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| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/ira.c | 7 |
2 files changed, 12 insertions, 1 deletions
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 <vmakarov@redhat.com> + + PR rtl-optimization/49154 + * ira.c (setup_pressure_classes): Process class without sublcasses + as a candidate for pressure classes. + 2011-05-26 Richard Sandiford <rdsandiford@googlemail.com> 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 |