[Bug bootstrap/40597] New: Powerpc bootstrap is broken due to changes in expmed.c

[Bug bootstrap/40597] New: Powerpc bootstrap is broken due to changes in expmed.c

[meissner at gcc dot gnu dot org]

On June 28th, the powerpc bootstrap was broken due to changes to expmed.c.  The
bootstrap dies when compiling libgcc.a as mentioned in:
http://gcc.gnu.org/ml/gcc-patches/2009-06/msg02180.html

emit_store_flag gets a GT test that it tries to convert to LE.  Inside the
recursive call, it then tries to convert the LE back to a GT test.  Eventually
the compiler runs out of stack space and dies.


-- 
           Summary: Powerpc bootstrap is broken due to changes in expmed.c
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: meissner at gcc dot gnu dot org
 GCC build triplet: powerpc64-unknown-linux-gnu
  GCC host triplet: powerpc64-unknown-linux-gnu
GCC target triplet: powerpc64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #1 from bonzini at gnu dot org  2009-06-29 21:32 -------
Mine of course.  I was going to post the patch to the mailing list after it was
well into my x86_64-linux bootstrap, I'll add it here.

Thanks for the testcase BTW.


-- 

bonzini at gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |bonzini at gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-06-29 21:32:47
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #2 from bonzini at gnu dot org  2009-06-29 21:34 -------
Created an attachment (id=18096)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18096&action=view)
patch currently in stage2

Here it is.  A bit early for posting to gcc-patches, but if you want to approve
it I'll commit it tomorrow morning, after making sure the bootstrap/regtest
passes.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[meissner at gcc dot gnu dot org]

------- Comment #3 from meissner at gcc dot gnu dot org  2009-06-29 21:36 -------
Created an attachment (id=18097)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18097&action=view)
Proposed patch to fix the problem

This patch allows the powerpc64-gnu-linux system to boostrap once again.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[meissner at linux dot vnet dot ibm dot com]

------- Comment #4 from meissner at linux dot vnet dot ibm dot com  2009-06-29 21:46 -------
Subject: Re:  Powerpc bootstrap is broken due to changes in expmed.c

On Mon, Jun 29, 2009 at 09:34:02PM -0000, bonzini at gnu dot org wrote:
> 
> 
> ------- Comment #2 from bonzini at gnu dot org  2009-06-29 21:34 -------
> Created an attachment (id=18096)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18096&action=view)
>  --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18096&action=view)
> patch currently in stage2
> 
> Here it is.  A bit early for posting to gcc-patches, but if you want to approve
> it I'll commit it tomorrow morning, after making sure the bootstrap/regtest
> passes.
> 
> 
> -- 
> 
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597
> 
> ------- You are receiving this mail because: -------
> You reported the bug, or are watching the reporter.

Approved assuming it passes bootstrap/regtest.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[meissner at linux dot vnet dot ibm dot com]

------- Comment #5 from meissner at linux dot vnet dot ibm dot com  2009-06-30 04:20 -------
Subject: Re:  Powerpc bootstrap is broken due to
        changes in expmed.c

On Mon, Jun 29, 2009 at 09:32:47PM -0000, bonzini at gnu dot org wrote:
> 
> 
> ------- Comment #1 from bonzini at gnu dot org  2009-06-29 21:32 -------
> Mine of course.  I was going to post the patch to the mailing list after it was
> well into my x86_64-linux bootstrap, I'll add it here.
> 
> Thanks for the testcase BTW.
> 
> 
> -- 
> 
> bonzini at gnu dot org changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>          AssignedTo|unassigned at gcc dot gnu   |bonzini at gnu dot org
>                    |dot org                     |
>              Status|UNCONFIRMED                 |ASSIGNED
>      Ever Confirmed|0                           |1
>    Last reconfirmed|0000-00-00 00:00:00         |2009-06-29 21:32:47
>                date|                            |
> 
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597
> 
> ------- You are receiving this mail because: -------
> You reported the bug, or are watching the reporter.

With my patch, I get 4 regressions compared to the sources I snapped on Friday
(subversion #148954):

gcc.c-torture/execute/20071030-1.c
gcc.c-torture/compile/pr37258.c
gfortran.dg/negative_unit_int8.f
gfortran.fortran-torture/execute/inquire_5.f90

On the other hand, I get one pass that used to fail:
gfortran.dg/proc_ptr_result_1.f90


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #7 from bonzini at gnu dot org  2009-06-30 07:59 -------
The bootstrap was successful on x86_64-linux, I'll look at the failures
tonight.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gcc dot gnu dot org]

------- Comment #6 from bonzini at gnu dot org  2009-06-30 07:59 -------
Subject: Bug 40597

Author: bonzini
Date: Tue Jun 30 07:59:01 2009
New Revision: 149083

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=149083
Log:
2009-06-30  Paolo Bonzini  <bonzini@gnu.org>

        PR boostrap/40597
        * expmed.c (emit_cstore): New name of emit_store_flag_1.
        (emit_store_flag_1): Extract from emit_store_flag, adjust
        calls to (what now is) emit_cstore.
        (emit_store_flag): Call emit_store_flag_1 and also use it
        for what used to be recursive calls.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/expmed.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[dje at gcc dot gnu dot org]

------- Comment #8 from dje at gcc dot gnu dot org  2009-06-30 14:50 -------
Now I see failures when building libgcc:

../../.././gcc/dp-bit.c: In function '__pack_d':
../../.././gcc/dp-bit.c:268:39: internal compiler error: in simplify_subreg, at 
simplify-rtx.c:4966


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[dje at gcc dot gnu dot org]

------- Comment #9 from dje at gcc dot gnu dot org  2009-06-30 15:07 -------
The traceback leads to the store flag change.

(gdb) print op
$3 = (rtx) 0x30153558
(gdb) pr
(reg:SI 234)
(gdb) print innermode
$4 = DImode
(gdb) print outermode
$5 = SImode

#0  fancy_abort (file=0x10e8a5b8 "/farm/dje/src/src/gcc/simplify-rtx.c", 
    line=4966, function=0x10e8a7b8 "simplify_subreg")
    at /farm/dje/src/src/gcc/diagnostic.c:730
#1  0x105d4920 in simplify_subreg (outermode=SImode, op=0x30153558, 
    innermode=DImode, byte=0) at /farm/dje/src/src/gcc/simplify-rtx.c:4965
#2  0x105d6204 in simplify_gen_subreg (outermode=SImode, op=0x30153558, 
    innermode=DImode, byte=0) at /farm/dje/src/src/gcc/simplify-rtx.c:5273
#3  0x1012a0ac in operand_subword (op=0x30153558, offset=0, 
    validate_address=1, mode=DImode) at /farm/dje/src/src/gcc/emit-rtl.c:1394
#4  0x1012a130 in operand_subword_force (op=0x30153558, offset=0, mode=DImode)
    at /farm/dje/src/src/gcc/emit-rtl.c:1407
#5  0x107abb8c in expand_binop (mode=DImode, binoptab=0x20055a60, 
    op0=0x30153558, op1=0x3000c460, target=0x3015f498, unsignedp=1, 
    methods=OPTAB_WIDEN) at /farm/dje/src/src/gcc/optabs.c:1738
#6  0x105b8318 in emit_store_flag (target=0x3015f498, code=NE, op0=0x30153528, 
    op1=0x3000c450, mode=SImode, unsignedp=1, normalizep=1)
    at /farm/dje/src/src/gcc/expmed.c:5583
#7  0x105b7144 in emit_store_flag_1 (target=0x3015f498, code=NE, 
    op0=0x301534e0, op1=0x3000c450, mode=DImode, unsignedp=1, normalizep=1)
    at /farm/dje/src/src/gcc/expmed.c:5310
#8  0x105b75e4 in emit_store_flag (target=0x3015f498, code=NE, op0=0x301534e0, 
    op1=0x3000c450, mode=DImode, unsignedp=1, normalizep=1)
    at /farm/dje/src/src/gcc/expmed.c:5424
#9  0x105b8944 in emit_store_flag_force (target=0x3015f498, code=NE, 
    op0=0x301534e0, op1=0x3000c450, mode=DImode, unsignedp=1, normalizep=1)
    at /farm/dje/src/src/gcc/expmed.c:5733
#10 0x103e4a08 in do_store_flag (exp=0x30165780, target=0x3015f498, 
    mode=DImode) at /farm/dje/src/src/gcc/expr.c:9877
#11 0x103ddc58 in expand_expr_real_1 (exp=0x30165780, target=0x3015f498, 
    tmode=DImode, modifier=EXPAND_NORMAL, alt_rtl=0x2ff20348)
    at /farm/dje/src/src/gcc/expr.c:9109
#12 0x103cc03c in expand_expr_real (exp=0x30165780, target=0x3015f498, 
    tmode=DImode, modifier=EXPAND_NORMAL, alt_rtl=0x2ff20348)
    at /farm/dje/src/src/gcc/expr.c:7177
#13 0x103bb8f8 in store_expr (exp=0x30165780, target=0x3015f498, 
    call_param_p=0, nontemporal=5) at /farm/dje/src/src/gcc/expr.c:4644
#14 0x103ba000 in expand_assignment (to=0x30158118, from=0x30165780, 
    nontemporal=1240688) at /farm/dje/src/src/gcc/expr.c:4428
#15 0x103df0e0 in expand_expr_real_1 (exp=0x30165820, target=0x0, 
    tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /farm/dje/src/src/gcc/expr.c:9256
#16 0x103cc03c in expand_expr_real (exp=0x30165820, target=0x3000c450, 
    tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /farm/dje/src/src/gcc/expr.c:7177
#17 0x108f14e0 in expand_expr (exp=0x30165820, target=0x3000c450, 
    mode=VOIDmode, modifier=EXPAND_NORMAL) at /farm/dje/src/src/gcc/expr.h:542
#18 0x108f30d4 in expand_expr_stmt (exp=0x30165820)
    at /farm/dje/src/src/gcc/stmt.c:1353
#19 0x108e9a50 in expand_gimple_basic_block (bb=0x3000e558)
    at /farm/dje/src/src/gcc/cfgexpand.c:2146
#20 0x108ec75c in gimple_expand_cfg ()
    at /farm/dje/src/src/gcc/cfgexpand.c:2586
#21 0x10663db0 in execute_one_pass (pass=0x20094c18)
    at /farm/dje/src/src/gcc/passes.c:1289
#22 0x106641e8 in execute_pass_list (pass=0x20094c18)
    at /farm/dje/src/src/gcc/passes.c:1338
#23 0x10918560 in tree_rest_of_compilation (fndecl=0x3008e180)
    at /farm/dje/src/src/gcc/tree-optimize.c:394
#24 0x108b7b70 in cgraph_expand_function (node=0x30126200)
    at /farm/dje/src/src/gcc/cgraphunit.c:1097
#25 0x108b7e30 in cgraph_expand_all_functions ()
    at /farm/dje/src/src/gcc/cgraphunit.c:1156
#26 0x108b86d8 in cgraph_optimize () at /farm/dje/src/src/gcc/cgraphunit.c:1379
#27 0x1003851c in c_write_global_declarations ()
    at /farm/dje/src/src/gcc/c-decl.c:9410
#28 0x10002b80 in compile_file () at /farm/dje/src/src/gcc/toplev.c:1037
#29 0x10006060 in do_compile () at /farm/dje/src/src/gcc/toplev.c:2346
#30 0x10006198 in toplev_main (argc=5, argv=0x2ff22444)
    at /farm/dje/src/src/gcc/toplev.c:2391


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[janis at gcc dot gnu dot org]

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------- Comment #10 from janis at gcc dot gnu dot org  2009-06-30 16:46 -------
Bootstrap of trunk revision 149105 fails on powerpc64-linux with the same ICE
that David reported in comment #8, but building stage2:

/libcpp/expr.c: In function ‘_cpp_parse_expr’:
/home/janis/gcc_trunk_anonsvn/gcc/libcpp/expr.c:901:1: internal compiler error:
in simplify_subreg, at simplify-rtx.c:4966

I'll get more information.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #11 from bonzini at gnu dot org  2009-06-30 16:53 -------
Subject: Re:  Powerpc bootstrap is broken due to changes 
        in expmed.c

What happens with this patch?

Index: expmed.c
===================================================================
--- expmed.c    (revision 149106)
+++ expmed.c    (working copy)
@@ -5307,7 +5307,7 @@
                                  OPTAB_DIRECT);

          if (op0both != 0)
-           return emit_store_flag (target, code, op0both, op1, word_mode,
+           return emit_store_flag (NULL_RTX, code, op0both, op1, word_mode,
                                    unsignedp, normalizep);
        }
       else if ((code == LT || code == GE) && op1 == const0_rtx)
@@ -5318,7 +5318,7 @@
          op0h = simplify_gen_subreg (word_mode, op0, mode,
                                      subreg_highpart_offset (word_mode,
                                                              mode));
-         return emit_store_flag (target, code, op0h, op1, word_mode,
+         return emit_store_flag (NULL_RTX, code, op0h, op1, word_mode,
                                  unsignedp, normalizep);
        }
     }

(I'll see tonight if it cures also Michael's failures).


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[dje at gcc dot gnu dot org]

------- Comment #12 from dje at gcc dot gnu dot org  2009-06-30 17:01 -------
I tried bootstrapping with that patch and it did not solve the bootstrap
failure in simplify_subreg.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[dje at gcc dot gnu dot org]

------- Comment #13 from dje at gcc dot gnu dot org  2009-06-30 18:16 -------
The failure appears to need a compiler built in 32 bit mode.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

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------- Comment #14 from bergner at gcc dot gnu dot org  2009-06-30 18:40 -------
Confirmed, a --with-cpu=default32 build dies with:

/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/builtins.c: In function
‘get_memory_rtx’:
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/builtins.c:1210:10: internal
compiler error: in simplify_subreg, at simplify-rtx.c:4966
Please submit a full bug report,

while a --with-cpu=default64 built fine using the patch in Comment #11.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #15 from bonzini at gnu dot org  2009-06-30 19:40 -------
Guys, when something breaks can you attach preprocessed testcases?...


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

------- Comment #16 from bergner at gcc dot gnu dot org  2009-06-30 21:02 -------
Created an attachment (id=18103)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18103&action=view)
Preprocessed testcase

Preprocessed source file compiled with:

/home/bergner/gcc/PR40597/build/gcc-mainline-base-32/./prev-gcc/xgcc
-B/home/bergner/gcc/PR40597/build/gcc-mainline-base-32/./prev-gcc/
-B/home/bergner/gcc/PR40597/install/gcc-mainline-base-32/powerpc64-linux/bin/
-B/home/bergner/gcc/PR40597/install/gcc-mainline-base-32/powerpc64-linux/bin/
-B/home/bergner/gcc/PR40597/install/gcc-mainline-base-32/powerpc64-linux/lib/
-isystem
/home/bergner/gcc/PR40597/install/gcc-mainline-base-32/powerpc64-linux/include
-isystem
/home/bergner/gcc/PR40597/install/gcc-mainline-base-32/powerpc64-linux/sys-include
   -c  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror
-Wold-style-definition -Wc++-compat -fno-common  -DHAVE_CONFIG_H -I. -I.
-I/home/bergner/gcc/PR40597/gcc-mainline-base/gcc
-I/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/.
-I/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/../include
-I/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/../libcpp/include
-I/home/bergner/tools/gmp-mpfr-ppc32/include
-I/home/bergner/tools/gmp-mpfr-ppc32/include
-I/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/../libdecnumber
-I/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/../libdecnumber/dpd
-I../libdecnumber    /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/c-common.c
-o c-common.o

configure options:

--target=powerpc64-linux --host=powerpc64-linux --build=powerpc64-linux
--with-cpu=default32 --enable-threads=posix --enable-shared
--enable-__cxa_atexit --enable-languages=c,c++,fortran,objc,obj-c++
--enable-secureplt --enable-checking=yes --with-long-double-128
--enable-decimal-float --disable-alsa


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #17 from bonzini at gnu dot org  2009-06-30 21:31 -------
Regarding powerpc64, I see no difference at -O2 in assembly output between
2009-06-26 version and the version after the patch attached to this bug.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

------- Comment #18 from bergner at gcc dot gnu dot org  2009-06-30 21:57 -------
This is my backtrace:

#0  fancy_abort (file=0x1091d148
"/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/simplify-rtx.c", line=4966, 
    function=0x1091dc04 "simplify_subreg") at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/diagnostic.c:730
#1  0x1043eab4 in simplify_subreg (outermode=SImode, op=0xf6ef5620,
innermode=DImode, byte=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/simplify-rtx.c:4965
#2  0x1043f69c in simplify_gen_subreg (outermode=<value optimized out>,
op=<value optimized out>, innermode=<value optimized out>, 
    byte=<value optimized out>) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/simplify-rtx.c:5273
#3  0x1023759c in operand_subword (op=0xf6ef5620, offset=0, validate_address=1,
mode=DImode)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/emit-rtl.c:1394
#4  0x102375fc in operand_subword_force (op=<value optimized out>,
offset=<value optimized out>, mode=DImode)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/emit-rtl.c:1407
#5  0x10392efc in expand_binop (mode=DImode, binoptab=0x10b206a0,
op0=0xf6ef5620, op1=0xf7e8e820, target=0xf6ef5640, unsignedp=1, 
    methods=OPTAB_DIRECT) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/optabs.c:1817
#6  0x10247d08 in expand_shift (code=<value optimized out>, mode=DImode,
shifted=0xf6ef5620, amount=0xf7c15810, target=0x0, 
    unsignedp=1) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expmed.c:2233
#7  0x10249d2c in expand_sdiv_pow2 (mode=DImode, op0=0xf7376b40, d=<value
optimized out>)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expmed.c:3778
#8  0x1024c25c in expand_divmod (rem_flag=0, code=<value optimized out>,
mode=DImode, op0=0xf7376b40, op1=0xf7e8e4d0, target=0x0, 
    unsignedp=0) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expmed.c:4227
#9  0x1026c1b4 in expand_expr_real_1 (exp=0xf6fc4450, target=0x0,
tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:8836
#10 0x10263a00 in expand_expr_real_1 (exp=0xf6276400, target=0x0,
tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:7328
#11 0x1026fcf4 in expand_expr_real (exp=0xf6276400, target=0x0, tmode=VOIDmode,
modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:7183
#12 0x101b2188 in expand_normal (exp=<value optimized out>) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.h:548
#13 0x101b5584 in precompute_register_parameters (num_actuals=2, args=<value
optimized out>, reg_parm_seen=0xffaa960c)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/calls.c:677
#14 0x101b83e0 in expand_call (exp=0xf6fc43f0, target=0xf7376dc0, ignore=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/calls.c:2721
#15 0x10266f84 in expand_expr_real_1 (exp=0xf6fc43f0, target=0xf7376dc0,
tmode=SImode, modifier=EXPAND_NORMAL, alt_rtl=0xffaa9830)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:8142
#16 0x1026fcd0 in expand_expr_real (exp=0xf6fc43f0, target=0xf7376dc0,
tmode=SImode, modifier=EXPAND_NORMAL, alt_rtl=0xffaa9830)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:7177
#17 0x10272290 in store_expr (exp=<value optimized out>, target=0xf7376dc0,
call_param_p=0, nontemporal=0 '\0')
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:4644
#18 0x102609f0 in expand_assignment (to=0xf6276440, from=0xf6fc43f0,
nontemporal=0 '\0')
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:4428
#19 0x1026e318 in expand_expr_real_1 (exp=0xf6fc4420, target=0x0,
tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:9256
#20 0x1026fcd0 in expand_expr_real (exp=0xf6fc4420, target=0xf7e8e450,
tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:7177
#21 0x10444dd4 in expand_expr (exp=<value optimized out>, target=<value
optimized out>, mode=<value optimized out>, 
    modifier=<value optimized out>) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.h:542
#22 0x10444e14 in expand_expr_stmt (exp=<value optimized out>) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/stmt.c:1353
#23 0x107629ec in expand_gimple_basic_block (bb=0xf66e3280) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/cfgexpand.c:2146
#24 0x10763238 in gimple_expand_cfg () at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/cfgexpand.c:2586
#25 0x103a21b0 in execute_one_pass (pass=0x10b5fcd0) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/passes.c:1289
#26 0x103a2390 in execute_pass_list (pass=0x10b5fcd0) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/passes.c:1338
#27 0x104be108 in tree_rest_of_compilation (fndecl=0xf659a600) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/tree-optimize.c:394
#28 0x10649d00 in cgraph_expand_function (node=0xf65b9500) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/cgraphunit.c:1097
#29 0x1064babc in cgraph_expand_all_functions () at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/cgraphunit.c:1156
#30 0x1064c184 in cgraph_optimize () at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/cgraphunit.c:1379
#31 0x100958a4 in c_write_global_declarations () at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/c-decl.c:9410
#32 0x1045bc8c in compile_file () at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/toplev.c:1037
#33 0x1045d1f0 in do_compile () at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/toplev.c:2346
#34 0x1045d2c8 in toplev_main (argc=14, argv=0xffaa9f04) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/toplev.c:2391
#35 0x1016e8a8 in main (argc=14, argv=0xffaa9f04) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/main.c:35


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #19 from bonzini at gnu dot org  2009-06-30 22:13 -------
I have a patch that seems to fix the problem, but I am afraid it's just
papering over it.  Since the attached file does not fail without the patch from
comment #11, would you please attach a testcase that fails without the patch,
i.e. on current mainline?


-- 

bonzini at gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2009-06-29 21:32:47         |2009-06-30 22:13:10
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

------- Comment #20 from bergner at gcc dot gnu dot org  2009-07-01 03:26 -------
Here's a backtrace for a 32-bit default build without Comment #11 patch:


#0  fancy_abort (file=0x1096c5e4
"/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/simplify-rtx.c", line=4966, 
    function=0x1096d0a0 "simplify_subreg") at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/diagnostic.c:730
#1  0x1045fd9c in simplify_subreg (outermode=SImode, op=0xf7b5a140,
innermode=DImode, byte=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/simplify-rtx.c:4965
#2  0x104615c4 in simplify_gen_subreg (outermode=<value optimized out>,
op=<value optimized out>, innermode=<value optimized out>, 
    byte=<value optimized out>) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/simplify-rtx.c:5273
#3  0x1024966c in operand_subword (op=0xf7b5a140, offset=0, validate_address=1,
mode=DImode)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/emit-rtl.c:1394
#4  0x102496cc in operand_subword_force (op=<value optimized out>,
offset=<value optimized out>, mode=DImode)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/emit-rtl.c:1407
#5  0x103aeee0 in expand_binop (mode=DImode, binoptab=0x10b6c5f8,
op0=0xf7b5a140, op1=0xf7e8e460, target=0xf7b5a0c0, unsignedp=1, 
    methods=OPTAB_WIDEN) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/optabs.c:1738
#6  0x1025a8f8 in emit_store_flag (target=0xf7b5a0c0, code=NE, op0=0xf7b5a100,
op1=0xf7e8e450, mode=SImode, 
    unsignedp=<value optimized out>, normalizep=1) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expmed.c:5583
#7  0x1025a070 in emit_store_flag_1 (target=0xf7b5a0c0, code=NE,
op0=0xf7b5a0e0, op1=0xf7e8e450, mode=DImode, unsignedp=1, 
    normalizep=1) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expmed.c:5310
#8  0x1025a7a4 in emit_store_flag (target=0xf7b5a0c0, code=NE, op0=0xf7d192a0,
op1=0xf7d192c0, mode=DImode, unsignedp=1, normalizep=1)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expmed.c:5550
#9  0x1025ad50 in emit_store_flag_force (target=<value optimized out>,
code=<value optimized out>, op0=<value optimized out>, 
    op1=<value optimized out>, mode=<value optimized out>, unsignedp=<value
optimized out>, normalizep=<value optimized out>)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expmed.c:5733
#10 0x1027f098 in expand_expr_real_1 (exp=0xf786d540, target=0xf7b5a0c0,
tmode=DImode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:9877
#11 0x10272dbc in expand_expr_real_1 (exp=0xf7a4e940, target=0x0, tmode=DImode,
modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:7328
#12 0x102822d4 in expand_expr_real (exp=0xf7a4e940, target=0x0, tmode=DImode,
modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:7183
#13 0x10277a2c in expand_expr_real_1 (exp=0xf7b5a0a0, target=0xf7d0bf60,
tmode=DImode, modifier=<value optimized out>, 
    alt_rtl=0xffc167b0) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.h:542
#14 0x102822d4 in expand_expr_real (exp=0xf7b5a0a0, target=0xf7d0bf60,
tmode=DImode, modifier=EXPAND_NORMAL, alt_rtl=0xffc167b0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:7183
#15 0x10289eb4 in store_expr (exp=<value optimized out>, target=0xf7d0bf60,
call_param_p=0, nontemporal=0 '\0')
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:4644
#16 0x1026faa0 in expand_assignment (to=0xf7cbd140, from=0xf7b5a0a0,
nontemporal=0 '\0')
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:4428
#17 0x10280058 in expand_expr_real_1 (exp=0xf786d510, target=0x0,
tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:9256
#18 0x102822d4 in expand_expr_real (exp=0xf786d510, target=0xf7e8e450,
tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:7183
#19 0x1046b7f0 in expand_expr_stmt (exp=<value optimized out>) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.h:542
#20 0x107ac2dc in expand_gimple_basic_block (bb=0xf7b79e10) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/cfgexpand.c:2146
#21 0x107ad900 in gimple_expand_cfg () at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/cfgexpand.c:2586
#22 0x103bfbc8 in execute_one_pass (pass=0x10babe08) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/passes.c:1289
#23 0x103bfdac in execute_pass_list (pass=0x10babe08) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/passes.c:1338
#24 0x104e6000 in tree_rest_of_compilation (fndecl=0xf7c9d380) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/tree-optimize.c:394
#25 0x10695b9c in cgraph_expand_function (node=0xf7d05600) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/cgraphunit.c:1098
#26 0x10698940 in cgraph_optimize () at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/cgraphunit.c:1157
#27 0x100958e4 in c_write_global_declarations () at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/c-decl.c:9410
#28 0x10480e7c in toplev_main (argc=24, argv=0xffc16e64) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/toplev.c:1037
#29 0x1016e8e8 in main (argc=24, argv=0xffc16e64) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/main.c:35


(gdb) frame 1
#1  0x1045fd9c in simplify_subreg (outermode=SImode, op=0xf7b5a140,
innermode=DImode, byte=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/simplify-rtx.c:4965
4965      gcc_assert (GET_MODE (op) == innermode
(gdb) pr op
(reg:SI 1170)
(gdb) frame 8
#8  0x1025a7a4 in emit_store_flag (target=0xf7b5a0c0, code=NE, op0=0xf7d192a0,
op1=0xf7d192c0, mode=DImode, unsignedp=1, normalizep=1)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expmed.c:5550
5550            tem = emit_store_flag_1 (target, code, tem, const0_rtx,
(gdb) pr op0
(reg:SI 1170)
(gdb) pr op1
(reg:SI 1170)
(gdb) pr target
(reg:DI 1166)

(gdb) frame 18
#18 0x102822d4 in expand_expr_real (exp=0xf786d510, target=0xf7e8e450,
tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/expr.c:7183
7183          ret = expand_expr_real_1 (exp, target, tmode, modifier, alt_rtl);
(gdb) call debug_tree(exp)
 <modify_expr 0xf786d510
    type <integer_type 0xf7c5d8c0 cpp_num_part sizes-gimplified asm_written
public unsigned DI
        size <integer_cst 0xf7fd76f0 constant 64>
        unit size <integer_cst 0xf7fd7720 constant 8>
        align 64 symtab -138067152 alias set -1 canonical type 0xf7e99540
precision 64 min <integer_cst 0xf7fd7750 0> max <integer_cst 0xf7fd76c0
18446744073709551615>
        pointer_to_this <pointer_type 0xf7b644d0>>
    side-effects
    arg 0 <ssa_name 0xf7cbd140 type <integer_type 0xf7c5d8c0 cpp_num_part>
        visited var <var_decl 0xf7f65960 lhs$low>def_stmt lhs$low_143 =
(cpp_num_part) D.9996_548;

        version 143>
    arg 1 <convert_expr 0xf7b5a0a0 type <integer_type 0xf7c5d8c0 cpp_num_part>

        arg 0 <ssa_name 0xf7a4e940 type <boolean_type 0xf7e995b0 _Bool>
            visited var <var_decl 0xf7d7f420 D.9996>def_stmt D.9996_548 =
rhs$high_890 != lhs$high_897;

            version 548>>>
(gdb) call debug_rtx(target)
(const_int 0 [0x0])


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

------- Comment #21 from bergner at gcc dot gnu dot org  2009-07-01 03:29 -------
Created an attachment (id=18104)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18104&action=view)
Tetscase for use without comment #11 patch

/home/bergner/gcc/PR40597/build/gcc-mainline-base-32/./prev-gcc/cc1
-fpreprocessed expr-ice.i -msecure-plt -quiet -dumpbase expr.c -auxbase-strip
expr.o -g -O2 -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wmissing-format-attribute -pedantic -Wno-long-long
-Werror -version -o expr.s


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #22 from bonzini at gnu dot org  2009-07-01 10:41 -------
Created an attachment (id=18106)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18106&action=view)
patch to test

This is the patch to fix the bug.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gcc dot gnu dot org]

------- Comment #23 from bonzini at gnu dot org  2009-07-01 12:06 -------
Subject: Bug 40597

Author: bonzini
Date: Wed Jul  1 12:05:56 2009
New Revision: 149137

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=149137
Log:
2009-07-01  Paolo Bonzini  <bonzini@gnu.org>

        PR bootstrap/40597
        * expmed.c (emit_store_flag): Perform a conversion if necessary,
        after reducing a DImode cstore to SImode.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/expmed.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

------- Comment #24 from bergner at gcc dot gnu dot org  2009-07-01 13:42 -------
Created an attachment (id=18107)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18107&action=view)
Yet another ICE test case

New test case for use after the commit of the patch in Comment #23.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #25 from bonzini at gnu dot org  2009-07-01 14:28 -------
Created an attachment (id=18110)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18110&action=view)
... and one more patch


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

------- Comment #26 from bergner at gcc dot gnu dot org  2009-07-01 15:32 -------
Created an attachment (id=18111)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18111&action=view)
And yet another one...

Here's another test case to use with the patch from Comment #25.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #27 from bonzini at gnu dot org  2009-07-01 16:52 -------
Created an attachment (id=18112)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18112&action=view)
... watch out, this is on top of mainline, not on top of pr40957-3.patch

(It would apply and just not work!)


-- 

bonzini at gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #18110|0                           |1
        is obsolete|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

------- Comment #28 from bergner at gcc dot gnu dot org  2009-07-01 18:35 -------
Mainline + patch from Comment #27 has passed bootstrap with a 32-bit default
build (the 64-bit default run is still running).  I'm running the testsuite now
and will compare to one of Janis' recent nightly testsuite results.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

------- Comment #29 from bergner at gcc dot gnu dot org  2009-07-01 21:05 -------
The 64-bit default build finished bootstrapping with no errors too.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

------- Comment #30 from bergner at gcc dot gnu dot org  2009-07-02 02:23 -------
Comparing the testsuite runs against the result from r149023 (the commit
previous to the cond-optab checkin), the default 32-bit testsuite run showed no
regressions.  The 64-bit default testsuite run has a few extra regressions. 
The first I looked at [FAIL: gcc.dg/20020425-1.c (test for excess errors), both
-m32 and -m64] was due to cc1 SEGV'ing.  I'll build a debug compiler and use
gdb to see where we're at.  We also have this difference:

 Running target unix/-m32
-FAIL: abi_check
+FAIL: 21_strings/basic_string/cons/char/1.cc execution test
+FAIL: 21_strings/basic_string/cons/wchar_t/1.cc execution test
+FAIL: 21_strings/basic_string/init-list.cc execution test
+FAIL: 21_strings/basic_string/insert/char/1.cc execution test
[snip lots more fails]

Does the "abi_check" failure mean we didn't even run these tests with the
"base" compiler?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bergner at gcc dot gnu dot org]

------- Comment #31 from bergner at gcc dot gnu dot org  2009-07-02 02:50 -------
I think we recursed off the stack.  This is the backtrace:

#0  0x000000001047bedc in gimple_boolify (expr=0x400005e33c0) at
/home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:2750
#1  0x000000001047e230 in gimplify_cond_expr (expr_p=0x400005e3450,
pre_p=0xfffff409e70, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:2932
#2  0x00000000104996d8 in gimplify_expr (expr_p=0x400005e3450,
pre_p=0xfffff409e70, post_p=0xfffff4093a8, 
    gimple_test_f=@0x11106140: 0x1045bacc <is_gimple_stmt>, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:6456
#3  0x000000001048d38c in gimplify_stmt (stmt_p=0x400005e3450,
seq_p=0xfffff409e70)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:5142
#4  0x0000000010480aec in gimplify_cond_expr (expr_p=0x400005e34a0,
pre_p=0xfffff40b340, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:3054
#5  0x00000000104996d8 in gimplify_expr (expr_p=0x400005e34a0,
pre_p=0xfffff40b340, post_p=0xfffff40a878, 
    gimple_test_f=@0x11106140: 0x1045bacc <is_gimple_stmt>, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:6456
#6  0x000000001048d38c in gimplify_stmt (stmt_p=0x400005e34a0,
seq_p=0xfffff40b340)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:5142
#7  0x0000000010480aec in gimplify_cond_expr (expr_p=0x400005e34f0,
pre_p=0xfffff40c810, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:3054
#8  0x00000000104996d8 in gimplify_expr (expr_p=0x400005e34f0,
pre_p=0xfffff40c810, post_p=0xfffff40bd48, 
    gimple_test_f=@0x11106140: 0x1045bacc <is_gimple_stmt>, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:6456
#9  0x000000001048d38c in gimplify_stmt (stmt_p=0x400005e34f0,
seq_p=0xfffff40c810)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:5142
#10 0x0000000010480aec in gimplify_cond_expr (expr_p=0x400005e3540,
pre_p=0xfffff40dce0, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:3054
#11 0x00000000104996d8 in gimplify_expr (expr_p=0x400005e3540,
pre_p=0xfffff40dce0, post_p=0xfffff40d218, 
    gimple_test_f=@0x11106140: 0x1045bacc <is_gimple_stmt>, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:6456
#12 0x000000001048d38c in gimplify_stmt (stmt_p=0x400005e3540,
seq_p=0xfffff40dce0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:5142
#13 0x0000000010480aec in gimplify_cond_expr (expr_p=0x400005e3590,
pre_p=0xfffff40f1b0, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:3054
#14 0x00000000104996d8 in gimplify_expr (expr_p=0x400005e3590,
pre_p=0xfffff40f1b0, post_p=0xfffff40e6e8, 
    gimple_test_f=@0x11106140: 0x1045bacc <is_gimple_stmt>, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:6456
#15 0x000000001048d38c in gimplify_stmt (stmt_p=0x400005e3590,
seq_p=0xfffff40f1b0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:5142
#16 0x0000000010480aec in gimplify_cond_expr (expr_p=0x400005e35e0,
pre_p=0xfffff410680, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:3054
#17 0x00000000104996d8 in gimplify_expr (expr_p=0x400005e35e0,
pre_p=0xfffff410680, post_p=0xfffff40fbb8, 
    gimple_test_f=@0x11106140: 0x1045bacc <is_gimple_stmt>, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:6456
#18 0x000000001048d38c in gimplify_stmt (stmt_p=0x400005e35e0,
seq_p=0xfffff410680)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:5142
#19 0x0000000010480aec in gimplify_cond_expr (expr_p=0x400005e3630,
pre_p=0xfffff411b50, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:3054
#20 0x00000000104996d8 in gimplify_expr (expr_p=0x400005e3630,
pre_p=0xfffff411b50, post_p=0xfffff411088, 
    gimple_test_f=@0x11106140: 0x1045bacc <is_gimple_stmt>, fallback=0)
    at /home/bergner/gcc/PR40597/gcc-mainline-base/gcc/gimplify.c:6456

[snip over 4000 gimplify_* frames]


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #32 from bonzini at gnu dot org  2009-07-15 06:05 -------
Yes, but I don't think it's infinite recursion.  There are 11,000 else ifs in
the testcase.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[krebbel at gcc dot gnu dot org]

------- Comment #33 from krebbel at gcc dot gnu dot org  2009-07-23 12:37 -------
Your patch from 2009-06-30 prevents the following code from being implemented
jumpless on S/390:

int a, b;
...
int x = a == b;

In emit_store_flag the following code now invokes emit_store_flag_1 instead of
emit_store_flag:
  if ((code == EQ || code == NE) && op1 != const0_rtx)
    {
      tem = expand_binop (mode, xor_optab, op0, op1, subtarget, 1,
                          OPTAB_WIDEN);

      if (tem == 0)
        tem = expand_binop (mode, sub_optab, op0, op1, subtarget, 1,
                            OPTAB_WIDEN);
      if (tem != 0)
        tem = emit_store_flag_1 (target, code, tem, const0_rtx,
                                 mode, unsignedp, normalizep, target_mode);
      if (tem != 0)
        return tem;

      delete_insns_since (last);
    }

But emit_store_flag_1 is not sufficient to implement this case jumpless since
the code emitting the abs, sub and neg instructions is only in emit_store_flag:

  if (code == EQ || code == NE)
    {
      /* For EQ or NE, one way to do the comparison is to apply an operation
         that converts the operand into a positive number if it is nonzero
         or zero if it was originally zero.  Then, for EQ, we subtract 1 and
         for NE we negate.  This puts the result in the sign bit.  Then we
         normalize with a shift, if needed.
...


-- 

krebbel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |krebbel at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[paolo dot bonzini at gmail dot com]

------- Comment #34 from paolo dot bonzini at gmail dot com  2009-07-23 22:52 -------
Subject: Re:  Powerpc bootstrap is broken due to changes
 in expmed.c

On 07/23/2009 02:37 PM, krebbel at gcc dot gnu dot org wrote:
> In emit_store_flag the following code now invokes emit_store_flag_1 instead of
> emit_store_flag:

This one in particular should be a recursive call indeed.  Can you 
prepare a patch?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[meissner at linux dot vnet dot ibm dot com]

------- Comment #35 from meissner at linux dot vnet dot ibm dot com  2009-07-23 23:00 -------
Subject: Re:  Powerpc bootstrap is broken due to changes in expmed.c

On Thu, Jul 23, 2009 at 10:52:01PM -0000, paolo dot bonzini at gmail dot com
wrote:
> 
> 
> ------- Comment #34 from paolo dot bonzini at gmail dot com  2009-07-23 22:52 -------
> Subject: Re:  Powerpc bootstrap is broken due to changes
>  in expmed.c
> 
> On 07/23/2009 02:37 PM, krebbel at gcc dot gnu dot org wrote:
> > In emit_store_flag the following code now invokes emit_store_flag_1 instead of
> > emit_store_flag:
> 
> This one in particular should be a recursive call indeed.  Can you 
> prepare a patch?
> 
> 
> -- 
> 
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597
> 
> ------- You are receiving this mail because: -------
> You reported the bug, or are watching the reporter.

Just to be sure we are on the same page, is the trunk up to date, or are there
patches to the trunk that haven't been committed yet.  It looks like the patch
was committed.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #36 from bonzini at gnu dot org  2009-07-23 23:01 -------
No, all patches were committed.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #37 from bonzini at gnu dot org  2009-12-30 10:59 -------
The bootstrap failure is fixed, please reconfirm and reopen bugs for other
failures or other targets.


-- 

bonzini at gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[bonzini at gnu dot org]

------- Comment #38 from bonzini at gnu dot org  2009-12-30 11:09 -------
Andreas, for s390-linux I get this jumpless code:

f:
        xr      %r2,%r3
        lpr     %r2,%r2
        ahi     %r2,-1
        srl     %r2,31
        br      %r14

for this testcase:

int f(int a, int b)
{
  return (a == b);
}

at -O1 or above.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597

[Bug bootstrap/40597] Powerpc bootstrap is broken due to changes in expmed.c

[krebbel at gcc dot gnu dot org]

------- Comment #39 from krebbel at gcc dot gnu dot org  2009-12-31 10:31 -------
Ok. That looks good. I think the S/390 problem from comment #33 got fixed with
that patch:
http://gcc.gnu.org/ml/gcc-patches/2009-07/msg01392.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40597