From: vmakarov Date: Thu, 26 May 2011 21:01:57 +0000 (+0000) Subject: 2011-05-26 Vladimir Makarov X-Git-Url: http://git.sourceforge.jp/view?a=commitdiff_plain;h=bc694d564384eb496a01037237da0c82d4fc5ab4;p=pf3gnuchains%2Fgcc-fork.git 2011-05-26 Vladimir Makarov PR rtl-optimization/49154 * ira.c (setup_pressure_classes): Process class without sublcasses as a candidate for pressure classes. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@174309 138bc75d-0d04-0410-961f-82ee72b054a4 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 60553d56680..8e487e407f2 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2011-05-26 Vladimir Makarov + + PR rtl-optimization/49154 + * ira.c (setup_pressure_classes): Process class without sublcasses + as a candidate for pressure classes. + 2011-05-26 Richard Sandiford PR rtl-optimization/48575 diff --git a/gcc/ira.c b/gcc/ira.c index 358ad0a37b1..222d48eb1c4 100644 --- a/gcc/ira.c +++ b/gcc/ira.c @@ -799,7 +799,12 @@ setup_pressure_classes (void) { if (ira_available_class_regs[cl] == 0) continue; - if (ira_available_class_regs[cl] != 1) + if (ira_available_class_regs[cl] != 1 + /* A register class without subclasses may contain a few + hard registers and movement between them is costly + (e.g. SPARC FPCC registers). We still should consider it + as a candidate for a pressure class. */ + && alloc_reg_class_subclasses[cl][0] != LIM_REG_CLASSES) { /* Check that the moves between any hard registers of the current class are not more expensive for a legal mode