diff options
Diffstat (limited to 'gcc/predict.c')
| -rw-r--r-- | gcc/predict.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/gcc/predict.c b/gcc/predict.c index 986284744bd..18e044a04b0 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -50,7 +50,7 @@ along with GCC; see the file COPYING3. If not see #include "params.h" #include "target.h" #include "cfgloop.h" -#include "tree-flow.h" +#include "tree-ssa.h" #include "ggc.h" #include "tree-pass.h" #include "tree-scalar-evolution.h" @@ -2852,13 +2852,14 @@ compute_function_frequency (void) { basic_block bb; struct cgraph_node *node = cgraph_get_node (current_function_decl); + if (DECL_STATIC_CONSTRUCTOR (current_function_decl) || MAIN_NAME_P (DECL_NAME (current_function_decl))) node->only_called_at_startup = true; if (DECL_STATIC_DESTRUCTOR (current_function_decl)) node->only_called_at_exit = true; - if (!profile_info || !flag_branch_probabilities) + if (profile_status != PROFILE_READ) { int flags = flags_from_decl_or_type (current_function_decl); if (lookup_attribute ("cold", DECL_ATTRIBUTES (current_function_decl)) @@ -2876,7 +2877,13 @@ compute_function_frequency (void) node->frequency = NODE_FREQUENCY_EXECUTED_ONCE; return; } - node->frequency = NODE_FREQUENCY_UNLIKELY_EXECUTED; + + /* Only first time try to drop function into unlikely executed. + After inlining the roundoff errors may confuse us. + Ipa-profile pass will drop functions only called from unlikely + functions to unlikely and that is most of what we care about. */ + if (!cfun->after_inlining) + node->frequency = NODE_FREQUENCY_UNLIKELY_EXECUTED; FOR_EACH_BB (bb) { if (maybe_hot_bb_p (cfun, bb)) |