[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[nickc at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #18 from Nick Clifton  ---
Hi Bernd,

> I am still unsure, if we shouldn't also do something like this,
> to prevent any remaining possibility for a further regression:

> +  /* Don't change the frame info after reload completed.  */
> +  if (reload_completed)
> +return;

Actually that might not be a bad idea.  Or maybe, to be even more paranoid, we
should check that a post-reload frame computation matches the last pre-reload
frame computation.  Hmm, maybe that is going to far.

Anyway I like your patch idea, but I cannot approve it.  Maybe the MIPS
maintainers will like it...

Cheers
   Nick

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[edlinger at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

Bernd Edlinger  changed:

   What|Removed |Added

 Status|WAITING |RESOLVED
 Resolution|--- |FIXED

--- Comment #17 from Bernd Edlinger  ---
I'd declare it fixed with Nick's check-in from yesterday.

Thanks for reporting.

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #16 from Bernd Edlinger  ---
(In reply to Nick Clifton from comment #15)
> Hi Guys,
> 
>   I have checked in Bernd's patch as it also fixes PR 69129.  I think that
> this PR can also be closed now, although I am not sure if we need to add
> another testcase to gcc.target/mips.  (I added a testcase for pr69129...)
> 
> Cheers
>   Nick

Very nice test case.  Thanks!

I am still unsure, if we shouldn't also do something like this,
to prevent any remaining possibility for a further regression:

Index: gcc/config/mips/mips.c
===
--- gcc/config/mips/mips.c  (revision 231954)
+++ gcc/config/mips/mips.c  (working copy)
@@ -10321,6 +10321,10 @@ mips_compute_frame_info (void)
   HOST_WIDE_INT offset, size;
   unsigned int regno, i;

+  /* Don't change the frame info after reload completed.  */
+  if (reload_completed)
+return;
+
   /* Set this function's interrupt properties.  */
   if (mips_interrupt_type_p (TREE_TYPE (current_function_decl)))
 {

(I proposed that, but Richard S. raised objections against it)

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[nickc at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

Nick Clifton  changed:

   What|Removed |Added

 Status|NEW |WAITING
 CC||nickc at gcc dot gnu.org

--- Comment #15 from Nick Clifton  ---
Hi Guys,

  I have checked in Bernd's patch as it also fixes PR 69129.  I think that this
PR can also be closed now, although I am not sure if we need to add another
testcase to gcc.target/mips.  (I added a testcase for pr69129...)

Cheers
  Nick

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[nickc at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #14 from Nick Clifton  ---
Author: nickc
Date: Thu Jan 21 14:07:01 2016
New Revision: 232674

URL: https://gcc.gnu.org/viewcvs?rev=232674&root=gcc&view=rev
Log:
PR target/69129
PR target/69012
* config/mips/mips.c (mips_compute_frame_info): Initialise
args_size and hard_frame_pointer_offset fields of the frame
structure before calling mips_global_pointer.

PR target/69129
* gcc.target/mips/pr69129.c: New.

Added:
trunk/gcc/testsuite/gcc.target/mips/pr69129.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/mips/mips.c
trunk/gcc/testsuite/ChangeLog

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #13 from Bernd Edlinger  ---
(In reply to Bernd Edlinger from comment #12)
> 
> glibc-config:
> ../glibc-2.22/configure --prefix=/home/ed/gnu/mips-linux-gnu/mips-linux-gnu
> --build=mips-linux-gnu --disable-werror CC=mips-linux-gnu-gcc
> 

correction, the glibc-config was actually wrong:

../glibc-2.22/configure --prefix=/home/ed/gnu/mips-linux-gnu/mips-linux-gnu
--host=mips-linux-gnu --disable-werror

then I can build a full cross gcc:

../gcc-trunk/configure --prefix=/home/ed/gnu/mips-linux-gnu
--target=mips-linux-gnu --enable-languages=c,c++,fortran,ada

and then finally canadian cross:

../gcc-trunk/configure --prefix=/home/ed/gnu/mips-linux-gnu
--target=mips-linux-gnu --enable-languages=c,c++,fortran,ada
--host=mips-linux-gnu

(which fails currently in an in-tree mpfr issue: pr69134

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[edlinger at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

Bernd Edlinger  changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
   Last reconfirmed||2015-12-25
 Ever confirmed|0   |1

--- Comment #12 from Bernd Edlinger  ---
confirmed, I encountered it too when compiling a cross-glibc

gcc-config:
../gcc-trunk/configure --prefix=/home/ed/gnu/mips-linux-gnu
--target=mips-linux-gnu --enable-languages=c --disable-shared --disable-threads
--disable-libssp --disable-libgomp --disable-libquadmath --disable-libatomic

glibc-config:
../glibc-2.22/configure --prefix=/home/ed/gnu/mips-linux-gnu/mips-linux-gnu
--build=mips-linux-gnu --disable-werror CC=mips-linux-gnu-gcc

mips-linux-gnu-gcc -mabi=32 ../sysdeps/ieee754/dbl-64/e_remainder.c -c
-std=gnu99 -fgnu89-inline  -O2 -Wall -Wundef -Wwrite-strings
-fmerge-all-constants -frounding-math -g -Wstrict-prototypes  
-Wno-uninitialized-D__NO_MATH_INLINES -D__LIBC_INTERNAL_MATH_INLINES
-DNO_LONG_DOUBLE -D_Mlong_double_=double -I../include
-I/home/ed/gnu/glibc-build-mips/math  -I/home/ed/gnu/glibc-build-mips 
-I../sysdeps/unix/sysv/linux/mips/mips32/fpu 
-I../sysdeps/unix/sysv/linux/mips/mips32  -I../sysdeps/unix/sysv/linux/mips 
-I../sysdeps/mips/nptl  -I../sysdeps/unix/sysv/linux/include
-I../sysdeps/unix/sysv/linux  -I../sysdeps/nptl  -I../sysdeps/pthread 
-I../sysdeps/gnu  -I../sysdeps/unix/inet  -I../sysdeps/unix/sysv 
-I../sysdeps/unix/mips/mips32  -I../sysdeps/unix/mips  -I../sysdeps/unix 
-I../sysdeps/posix  -I../sysdeps/mips/mips32/fpu  -I../sysdeps/mips/mips32 
-I../sysdeps/mips/ieee754  -I../sysdeps/mips/include -I../sysdeps/mips 
-I../sysdeps/ieee754/flt-32  -I../sysdeps/ieee754/dbl-64 
-I../sysdeps/wordsize-32  -I../sysdeps/mips/fpu  -I../sysdeps/ieee754 
-I../sysdeps/generic  -I.. -I../libio -I.   -D_LIBC_REENTRANT -include
/home/ed/gnu/glibc-build-mips/libc-modules.h -DMODULE_NAME=libm -include
../include/libc-symbols.h  -DPIC -o
/home/ed/gnu/glibc-build-mips/math/e_remainder.o -MD -MP -MF
/home/ed/gnu/glibc-build-mips/math/e_remainder.o.dt -MT
/home/ed/gnu/glibc-build-mips/math/e_remainder.o
../sysdeps/ieee754/dbl-64/e_remainder.c: In function '__ieee754_remainder':
../sysdeps/ieee754/dbl-64/e_remainder.c:149:1: error: unrecognizable insn:
 }
 ^

(insn 911 910 912 2 (parallel [
(set (mem/c:SI (plus:SI (reg/f:SI 29 $sp)
(const_int 16 [0x10])) [8  S4 A32])
(unspec:SI [
(const_int 16 [0x10])
(reg:SI 28 $28)
] UNSPEC_POTENTIAL_CPRESTORE))
(clobber (scratch:SI))
]) ../sysdeps/ieee754/dbl-64/e_remainder.c:45 -1
 (expr_list:REG_DEAD (reg:SI 28 $28)
(nil)))
../sysdeps/ieee754/dbl-64/e_remainder.c:149:1: internal compiler error: in
get_attr_got, at config/mips/mips.md:694
0xa4c2aa _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc-trunk/gcc/rtl-error.c:108
0xa4c2d9 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../gcc-trunk/gcc/rtl-error.c:116
0xea6616 get_attr_got(rtx_insn*)
../../gcc-trunk/gcc/config/mips/mips.md:694
0xdc4128 mips_insn_has_flexible_gp_ref_p
../../gcc-trunk/gcc/config/mips/mips.c:9927
0xdc11fe mips_find_gp_ref
../../gcc-trunk/gcc/config/mips/mips.c:9858
0xdc1ee7 mips_global_pointer
../../gcc-trunk/gcc/config/mips/mips.c:9979
0xdc1ee7 mips_compute_frame_info
../../gcc-trunk/gcc/config/mips/mips.c:10350
0xdce2ce mips_initial_elimination_offset(int, int)
../../gcc-trunk/gcc/config/mips/mips.c:10591
0xa4dbd2 rtx_addr_can_trap_p_1
../../gcc-trunk/gcc/rtlanal.c:618
0xa4da67 rtx_addr_can_trap_p_1
../../gcc-trunk/gcc/rtlanal.c:679
0xa51737 may_trap_p_1(rtx_def const*, unsigned int)
../../gcc-trunk/gcc/rtlanal.c:2819
0x723b28 can_move_insns_across(rtx_insn*, rtx_insn*, rtx_insn*, rtx_insn*,
basic_block_def*, bitmap_head*, bitmap_head*, rtx_insn**)
../../gcc-trunk/gcc/df-problems.c:4156
0xf342c8 try_head_merge_bb
../../gcc-trunk/gcc/cfgcleanup.c:2502
0xf342c8 try_optimize_cfg
../../gcc-trunk/gcc/cfgcleanup.c:2832
0xf342c8 cleanup_cfg(int)
../../gcc-trunk/gcc/cfgcleanup.c:3028
0xf349a6 execute
../../gcc-trunk/gcc/cfgcleanup.c:3157
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See  for instructions.
make[2]: *** [/home/ed/gnu/glibc-build-mips/math/e_remainder.o] Error 1
make[2]: Leaving directory `/home/ed/gnu/glibc-2.22/math'
make[1]: *** [math/others] Error 2
make[1]: Leaving directory `/home/ed/gnu/glibc-2.22'
make: *** [all] Error 2

this is also fixed by patch in comment#11

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #11 from Bernd Edlinger  ---
ok, now I see.  try this:

Index: gcc/config/mips/mips.c
===
--- gcc/config/mips/mips.c  (revision 231927)
+++ gcc/config/mips/mips.c  (working copy)
@@ -10347,8 +10347,6 @@ mips_compute_frame_info (void)
   memset (frame, 0, sizeof (*frame));
   size = get_frame_size ();

-  cfun->machine->global_pointer = mips_global_pointer ();
-
   /* The first two blocks contain the outgoing argument area and the $gp save
  slot.  This area isn't needed in leaf functions.  We can also skip it
  if we know that none of the called functions will use this space.
@@ -10377,6 +10375,17 @@ mips_compute_frame_info (void)
 }
   offset = frame->args_size + frame->cprestore_size;

+  /* MIPS16 code offsets the frame pointer by the size of the outgoing
+ arguments.  This tends to increase the chances of using unextended
+ instructions for local variables and incoming arguments.  */
+  if (TARGET_MIPS16)
+frame->hard_frame_pointer_offset = frame->args_size;
+
+  /* The function mips_global_pointer walks all insns and some depend
+ on the predicate function mips_cprestore_address_p, which uses
+ frame->args_size and frame->hard_frame_pointer_offset.  */
+  cfun->machine->global_pointer = mips_global_pointer ();
+
   /* Move above the local variables.  */
   frame->var_size = MIPS_STACK_ALIGN (size);
   offset += frame->var_size;
@@ -10520,12 +10529,6 @@ mips_compute_frame_info (void)
 frame->acc_save_offset = frame->acc_sp_offset - offset;
   if (frame->num_cop0_regs > 0)
 frame->cop0_save_offset = frame->cop0_sp_offset - offset;
-
-  /* MIPS16 code offsets the frame pointer by the size of the outgoing
- arguments.  This tends to increase the chances of using unextended
- instructions for local variables and incoming arguments.  */
-  if (TARGET_MIPS16)
-frame->hard_frame_pointer_offset = frame->args_size;
 }

 /* Return the style of GP load sequence that is being used for the

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[paul.hua.gm at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #10 from Paul Hua  ---
(In reply to Bernd Edlinger from comment #9)
> (In reply to Paul Hua from comment #8)
> > (In reply to Bernd Edlinger from comment #6)
> > > (In reply to Paul Hua from comment #5)
> > > > Created attachment 37115 [details]
> > > > building command
> > > 
> > > I'm unable to reproduce.
> > > What is your cross-compiler command line?
> > 
> 
> 
> and how exactly did you configure your cross compiler?

I'm compared the diff between your configure and mine, find something that my
configure specify the --with-build-time-tools=xxx. If don't specify the
--with-build-time-tools=xxx the gcc(both r225249 and r225260) can be build
successfully. This is the reason why you can't reproduce.

But, when specify the --with-build-time-tools=xxx the gcc r225249 can be build
successfully. The gcc r225260 failed, the error is same as above. 

The --with-build-time-tools=xxx is the binutils installed dir.

binutils cross-compiler configure with:

../../binutils-gdb_git_trunk/configure
--prefix=/home/xuchenghua/toolchain/cross-compiler/gcc-6.0.0
--build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=mipsel-redhat-linux-gnu

gcc cross-compiler configure with:

../../gcc_git_trunk/configure --prefix=/home/xuchenghua/gcc-trunk
--target=mipsel-redhat-linux --with-arch=mips64r2 --with-abi=32
--enable-threads=posix --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --disable-dssi --disable-multilib
--enable-languages=c --enable-shared
--with-build-time-tools=/home/xuchenghua/toolchain/cross-compiler/gcc-6.0.0/mipsel-redhat-linux-gnu/bin/

I'm sorry for wasted your time.

thanks.

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #9 from Bernd Edlinger  ---
(In reply to Paul Hua from comment #8)
> (In reply to Bernd Edlinger from comment #6)
> > (In reply to Paul Hua from comment #5)
> > > Created attachment 37115 [details]
> > > building command
> > 
> > I'm unable to reproduce.
> > What is your cross-compiler command line?
> 


and how exactly did you configure your cross compiler?

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[paul.hua.gm at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #8 from Paul Hua  ---

(In reply to Bernd Edlinger from comment #6)
> (In reply to Paul Hua from comment #5)
> > Created attachment 37115 [details]
> > building command
> 
> I'm unable to reproduce.
> What is your cross-compiler command line?

The command line have been submitted on comment #4：

$where_build_obj/gcc/cc1 -fpreprocessed maxval_r4.i -mel -quiet -dumpbase
maxval_r4.c -mabi=32 -minterlink-mips16 -march=mips64r2 -mllsc -mips64r2
-mno-shared -auxbase-strip maxval_r4.o -g -O2 -Wall -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -Wextra -Wwrite-strings
-Werror=implicit-function-declaration -Werror=vla -Wunknown-pragmas -std=gnu11
-std=gnu11 -version -fcx-fortran-rules -ffunction-sections -fdata-sections -o
maxval_r4.s

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #7 from Bernd Edlinger  ---
FYI, I used:
../gcc-trunk/configure --prefix=/home/ed/gnu/mips64el-unknown-linux
--target=mips64el-unknown-linux --enable-languages=c --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --enable-plugin --enable-initfini-array
--with-arch=mips64r2 --with-abi=64 --enable-gnu-indirect-function
--with-long-double-128 --enable-shared --enable-threads=posix --disable-libgcc
--disable-libssp --disable-libgomp --disable-libquadmath --disable-libatomic

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #6 from Bernd Edlinger  ---
(In reply to Paul Hua from comment #5)
> Created attachment 37115 [details]
> building command

I'm unable to reproduce.
What is your cross-compiler command line?

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[paul.hua.gm at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #5 from Paul Hua  ---
Created attachment 37115
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37115&action=edit
building command

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[paul.hua.gm at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #4 from Paul Hua  ---
Created attachment 37114
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37114&action=edit
preprocessed source for maxval_r4.c

The compile command line :

cc1 -fpreprocessed maxval_r4.i -mel -quiet -dumpbase maxval_r4.c -mabi=32
-minterlink-mips16 -march=mips64r2 -mllsc -mips64r2 -mno-shared -auxbase-strip
maxval_r4.o -g -O2 -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wextra -Wwrite-strings
-Werror=implicit-function-declaration -Werror=vla -Wunknown-pragmas -std=gnu11
-std=gnu11 -version -fcx-fortran-rules -ffunction-sections -fdata-sections -o
maxval_r4.s

Thanks.

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #3 from Bernd Edlinger  ---
I will have a look, but please,
can you attach a preprocessed source for maxval_r4.c


Thanks.

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[paul.hua.gm at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

Paul Hua  changed:

   What|Removed |Added

 CC||bernd.edlinger at hotmail dot 
de

--- Comment #2 from Paul Hua  ---
The "internal compiler error" appeared after trunk revision 225260, and the
revision 225249 can be successfully compiled.

The r225260 show:

commit 32e90dc6a0cda452b426b370326e315ac6f10f02
Author: edlinger 
Date:   Wed Jul 1 16:10:30 2015 +

gcc/ChangeLog:
2015-07-01  Bernd Edlinger  

PR rtl-optimization/61047
* rtlanal.c (get_initial_register_offset): New function.
(rtx_addr_can_trap_p_1): Check offsets of stack references.

testsuite/ChangeLog:
2015-07-01  Bernd Edlinger  

PR rtl-optimization/61047
* gcc.c-torture/execute/20150611-1.c: New testcase.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@225260
138bc75d-0d04-0410-961f-82ee72b054a4

any one can fixing this ?

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[paul.hua.gm at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

--- Comment #1 from Paul Hua  ---
The cross compile also crashed ...

/home/xuchenghua/GCC/mips/gcc-trunk-231896-o32_obj/./gcc/xgcc
-B/home/xuchenghua/GCC/mips/gcc-trunk-231896-o32_obj/./gcc/
-B/home/xuchenghua/toolchain/cross-tool
s/gcc-o32/usr/mipsel-redhat-linux/bin/
-B/home/xuchenghua/toolchain/cross-tools/gcc-o32/usr/mipsel-redhat-linux/lib/
-isystem /home/xuchenghua/toolchain/cross-tools/gcc-o32/usr/mipsel-redhat-linux
/include -isystem
/home/xuchenghua/toolchain/cross-tools/gcc-o32/usr/mipsel-redhat-linux/sys-include
-DHAVE_CONFIG_H -I. -I../../../../gcc_git_trunk/libgfortran
-iquote../../../../gcc_git_trunk/li
bgfortran/io -I../../../../gcc_git_trunk/libgfortran/../gcc
-I../../../../gcc_git_trunk/libgfortran/../gcc/config -I../.././gcc
-I../../../../gcc_git_trunk/libgfortran/../libgcc -I../libgcc -I../.
./../../gcc_git_trunk/libgfortran/../libbacktrace -I../libbacktrace
-I../libbacktrace -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wextra -Wwrite-strings -Werr
or=implicit-function-declaration -Werror=vla -fcx-fortran-rules
-ffunction-sections -fdata-sections -std=gnu11 -g -O2 -minterlink-mips16
-Wunknown-pragmas -MT maxval_r4.lo -MD -MP -MF .deps/maxval
_r4.Tpo -c ../../../../gcc_git_trunk/libgfortran/generated/maxval_r4.c -o
maxval_r4.o
../../../../gcc_git_trunk/libgfortran/generated/maxval_r4.c: In function
'maxval_r4':
../../../../gcc_git_trunk/libgfortran/generated/maxval_r4.c:200:1: error:
unrecognizable insn:
 }
 ^

(insn 688 687 690 2 (parallel [
(set (mem/c:SI (plus:SI (reg/f:SI 29 $sp)
(const_int 16 [0x10])) [11  S4 A32])
(unspec:SI [
(const_int 16 [0x10])
(reg:SI 28 $28)
] UNSPEC_POTENTIAL_CPRESTORE))
(clobber (scratch:SI))
]) ../../../../gcc_git_trunk/libgfortran/generated/maxval_r4.c:42 -1
 (expr_list:REG_DEAD (reg:SI 28 $28)
(nil)))
../../../../gcc_git_trunk/libgfortran/generated/maxval_r4.c:200:1: internal
compiler error: in get_attr_got, at config/mips/mips.md:694

Host：x86_64-redhat-linux
Target：mipsel-redhat-linux

The cross compile configured with:
  $ ../../gcc_git_trunk/configure
--prefix=/home/xuchenghua/toolchain/cross-tools/gcc-o32/usr
--with-sysroot=/home/xuchenghua/toolchain/cross-tools/gcc-o32/usr/mipsel-redhat-linux/sysroot
--target=mipsel-redhat-linux --with-arch=mips64r2 --with-abi=32
--with-gmp=/home/xuchenghua/toolchain/cross-tools/gcc-o32/usr/
--with-mpfr=/home/xuchenghua/toolchain/cross-tools/gcc-o32/usr/
--with-mpc=/home/xuchenghua/toolchain/cross-tools/gcc-o32/usr/
--enable-threads=posix --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --disable-dssi --disable-multilib
--enable-languages=c,c++,objc,obj-c++,fortran,go,lto --enable-shared
--with-build-time-tools=/home/xuchenghua/toolchain/cross-tools/gcc-o32/usr/mipsel-redhat-linux/bin
--with-pkgversion=gcc 20151222 commit: gcc-trunk-231896 

This may be help to reproduced。

[Bug target/69012] gcc-6.0.0 internal compiler error building libgfortran for mips64el target

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69012

Marek Polacek  changed:

   What|Removed |Added

 CC||mpolacek at gcc dot gnu.org
   Severity|critical|normal