From beca87f70d44f5fa36a282ece8f905c976a9cb17 Mon Sep 17 00:00:00 2001 From: jakub Date: Thu, 3 Jun 2010 11:27:49 +0000 Subject: [PATCH] * var-tracking.c (dataflow_set_equiv_regs): Shortcut the loop if set->regs[i] is NULL or has just one entry. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@160216 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 8 +++++++- gcc/var-tracking.c | 5 +++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c397c2562d6c..8e4aed8a338d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2010-06-03 Jan Hubicka + Jakub Jelinek + + * var-tracking.c (dataflow_set_equiv_regs): Shortcut the loop if + set->regs[i] is NULL or has just one entry. + 2010-06-03 Jan Hubicka * lto-cgraph.c (lto_varpool_encoder_size): Remove. @@ -546,7 +552,7 @@ * tree-inline.c (estimate_num_insns): For stdarg functions look into call statement to count cost of argument passing. -2010-06-01 Kai Tietz +2010-06-01 Kai Tietz * config/i386.c (ix86_output_addr_vec_elt): Make LPREFIX argument for fprintf. diff --git a/gcc/var-tracking.c b/gcc/var-tracking.c index 967661274cec..76cd7f85b194 100644 --- a/gcc/var-tracking.c +++ b/gcc/var-tracking.c @@ -3694,6 +3694,11 @@ dataflow_set_equiv_regs (dataflow_set *set) { rtx canon[NUM_MACHINE_MODES]; + /* If the list is empty or one entry, no need to canonicalize + anything.  */ +  if (set->regs[i] == NULL || set->regs[i]->next == NULL) + continue; + memset (canon, 0, sizeof (canon)); for (list = set->regs[i]; list; list = list->next) -- 2.47.2