[Bug middle-end/37813] New: assert with IRA_COVER_CLASSES with singleton

[hp at gcc dot gnu dot org]

With the IRA_COVER_CLASSES in cris.h changed as follows (exposing one of the
GENERAL_REGS that has special properties as a singleton class), build fails
compiling libgcc:

/home/hp/combw/crisv32-obj/./gcc/xgcc -B/home/hp/combw/crisv32-obj/./gcc/
-nostdinc -B/home/hp/combw/crisv32-obj/crisv32-elf/newlib/ -isystem
/home/hp/combw/crisv32-obj/crisv32-elf/newlib/targ-include -isystem
/home/hp/combw/combined/newlib/libc/include
-B/home/hp/combw/crisv32-obj/crisv32-elf/libgloss/cris
-L/home/hp/combw/crisv32-obj/crisv32-elf/libgloss/libnosys
-L/home/hp/combw/combined/libgloss/cris -B/tmp/reg-crisv32/crisv32-elf/bin/
-B/tmp/reg-crisv32/crisv32-elf/lib/ -isystem
/tmp/reg-crisv32/crisv32-elf/include -isystem
/tmp/reg-crisv32/crisv32-elf/sys-include -L/home/hp/combw/crisv32-obj/./ld -g
-O2 -O2  -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wwrite-strings
-Wstrict-prototypes -Wmissing-prototypes -Wcast-qual -Wold-style-definition 
-isystem ./include   -g  -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc 
-I. -I. -I../.././gcc -I/home/hp/combw/combined/libgcc
-I/home/hp/combw/combined/libgcc/. -I/home/hp/combw/combined/libgcc/../gcc
-I/home/hp/combw/combined/libgcc/../include  -DHAVE_CC_TLS -o _muldi3.o -MT
_muldi3.o -MD -MP -MF _muldi3.dep -DL_muldi3 -c
/home/hp/combw/combined/libgcc/../gcc/libgcc2.c \

/home/hp/combw/combined/libgcc/../gcc/libgcc2.c: In function '__muldi3':
/home/hp/combw/combined/libgcc/../gcc/libgcc2.c:566: internal compiler error:
in process_bb_node_lives, at ira-lives.c:677

Index: gcc/config/cris/cris.h
===================================================================
--- gcc/config/cris/cris.h      (revision 141074)
+++ gcc/config/cris/cris.h      (working copy)
@@ -597,7 +597,7 @@

 #define INDEX_REG_CLASS GENERAL_REGS

-#define IRA_COVER_CLASSES { GENERAL_REGS, SPECIAL_REGS, LIM_REG_CLASSES }
+#define IRA_COVER_CLASSES { ACR_REGS, GENNONACR_REGS, SPECIAL_REGS,
LIM_REG_CLASSES }

 #define REG_CLASS_FROM_LETTER(C)               \
   (                                            \

Preprocessed libgcc2.i to be attached.


-- 
           Summary: assert with IRA_COVER_CLASSES with singleton
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hp at gcc dot gnu dot org
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: crisv32-axis-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37813