diff options
Diffstat (limited to 'gcc/tree-ssa-loop-im.cc')
| -rw-r--r-- | gcc/tree-ssa-loop-im.cc | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/gcc/tree-ssa-loop-im.cc b/gcc/tree-ssa-loop-im.cc index 225964c..a3ca5af 100644 --- a/gcc/tree-ssa-loop-im.cc +++ b/gcc/tree-ssa-loop-im.cc @@ -143,6 +143,8 @@ public: different modes. */ }; +static bool in_loop_pipeline; + /* We use six bits per loop in the ref->dep_loop bitmap to record the dep_kind x dep_state combinations. */ @@ -1239,7 +1241,11 @@ compute_invariantness (basic_block bb) lim_data->cost); } - if (lim_data->cost >= LIM_EXPENSIVE) + if (lim_data->cost >= LIM_EXPENSIVE + /* When we run before PRE and PRE is active hoist all expressions + since PRE would do so anyway and we can preserve range info + but PRE cannot. */ + || (flag_tree_pre && !in_loop_pipeline)) set_profitable_level (stmt); } } @@ -3759,7 +3765,7 @@ public: unsigned int pass_lim::execute (function *fun) { - bool in_loop_pipeline = scev_initialized_p (); + in_loop_pipeline = scev_initialized_p (); if (!in_loop_pipeline) loop_optimizer_init (LOOPS_NORMAL | LOOPS_HAVE_RECORDED_EXITS); |