[Bug bootstrap/52041] New: [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[Bug bootstrap/52041] New: [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

             Bug #: 52041
           Summary: [4.7 Regression] Bootstrap failure at revision 183650
                    with --enable-checking=release
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dominiq@lps.ens.fr
                CC: iains@gcc.gnu.org, ian@gcc.gnu.org
              Host: x86_64-apple-darwin10
            Target: x86_64-apple-darwin10
             Build: x86_64-apple-darwin10


Bootstrapping revision 183650 configured with '--enable-checking=release' fails
on x86_64-apple-darwin10 with

...
Comparing stages 2 and 3
warning: gcc/cc1-checksum.o differs
warning: gcc/cc1plus-checksum.o differs
Bootstrap comparison failure!
gcc/tree-ssa-strlen.o differs
make[2]: *** [compare] Error 1
make[1]: *** [stage3-bubble] Error 2
make: *** [all] Error 2

Revision 183649 is OK:

[macbook] f90/bug% gfcp -v
Using built-in specs.
COLLECT_GCC=gfcp
COLLECT_LTO_WRAPPER=/opt/gcc/gcc4.7p/libexec/gcc/x86_64-apple-darwin10.8.0/4.7.0/lto-wrapper
Target: x86_64-apple-darwin10.8.0
Configured with: ../p_work/configure --prefix=/opt/gcc/gcc4.7p
--enable-languages=c,c++,lto,fortran --with-gmp=/opt/mp --with-system-zlib
--enable-checking=release --with-cloog=/opt/mp --enable-cloog-backend=isl
--enable-lto
Thread model: posix
gcc version 4.7.0 20120127 (experimental) [trunk revision 183649] (GCC) 

as well as 183674 without '--enable-checking=release'

[macbook] f90/bug% gfc -v
Using built-in specs.
COLLECT_GCC=gfc
COLLECT_LTO_WRAPPER=/opt/gcc/gcc4.7w/libexec/gcc/x86_64-apple-darwin10.8.0/4.7.0/lto-wrapper
Target: x86_64-apple-darwin10.8.0
Configured with: ../work/configure --prefix=/opt/gcc/gcc4.7w
--enable-languages=c,c++,fortran,objc,obj-c++,java,ada,lto --with-gmp=/opt/mp
--with-system-zlib --with-cloog=/opt/mp --enable-cloog-backend=isl --enable-lto
Thread model: posix
gcc version 4.7.0 20120129 (experimental) [trunk revision 183674p7] (GCC)

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-01-29 14:36:29 UTC ---
Created attachment 26501
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26501
Assembler for gcc/tree-ssa-strlen.c at stage 2

Assembler generated by

/opt/gcc/p_build/stage1-gcc/g++ -B/opt/gcc/p_build/stage1-gcc/
-B/opt/gcc/gcc4.7p/x86_64-apple-darwin10.8.0/bin/ -nostdinc++
-B/opt/gcc/p_build/stage1-x86_64-apple-darwin10.8.0/libstdc++-v3/src/.libs
-B/opt/gcc/p_build/stage1-x86_64-apple-darwin10.8.0/libstdc++-v3/libsupc++/.libs
-I/opt/gcc/p_build/stage1-x86_64-apple-darwin10.8.0/libstdc++-v3/include/x86_64-apple-darwin10.8.0
-I/opt/gcc/p_build/stage1-x86_64-apple-darwin10.8.0/libstdc++-v3/include
-I/opt/gcc/p_work/libstdc++-v3/libsupc++
-L/opt/gcc/p_build/stage1-x86_64-apple-darwin10.8.0/libstdc++-v3/src/.libs
-L/opt/gcc/p_build/stage1-x86_64-apple-darwin10.8.0/libstdc++-v3/libsupc++/.libs
-c -g -O2 -mdynamic-no-pic -gtoggle -DIN_GCC -fno-exceptions -fno-rtti -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror
-DHAVE_CONFIG_H -I. -I. -I../../p_work/gcc -I../../p_work/gcc/.
-I../../p_work/include -I./../stage2-intl -I../../p_work/libcpp/include
-I/opt/mp/include -I../../p_work/libdecnumber -I../../p_work/libdecnumber/dpd
-I../stage2-libdecnumber -I/opt/mp/include -DCLOOG_INT_GMP -DCLOOG_ORG
../../p_work/gcc/tree-ssa-strlen.c -save-temps

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-01-29 14:42:13 UTC ---
Created attachment 26502
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26502
bzipped assembler for gcc/tree-ssa-strlen.c at stage 3

Assembler generated by

/opt/gcc/p_build/stage2-gcc/g++ -B/opt/gcc/p_build/stage2-gcc/
-B/opt/gcc/gcc4.7p/x86_64-apple-darwin10.8.0/bin/ -nostdinc++
-B/opt/gcc/p_build/stage2-x86_64-apple-darwin10.8.0/libstdc++-v3/src/.libs
-B/opt/gcc/p_build/stage2-x86_64-apple-darwin10.8.0/libstdc++-v3/libsupc++/.libs
-I/opt/gcc/p_build/stage2-x86_64-apple-darwin10.8.0/libstdc++-v3/include/x86_64-apple-darwin10.8.0
-I/opt/gcc/p_build/stage2-x86_64-apple-darwin10.8.0/libstdc++-v3/include
-I/opt/gcc/p_work/libstdc++-v3/libsupc++
-L/opt/gcc/p_build/stage2-x86_64-apple-darwin10.8.0/libstdc++-v3/src/.libs
-L/opt/gcc/p_build/stage2-x86_64-apple-darwin10.8.0/libstdc++-v3/libsupc++/.libs
-c -g -O2 -mdynamic-no-pic -DIN_GCC -fno-exceptions -fno-rtti -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror
-DHAVE_CONFIG_H -I. -I. -I../../p_work/gcc -I../../p_work/gcc/.
-I../../p_work/include -I./../stage3-intl -I../../p_work/libcpp/include
-I/opt/mp/include -I../../p_work/libdecnumber -I../../p_work/libdecnumber/dpd
-I../stage3-libdecnumber -I/opt/mp/include -DCLOOG_INT_GMP -DCLOOG_ORG
../../p_work/gcc/tree-ssa-strlen.c -save-temps

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-01-29 14:44:55 UTC ---
Created attachment 26503
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26503
bzipped preprocessed file for gcc/tree-ssa-strlen.c at stage 3

AFAICT the only differences between stage 2 and 3 are the obvious replacements
of stage2 with stage1 and stage3 with stage2.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.0

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-30 09:27:16 UTC ---
Dup of PR51974?

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> 2012-01-30 13:47:06 UTC ---
I just bootstrapped r183695 (incl. Ada and Obj-C++) with
--enable-checking=release  on i686-darwin9, using gcc4.6 as the bootstrap
compiler.  What bootstrap compiler where you using?

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-01-30 14:16:37 UTC ---
> I just bootstrapped r183695 (incl. Ada and Obj-C++) with
> --enable-checking=release  on i686-darwin9, using gcc4.6 as the bootstrap
> compiler.  What bootstrap compiler where you using?

[macbook] gcc/p_build% gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/opt/gcc/gcc4.7a/libexec/gcc/x86_64-apple-darwin10.8.0/4.7.0/lto-wrapper
Target: x86_64-apple-darwin10.8.0
Configured with: ../_clean/configure --prefix=/opt/gcc/gcc4.7a
--enable-languages=c,c++,fortran,ada,lto --with-gmp=/opt/mp --with-system-zlib
--enable-checking=release --with-cloog=/opt/mp --enable-cloog-backend=isl
--enable-lto
Thread model: posix
gcc version 4.7.0 20120117 (experimental) [trunk revision 183234] (GCC) 

Note that a clean bootstrap succeeded for revisions (above 183000) 183001,
183306, 183526 (patched), 183618, 183649, **183707**, and **183719**, but not
for revisions 183650 and 183669.
So it seems that bootstrap is back again due to some change between revision
183669 and 183695 (mostly gfortran, testsuite, ada, ... , but for r183684).

> I can reproduce random comparison failures as well, even with checking enabled,
> on openSUSE Factory x86_64.  I wasn't yet able to reproduce them locally
> though.
> I'm trying again.

Richard, what are "random comparison failures" (from PR51974)? Do the above
qualify?

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

Iain Sandoe <iains at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-01-30
     Ever Confirmed|0                           |1

--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> 2012-01-30 15:35:39 UTC ---
@r183725 x86-64-darwin10, I see a compare fail on tree-ssa-strlen.o

There seem to be real code differences doing a dissassembler dump of the
stripped binaries; will try and narrow down the significant.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-01-30 15:44:27 UTC ---
> @r183725 x86-64-darwin10, I see a compare fail on tree-ssa-strlen.o

It just finished to bootstrap for me with '--enable-checking=release':

[macbook] f90/bug% gfcp -v
Using built-in specs.
COLLECT_GCC=gfcp
COLLECT_LTO_WRAPPER=/opt/gcc/gcc4.7p/libexec/gcc/x86_64-apple-darwin10.8.0/4.7.0/lto-wrapper
Target: x86_64-apple-darwin10.8.0
Configured with: ../p_work/configure --prefix=/opt/gcc/gcc4.7p
--enable-languages=c,c++,lto,fortran --with-gmp=/opt/mp --with-system-zlib
--enable-checking=release --with-cloog=/opt/mp --enable-cloog-backend=isl
--enable-lto
Thread model: posix
gcc version 4.7.0 20120130 (experimental) [trunk revision 183725] (GCC)

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-30 16:16:48 UTC ---
Is it -g vs. -g0 related?  I.e. if you recompile tree-ssa-strlen.i with stage1 
and stage2 cc1 with the same options, does it yield the same assembly?  If not,
stage2 might be miscompiled or similar issue, if yes, does compiling
tree-ssa-strlen.i with -fcompare-debug (in addition to the standard options)
yield a failure?  If it is not -g vs. -g0, you could try -fdump-tree-all with
both compilers and compare where the first difference appears.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #10 from Iain Sandoe <iains at gcc dot gnu.org> 2012-01-30 18:22:12 UTC ---
the stage3 tree-ssa-strlen.o fails with -fcompare-debug "failure (length)".

An incomplete analysis ... run out of time...

The first mismatched tree dump is 18t.ssa -- with differences like 
# DEBUG x => y 

but also there are some differences in temporary var numbers.

====

Looking at the asm, there seem to be differences  like

+ movl  al,%eax
  cmp $xxx, %eax

and cltq in stage2 missing in stage 3 -- so size changing instructions.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-30 19:26:10 UTC ---
The addition of # DEBUG lines in the dumps as well as some changes in D.NNNN
numbers are expected and correct in between the dumps, but the SSA_NAME
versions (_VV parts) as well as the stmt kinds, number of operands, number and
order of basic blocks etc. should be the same.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-30 19:36:33 UTC ---
Can't reproduce the -fcompare-debug failure with a cross from x86_64-linux to
x86_64-darwin on the provided tree-ssa-strlen.i btw., though of course the
configuration of the compiler could be different.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #13 from Iain Sandoe <iains at gcc dot gnu.org> 2012-01-30 20:31:11 UTC ---
OK. I've been using the command lines from my build log, with modification to
the path to account for the stage2/stage3 ... so like

in stage2-gcc/
../stage1-gcc/g++ ....

in stage3-gcc/
../stage3-gcc/g++ ....

====

The problem is that there are so many differences between the files, that even
with diff or side-by-side file displays it's hard to see which differences are
significant.

When I look at the 149t.optimized tree dump, and assuming that changes in
D.xxxx and # DEBUG are not significant, I don't really see anything that looks
problematical - so either  the problem is rtl side or I need to narrow down
what I'm looking for,

====
back to the asm to try and narrow things down:

there seem to be two mis-matched cases:

1. where a var is being used in a sequence of compare & jump (I'd assume a
switch),  I the case of stage2 the asm has

   movzbl al, %eax
   cmp $xxx, %eax
   jxxxx

in the case of stage3 , the movzbl is missing.

2. an indexed lookup from gss_for_code:

  in the case of stage2 there is:

  ..set up rdx
  cltq
  movslq (%rda, %rax,4), %rdx

the (cltq) extension of reg A is missing for stage 3.

both look like sign extension-ish issues.

I think maybe will have to look at some rtl :(

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #14 from Iain Sandoe <iains at gcc dot gnu.org> 2012-01-30 20:34:08 UTC ---
(In reply to comment #13)
> OK. I've been using the command lines from my build log, with modification to
> the path to account for the stage2/stage3 ... so like

> in stage3-gcc/
> ../stage3-gcc/g++ ...
typo 
../stage2-gcc/g++ ... of course.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-30 21:07:57 UTC ---
Can you please mail me (or upload somewhere) all the RTL logs from
compilation with -fcompare-debug and -fdump-tree-optimized (both the non-gk and
gk dumps)?

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #16 from Iain Sandoe <iains at gcc dot gnu.org> 2012-01-30 21:24:07 UTC ---
(In reply to comment #15)
> Can you please mail me (or upload somewhere) all the RTL logs from
> compilation with -fcompare-debug and -fdump-tree-optimized (both the non-gk and
> gk dumps)?

will do tomorrow - a the moment, I think scratch the comments above, 
... the stage3 output is not repeatable (c.f. the bootstrap ouput) using the
command lines as I described (I guess because of the differences in the paths).

However, the differences seem to be more than just strings - so I need to try
and understand what's happening there.

[the stage2 output *is* repeatable with ../stage1-gcc/g++ ... ]

===

I will repeat the experiment tomorrow using the stage2 .ii file .. out of time
for today.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-30 22:12:24 UTC ---
Created attachment 26521
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26521
X449

The cross-compiler under valgrind actually shows some errors, I'm attaching
fixes for both of the sources of the failures.

This one has been introduced probably by the PR51667 changes, for object
vectors storing somewhere else the pointers returned by VEC_safe_push is a bad
idea, as any times a new element is pushed into the vector, the vector may have
been reallocated, making all the pointers into it invalid.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-30 22:13:44 UTC ---
Created attachment 26522
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26522
X450

And ipa-prop doesn't seem to initialize ao.volatile_p.  I think it is a bad
idea not to call ao_ref_init, otherwise next time some further field is added,
we'll hit this bug again.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #19 from Iain Sandoe <iains at gcc dot gnu.org> 2012-01-31 08:06:38 UTC ---
x86-64-darwin10 @ r183725 bootstrapped with comment #17 & #18 applied (and
fails repeatably without).

testing under way - do you want any more/different analysis?

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-31 08:41:53 UTC ---
Author: jakub
Date: Tue Jan 31 08:41:46 2012
New Revision: 183751

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183751
Log:
    PR bootstrap/52041
    PR bootstrap/52039
    PR target/51974
    * ree.c (add_removable_extension): Change def_map argument
    to unsigned *, store in def_map 1 + offset into *insn_list vector
    instead of pointers into the vector.
    (find_removable_extensions): Adjust caller.

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

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #21 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-31 09:53:42 UTC ---
(In reply to comment #18)
> Created attachment 26522 [details]
> X450
> 
> And ipa-prop doesn't seem to initialize ao.volatile_p.  I think it is a bad
> idea not to call ao_ref_init, otherwise next time some further field is added,
> we'll hit this bug again.

That patch is ok.  We should indeed always call ao_ref_init (maybe I
should move it to some place inlinable).

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #23 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-31 10:07:25 UTC ---
Fixed.

[Bug bootstrap/52041] [4.7 Regression] Bootstrap failure at revision 183650 with --enable-checking=release

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52041

--- Comment #22 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-31 10:06:55 UTC ---
Author: jakub
Date: Tue Jan 31 10:06:50 2012
New Revision: 183753

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183753
Log:
    PR bootstrap/52041
    PR bootstrap/52039
    PR target/51974
    * ipa-prop.c (detect_type_change_1): Call ao_ref_init.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ipa-prop.c