[Bug target/40031] New: ARM broken with addresses in PHIs with -fPIC

[Bug target/40031] New: ARM broken with addresses in PHIs with -fPIC

[pinskia at gcc dot gnu dot org]

Testcase:
double c;
double d;
double *f(int a)
{
  if(a) return &c;
  return &d;
}


-- 
           Summary: ARM broken with addresses in PHIs with -fPIC
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, build
          Severity: blocker
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
GCC target triplet: arm-eabi


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

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

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.5.0


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

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

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2009-05-06 08:28 -------
What's the ICE?


-- 


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

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

[ramana 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++^[\^[[01;32mramana@gcc55^[[01;34m
~/build-20090505/armv5tel-unknown-linux-gnueabi/libstdc++-v3/libsupc++ $^[[00m
^[[Kgdb --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

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

[ramana at gcc dot gnu dot org]

------- Comment #3 from ramana at gcc dot gnu dot org  2009-05-06 10:59 -------
(In reply to comment #1)
> What's the ICE?
> 

With a cross arm-linux-gnueabi version r147153, I get a segfault with the
following backtrace for this particular testcase. 

#0  0x082112b1 in emit_insn_after_1 (first=0xb7c352d0, after=0xb7c324b0,
bb=0xb7c324d4) at /home/ramrad01/sourcearea/trunk/gcc/emit-rtl.c:4129
#1  0x0821214c in emit_insn_after (pattern=0x0, after=0xb7c324b0) at
/home/ramrad01/sourcearea/trunk/gcc/emit-rtl.c:4335
#2  0x085eb5b7 in legitimize_pic_address (orig=0xb7c41c08, mode=SImode,
reg=0x0) at /home/ramrad01/sourcearea/trunk/gcc/config/arm/arm.c:3599
#3  0x086b2ead in gen_movsi (operand0=0x0, operand1=0xb7c41c08) at
/home/ramrad01/sourcearea/trunk/gcc/config/arm/arm.md:4966
#4  0x0824ad24 in emit_move_insn_1 (x=0xb7c39ce0, y=0xb7c41c08) at
/home/ramrad01/sourcearea/trunk/gcc/expr.c:3337
#5  0x0824b012 in emit_move_insn (x=0xb7c39ce0, y=0xb7c41c08) at
/home/ramrad01/sourcearea/trunk/gcc/expr.c:3425
#6  0x087d1923 in expand_phi_nodes (sa=0x8acb174) at
/home/ramrad01/sourcearea/trunk/gcc/tree-outof-ssa.c:211
#7  0x08754d77 in gimple_expand_cfg () at
/home/ramrad01/sourcearea/trunk/gcc/cfgexpand.c:2506
#8  0x08381d8d in execute_one_pass (pass=0x8a2f720) at
/home/ramrad01/sourcearea/trunk/gcc/passes.c:1291
#9  0x0838200c in execute_pass_list (pass=0x8a2f720) at
/home/ramrad01/sourcearea/trunk/gcc/passes.c:1340
#10 0x0848a6c0 in tree_rest_of_compilation (fndecl=0xb7c34680) at
/home/ramrad01/sourcearea/trunk/gcc/tree-optimize.c:394
#11 0x085fd902 in cgraph_expand_function (node=0xb7bb8a00) at
/home/ramrad01/sourcearea/trunk/gcc/cgraphunit.c:1051
#12 0x085ff7cf in cgraph_optimize () at
/home/ramrad01/sourcearea/trunk/gcc/cgraphunit.c:1110
#13 0x080cec7b in c_write_global_declarations () at
/home/ramrad01/sourcearea/trunk/gcc/c-decl.c:8364
#14 0x084334a6 in toplev_main (argc=20, argv=0xbf806e84) at
/home/ramrad01/sourcearea/trunk/gcc/toplev.c:990
#15 0x08152f82 in main (argc=Cannot access memory at address 0x0
) at /home/ramrad01/sourcearea/trunk/gcc/main.c:35


-- 

ramana at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-05-06 10:59:43
               date|                            |


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

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

[ramana at gcc dot gnu dot org]

------- Comment #4 from ramana at gcc dot gnu dot org  2009-05-07 08:10 -------
*** Bug 40053 has been marked as a duplicate of this bug. ***


-- 

ramana at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |laurent at guerby dot net


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

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

[laurent at guerby dot net]

------- Comment #5 from laurent at guerby dot net  2009-05-10 09:28 -------

For the record at rev 147290 even with c++ disabled the bootstrap failed on
libmudflap:

libtool: compile:  /home/guerby/build/./gcc/xgcc -B/home/guerby/build/./gcc/
-B/n/50/guerby/install-trunk-147290/armv5tel-unknown-linux-gnueabi/bin/
-B/n/50/guerby/install-trunk-147290/armv5tel-unknown-linux-gnueabi/lib/
-isystem
/n/50/guerby/install-trunk-147290/armv5tel-unknown-linux-gnueabi/include
-isystem
/n/50/guerby/install-trunk-147290/armv5tel-unknown-linux-gnueabi/sys-include
-DHAVE_CONFIG_H -I. -I../../../trunk/libmudflap -I. -Wall -ffunction-sections
-fdata-sections -g -O2 -MT mf-runtime.lo -MD -MP -MF .deps/mf-runtime.Tpo -c
../../../trunk/libmudflap/mf-runtime.c  -fPIC -DPIC -o .libs/mf-runtime.o
../../../trunk/libmudflap/mf-runtime.c: In function '__mf_describe_object':
../../../trunk/libmudflap/mf-runtime.c:1725: internal compiler error:
Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[4]: *** [mf-runtime.lo] Error 1
make[4]: Leaving directory
`/home/guerby/build/armv5tel-unknown-linux-gnueabi/libmudflap'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory
`/home/guerby/build/armv5tel-unknown-linux-gnueabi/libmudflap'
make[2]: *** [all] Error 2
make[2]: Leaving directory
`/home/guerby/build/armv5tel-unknown-linux-gnueabi/libmudflap'
make[1]: *** [all-target-libmudflap] Error 2
make[1]: Leaving directory `/home/guerby/build'
make: *** [bootstrap] Error 2


-- 


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

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

[matz at gcc dot gnu dot org]

------- Comment #6 from matz at gcc dot gnu dot org  2009-05-10 18:17 -------
I haven't yet committed the patch that Ramana tested.  Have you applied it
manually?  Otherwise the breakage is expected.


-- 


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

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

[laurent at guerby dot net]

------- Comment #7 from laurent at guerby dot net  2009-05-10 18:23 -------
I confirm I didn't apply your patch on the build that failed libmudflap.


-- 


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

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

[matz at gcc dot gnu dot org]

------- Comment #8 from matz at gcc dot gnu dot org  2009-05-10 18:40 -------
Subject: Bug 40031

Author: matz
Date: Sun May 10 18:40:16 2009
New Revision: 147350

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=147350
Log:
        PR target/40031
        * config/arm/arm.c (require_pic_register): Emit on entry
        edge, not at entry of function.
testsuite/
        * gcc.dg/pr40031.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr40031.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm.c
    trunk/gcc/testsuite/ChangeLog


-- 


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

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

[matz at gcc dot gnu dot org]

------- Comment #9 from matz at gcc dot gnu dot org  2009-05-10 18:41 -------
Now I have, hence fixed.


-- 

matz at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


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