + start_recording_case_labels (); + retval |= cleanup_forwarder_blocks (); + end_recording_case_labels (); + } #ifdef ENABLE_CHECKING if (retval) { gcc_assert (!cleanup_control_flow ()); gcc_assert (!delete_unreachable_blocks ()); - gcc_assert (!cleanup_forwarder_blocks ()); + if (optimize > 0) + gcc_assert (!cleanup_forwarder_blocks ()); } #endif |