From 6040d650ce037f83f42f7273d1bd34aa735d88cc Mon Sep 17 00:00:00 2001 From: mpolacek Date: Thu, 4 Apr 2013 15:48:25 +0000 Subject: [PATCH] PR tree-optimization/48186 * predict.c (maybe_hot_frequency_p): Return false if HOT_BB_FREQUENCY_FRACTION is 0. (cgraph_maybe_hot_edge_p): Likewise. * gcc.dg/pr48186.c: New test. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@197487 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 7 +++++++ gcc/predict.c | 13 +++++++++---- gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/gcc.dg/pr48186.c | 5 +++++ 4 files changed, 26 insertions(+), 4 deletions(-) create mode 100644 gcc/testsuite/gcc.dg/pr48186.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 970c0d9..d301109 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2013-04-04 Marek Polacek + + PR tree-optimization/48186 + * predict.c (maybe_hot_frequency_p): Return false if + HOT_BB_FREQUENCY_FRACTION is 0. + (cgraph_maybe_hot_edge_p): Likewise. + 2013-04-04 Richard Biener PR tree-optimization/56826 diff --git a/gcc/predict.c b/gcc/predict.c index 52a4bb4..1871976 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -122,6 +122,8 @@ maybe_hot_frequency_p (struct function *fun, int freq) if (node->frequency == NODE_FREQUENCY_EXECUTED_ONCE && freq < (ENTRY_BLOCK_PTR_FOR_FUNCTION (fun)->frequency * 2 / 3)) return false; + if (PARAM_VALUE (HOT_BB_FREQUENCY_FRACTION) == 0) + return false; if (freq < (ENTRY_BLOCK_PTR_FOR_FUNCTION (fun)->frequency / PARAM_VALUE (HOT_BB_FREQUENCY_FRACTION))) return false; @@ -202,10 +204,13 @@ cgraph_maybe_hot_edge_p (struct cgraph_edge *edge) if (edge->caller->frequency == NODE_FREQUENCY_EXECUTED_ONCE && edge->frequency < CGRAPH_FREQ_BASE * 3 / 2) return false; - if (flag_guess_branch_prob - && edge->frequency <= (CGRAPH_FREQ_BASE - / PARAM_VALUE (HOT_BB_FREQUENCY_FRACTION))) - return false; + if (flag_guess_branch_prob) + { + if (PARAM_VALUE (HOT_BB_FREQUENCY_FRACTION) == 0 + || edge->frequency <= (CGRAPH_FREQ_BASE + / PARAM_VALUE (HOT_BB_FREQUENCY_FRACTION))) + return false; + } return true; } diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index a65b101..b2ca50b 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2013-04-04 Marek Polacek + + PR tree-optimization/48186 + * gcc.dg/pr48186.c: New test. + 2013-04-04 Richard Biener PR tree-optimization/56826 diff --git a/gcc/testsuite/gcc.dg/pr48186.c b/gcc/testsuite/gcc.dg/pr48186.c new file mode 100644 index 0000000..5635f93 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr48186.c @@ -0,0 +1,5 @@ +/* PR tree-optimization/48186 */ +/* { dg-do compile } */ +/* { dg-options "-O --param hot-bb-frequency-fraction=0" } */ + +void foo (void) { } -- 2.7.4