[Bug target/40031] [4.5 Regression] ARM broken with addresses in PHIs with -fPIC

["ramana at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #2 from ramana at gcc dot gnu dot org  2009-05-06 08:46 -------
Can't replicate this with a stage2 or stage3 compiler with O2, O3, Os -fPIC
{-mthumb} with r147121. 

However while bootstrapping the above mentioned revision, I get a segfault as
in http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39929#c12 but with . 

ramana@gcc55:~/build-20090505/armv5tel-unknown-linux-gnueabi/libstdc++-v3/libsupc++\ramana@gcc55
~/build-20090505/armv5tel-unknown-linux-gnueabi/libstdc++-v3/libsupc++ $
gdb --args  /home/ramana/build-20090505/./gcc/cc1 -quiet -v -I..
-I/home/ramana/trunk/libstdc++-v3/../libiberty
-I/home/ramana/trunk/libstdc++-v3/../include
-I/home/ramana/build-20090505/armv5tel-unknown-linux-gnueabi/libstdc++-v3/include/armv5tel-unknown-linux-gnueabi
-I/home/ramana/build-20090505/armv5tel-unknown-linux-gnuea 
bi/libstdc++-v3/include -I/home/ramana/trunk/libstdc++-v3/libsupc++ -iprefix
/home/ramana/build-20090505/gcc/../lib/gcc/armv5tel-unknown-linux-gnueabi/4.5.0/
-isystem /home/ramana/build-20090505/./gcc/include -isystem
/home/ramana/build-20090505/./gcc/include-fixed -DHAVE_CONFIG_H -DIN_GLIBCPP_V3
-DPIC -isystem /usr/local/armv5tel-unknown-linux-gnueabi/include -isystem
/usr/local/armv5tel-unknown-linux-gnueabi/sys-include cp-demangle.c -quiet
-dumpbase cp-demangle.c -auxbase-strip cp-demangle.o -g -O2 -Wno-error -version
-fPIC -o /tmp/ccIO2OGk.s


(gdb) r

Starting program: /home/ramana/build-20090505/gcc/cc1 -quiet -v -I..
-I/home/ramana/trunk/libstdc++-v3/../libiberty
-I/home/ramana/trunk/libstdc++-v3/../include
-I/home/ramana/build-20090505/armv5tel-unknown-linux-gnueabi/libstdc++-v3/include/armv5tel-unknown-linux-gnueabi
-I/home/ramana/build-20090505/armv5tel-unknown-linux-gnueabi/libstdc++-v3/include
-I/home/ramana/trunk/libstdc++-v3/libsupc++ -iprefix
/home/ramana/build-20090505/gcc/../lib/gcc/armv5tel-unknown-linux-gnueabi/4.5.0/
-isystem /home/ramana/build-20090505/./gcc/include -isystem
/home/ramana/build-20090505/./gcc/include-fixed -DHAVE_CONFIG_H -DIN_GLIBCPP_V3
-DPIC -isystem /usr/local/armv5tel-unknown-linux-gnueabi/include -isystem
/usr/local/armv5tel-unknown-linux-gnueabi/sys-include cp-demangle.c -quiet
-dumpbase cp-demangle.c -auxbase-strip cp-demangle.o -g -O2 -Wno-error -version
-fPIC -o /tmp/ccIO2OGk.s

GNU C (GCC) version 4.5.0 20090505 (experimental) [trunk revision 147121]
(armv5tel-unknown-linux-gnueabi)

        compiled by GNU C version 4.5.0 20090505 (experimental) [trunk revision
147121], GMP version 4.2.4, MPFR version 2.3.2.

GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096


Program received signal SIGSEGV, Segmentation fault.
emit_insn_after_1 (first=0x403790f0, after=0x40588f50, bb=0xa5a5a5a5) at
../../trunk/gcc/emit-rtl.c:4129
4129          if (BB_END (bb) == after)
(gdb) bt
#0  emit_insn_after_1 (first=0x403790f0, after=0x40588f50, bb=0xa5a5a5a5) at
../../trunk/gcc/emit-rtl.c:4129
#1  0x0053cc60 in legitimize_pic_address (orig=0x40595b80, mode=<value
optimized out>, reg=0x0) at ../../trunk/gcc/config/arm/arm.c:3600
#2  0x00602060 in gen_movsi (operand0=0x0, operand1=<value optimized out>) at
../../trunk/gcc/config/arm/arm.md:4966
#3  0x001e72c0 in emit_move_insn_1 (x=0x40706d38, y=0x40595b80) at
../../trunk/gcc/expr.c:3337
#4  0x001e756c in emit_move_insn (x=0x40706d38, y=0x40595b80) at
../../trunk/gcc/expr.c:3425
#5  0x001c3a60 in force_reg (mode=SImode, x=0x40595b80) at
../../trunk/gcc/explow.c:663
#6  0x001c4a90 in use_anchored_address (x=0x403d8350) at
../../trunk/gcc/explow.c:583
#7  0x001dd558 in expand_expr_real_1 (exp=0x404a8b40, target=<value optimized
out>, tmode=<value optimized out>, modifier=<value optimized out>, alt_rtl=0x0)
at ../../trunk/gcc/expr.c:7329
#8  0x001e6110 in expand_expr_real (exp=0x404a8b40, target=0x40588f50,
tmode=VOIDmode, modifier=EXPAND_WRITE, alt_rtl=0x0) at
../../trunk/gcc/expr.c:7114
#9  0x001ea070 in expand_expr_addr_expr_1 (exp=0x404a8b40, target=0x0,
tmode=SImode, modifier=EXPAND_NORMAL) at ../../trunk/gcc/expr.h:539
#10 0x001e9e14 in expand_expr_addr_expr_1 (exp=0x405fb690, target=0x40706630,
tmode=SImode, modifier=EXPAND_NORMAL) at ../../trunk/gcc/expr.c:6838
#11 0x001db5d4 in expand_expr_real_1 (exp=0x405c1fc0, target=0x40706630,
tmode=<value optimized out>, modifier=<value optimized out>, alt_rtl=0x0) at
../../trunk/gcc/expr.c:6897
#12 0x001e6110 in expand_expr_real (exp=0x405c1fc0, target=0x40588f50,
tmode=VOIDmode, modifier=EXPAND_WRITE, alt_rtl=0x0) at
../../trunk/gcc/expr.c:7114
#13 0x0072be90 in eliminate_phi (e=0x405fb900, g=0xa39f08) at
../../trunk/gcc/expr.h:539
#14 0x0072cb6c in expand_phi_nodes (sa=<value optimized out>) at
../../trunk/gcc/tree-outof-ssa.c:777
#15 0x006b4800 in gimple_expand_cfg () at ../../trunk/gcc/cfgexpand.c:2506
#16 0x002fcdf0 in execute_one_pass (pass=0x95dcfc) at
../../trunk/gcc/passes.c:1291
#17 0x002fd07c in execute_pass_list (pass=0x95dcfc) at
../../trunk/gcc/passes.c:1340
#18 0x003fa1e0 in tree_rest_of_compilation (fndecl=0x403cc580) at
../../trunk/gcc/tree-optimize.c:394
#19 0x0054e584 in cgraph_expand_function (node=0x4047cf00) at
../../trunk/gcc/cgraphunit.c:1051
#20 0x0055059c in cgraph_optimize () at ../../trunk/gcc/cgraphunit.c:1110
#21 0x0008ba4c in c_write_global_declarations () at
../../trunk/gcc/c-decl.c:8364
#22 0x003a7384 in toplev_main (argc=1073882620, argv=0x400cf804) at
../../trunk/gcc/toplev.c:990
#23 0x400e0e2c in __libc_start_main () from /lib/libc.so.6
#24 0x0007a428 in _start ()


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40031