From 574e418a27bf8e841df886a8156b9e1e6b362fc7 Mon Sep 17 00:00:00 2001 From: Vladimir Makarov Date: Thu, 26 May 2011 21:01:57 +0000 Subject: [PATCH] re PR rtl-optimization/49154 (build fails on cris-elf in libgcc: ICE in setup_pressure_classes, at ira.c:902) 2011-05-26 Vladimir Makarov PR rtl-optimization/49154 * ira.c (setup_pressure_classes): Process class without sublcasses as a candidate for pressure classes. From-SVN: r174309 --- gcc/ChangeLog | 6 ++++++ gcc/ira.c | 7 ++++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 60553d566801..8e487e407f27 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 358ad0a37b1d..222d48eb1c45 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 -- 2.47.3