http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52148
Bug #: 52148
Summary: [4.7 regression] ICE: in spill_failure, at
reload1.c:2120
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: mhlav...@redhat.com
Created attachment 26601
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26601
pre-processed reproducer
gcc 4.7 fails on code that was working in 4.6 without any problem
Version: 4.7.0-20120204
Target: avr
Problem happens only when optimization (O2 or O3) is used.
Pre-processed reproducer attached.
$ avr-gcc -mmcu=atmega64 -O2 allsrce.cpp -c -o allsrc.o
allsrce.cpp: In function 'void applyExpos(int16_t*, uint8_t)':
allsrce.cpp:68:1: error: unable to find a register to spill in class
'POINTER_REGS'
allsrce.cpp:68:1: error: this is the insn:
(insn 17 16 9 2 (parallel [
(set (mem:BLK (reg:HI 26 r26) [0 A8])
(mem:BLK (reg/v/f:HI 97 [ anas ]) [0 A8]))
(unspec [
(const_int 0 [0])
] UNSPEC_MOVMEM)
(use (reg:QI 24 r24 [99]))
(clobber (reg:HI 26 r26))
(clobber (reg:HI 30 r30))
(clobber (reg:QI 0 r0))
(clobber (reg:QI 24 r24 [99]))
]) allsrce.cpp:49 29 {movmem_qi}
(expr_list:REG_DEAD (reg:QI 24 r24 [99])
(expr_list:REG_DEAD (reg:QI 27 r27)
(expr_list:REG_UNUSED (reg:QI 24 r24 [99])
(expr_list:REG_UNUSED (reg:QI 0 r0)
(expr_list:REG_UNUSED (reg:HI 30 r30)
(expr_list:REG_UNUSED (reg:HI 26 r26)
(nil))))))))
allsrce.cpp:68:1: internal compiler error: in spill_failure, at reload1.c:2120
Please submit a full bug report,
with preprocessed source if appropriate.
Additional information:
$ avr-gcc -v
Using built-in specs.
COLLECT_GCC=avr-gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/avr/4.7.0/lto-wrapper
Target: avr
Configured with: ../gcc-4.7-20120204/configure --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info --target=avr
--enable-languages=c,c++ --disable-nls --disable-libssp --with-system-zlib
--enable-version-specific-runtime-libs --with-pkgversion='Fedora 4.7-0.fc16.1'
--with-bugurl=https://bugzilla.redhat.com/
Thread model: single
gcc version 4.7.0 20120204 (experimental) (Fedora 4.7-0.fc16.1)
