[Bug c/39903] New: ICE in tmpdir-gcc.dg-struct-layout-1/t026 c_compat_(x,y)_tst.o compile at -m64

[Bug c/39903] New: ICE in tmpdir-gcc.dg-struct-layout-1/t026 c_compat_(x,y)_tst.o compile at -m64

[howarth at nitro dot med dot uc dot edu]

The tmpdir-gcc.dg-struct-layout-1/t026 c_compat_x_tst.o compile and
tmpdir-gcc.dg-struct-layout-1/t026 c_compat_y_tst.o compile test on
x86_64-apple-darwin10 produces internal compiler errors of the form...

Executing on host: /sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/xgcc
-B/sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/  -w
-I/sw/src/fink.build/gcc44-4.4.0-1000/gcc-4.4.0/gcc/testsuite/gcc.dg/compat
-mno-mmx -fno-common -Wno-abi -DSKIP_DECIMAL_FLOAT -DSKIP_DECIMAL_FLOAT -c  -o
c_compat_x_tst.o
/sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/testsuite/gcc/gcc.dg-struct-layout-1//t026_x.c
   (timeout = 300)
In file included from
/sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/testsuite/gcc/gcc.dg-struct-layout-1//t026_x.c:9:
/sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/testsuite/gcc/gcc.dg-struct-layout-1//t026_test.h:
In function 'test2456':
/sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/testsuite/gcc/gcc.dg-struct-layout-1//t026_test.h:57:
internal compiler error: in emit_move_insn, at expr.c:3405

and 

Executing on host: /sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/xgcc
-B/sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/  -w
-I/sw/src/fink.build/gcc44-4.4.0-1000/gcc-4.4.0/gcc/testsuite/gcc.dg/compat
-mno-mmx -fno-common -Wno-abi -DSKIP_DECIMAL_FLOAT -DSKIP_DECIMAL_FLOAT -c  -o
c_compat_y_tst.o
/sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/testsuite/gcc/gcc.dg-struct-layout-1//t026_y.c
   (timeout = 300)
In file included from
/sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/testsuite/gcc/gcc.dg-struct-layout-1//t026_y.c:9:
/sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/testsuite/gcc/gcc.dg-struct-layout-1//t026_test.h:
In function 'check2456':
/sw/src/fink.build/gcc44-4.4.0-1000/darwin_objdir/gcc/testsuite/gcc/gcc.dg-struct-layout-1//t026_test.h:57:
internal compiler error: in emit_move_insn, at expr.c:3405

This error is triggered by only a single line in t026_test.h....

T(2456,double a;struct{int * c;}b[];,F(2456,a,-85022.609375,131929.593750))

I am attaching preprocessed source and assembly for each test in the hope that
this can be reproduced on a cross-compiler for this target.


-- 
           Summary: ICE in tmpdir-gcc.dg-struct-layout-1/t026
                    c_compat_(x,y)_tst.o compile at -m64
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: howarth at nitro dot med dot uc dot edu
 GCC build triplet: x86_64-apple-darwin10
  GCC host triplet: x86_64-apple-darwin10
GCC target triplet: x86_64-apple-darwin10


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] ICE in tmpdir-gcc.dg-struct-layout-1/t026 c_compat_(x,y)_tst.o compile at -m64

[howarth at nitro dot med dot uc dot edu]

------- Comment #1 from howarth at nitro dot med dot uc dot edu  2009-04-25 23:38 -------
Created an attachment (id=17694)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17694&action=view)
preprocessed source for t026_x.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] ICE in tmpdir-gcc.dg-struct-layout-1/t026 c_compat_(x,y)_tst.o compile at -m64

[howarth at nitro dot med dot uc dot edu]

------- Comment #2 from howarth at nitro dot med dot uc dot edu  2009-04-25 23:38 -------
Created an attachment (id=17695)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17695&action=view)
assembly code generated from t026_x.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] ICE in tmpdir-gcc.dg-struct-layout-1/t026 c_compat_(x,y)_tst.o compile at -m64

[howarth at nitro dot med dot uc dot edu]

------- Comment #3 from howarth at nitro dot med dot uc dot edu  2009-04-25 23:39 -------
Created an attachment (id=17696)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17696&action=view)
preprocessed source for t026_y.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] ICE in tmpdir-gcc.dg-struct-layout-1/t026 c_compat_(x,y)_tst.o compile at -m64

[howarth at nitro dot med dot uc dot edu]

------- Comment #4 from howarth at nitro dot med dot uc dot edu  2009-04-25 23:40 -------
Created an attachment (id=17697)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17697&action=view)
assembly code generated from t026_y.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] ICE in tmpdir-gcc.dg-struct-layout-1/t026 c_compat_(x,y)_tst.o compile at -m64

[howarth at nitro dot med dot uc dot edu]

------- Comment #5 from howarth at nitro dot med dot uc dot edu  2009-04-26 01:35 -------
I forgot to add that the compiler is built as...

Using built-in specs.
Target: x86_64-apple-darwin10
Configured with: ../gcc-4.4.0/configure --prefix=/sw --prefix=/sw/lib/gcc4.4
--mandir=/sw/share/man --infodir=/sw/share/info
--enable-languages=c,c++,fortran,objc,java --with-gmp=/sw
--with-libiconv-prefix=/sw --with-ppl=/sw --with-cloog=/sw --with-system-zlib
--x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib
--disable-libjava-multilib --build=x86_64-apple-darwin10
--host=x86_64-apple-darwin10 --target=x86_64-apple-darwin10
Thread model: posix
gcc version 4.4.0 (GCC) 

The issue isn't seen with the i686-apple-darwin9 target using -m64 so it seems
to be specific to the 64-bit native compiler when generating 64-bit code.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] ICE in tmpdir-gcc.dg-struct-layout-1/t026 c_compat_(x,y)_tst.o compile at -m64

[ubizjak at gmail dot com]

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------- Comment #6 from ubizjak at gmail dot com  2009-04-26 07:20 -------
Confirmed on x86_64-linux, reduced testcase:

--cut here--
struct S2456
{
  double a;
  struct {} b[];
};

struct S2456 s2456;

extern void check2456va (struct S2456);

void test2456 (void)
{
  check2456va (s2456);
}
--cut here--

gcc t.c

t.c: In function ‘test2456’:
t.c:13: note: The ABI of passing struct with a flexible array member has
changed in GCC 4.4
t.c:13: internal compiler error: in emit_move_insn, at expr.c:3386
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-04-26 07:20:29
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] [4.4/4.5 Regression] ICE on flexible member

[hjl dot tools at gmail dot com]

------- Comment #7 from hjl dot tools at gmail dot com  2009-04-26 21:48 -------
A patch is posted at

http://gcc.gnu.org/ml/gcc-patches/2009-04/msg02070.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2009-
                   |                            |04/msg02070.html
            Summary|[4.4/4.5 Regression] ICE in |[4.4/4.5 Regression] ICE on
                   |tmpdir-gcc.dg-struct-layout-|flexible member
                   |1/t026 c_compat_(x,y)_tst.o |
                   |compile at -m64             |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] [4.4/4.5 Regression] ICE on flexible member

[hjl dot tools at gmail dot com]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
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------- Comment #8 from hjl dot tools at gmail dot com  2009-04-26 21:52 -------
(In reply to comment #6)
> Confirmed on x86_64-linux, reduced testcase:
> 
> --cut here--
> struct S2456
> {
>   double a;
>   struct {} b[];
> };
> 
> struct S2456 s2456;
> 
> extern void check2456va (struct S2456);
> 
> void test2456 (void)
> {
>   check2456va (s2456);
> }
> --cut here--
> 
> gcc t.c
> 
> t.c: In function ‘test2456’:
> t.c:13: note: The ABI of passing struct with a flexible array member has
> changed in GCC 4.4
> t.c:13: internal compiler error: in emit_move_insn, at expr.c:3386
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <http://gcc.gnu.org/bugs.html> for instructions.
> 

I am very curious why I didn't see original testsuite failure on
Linux/Intel64.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] [4.4/4.5 Regression] ICE on flexible member

[howarth at nitro dot med dot uc dot edu]

------- Comment #9 from howarth at nitro dot med dot uc dot edu  2009-04-26 22:17 -------
Is this one of those bugs that only trigger on -fPIC?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] [4.4/4.5 Regression] ICE on flexible member

[hjl dot tools at gmail dot com]

------- Comment #10 from hjl dot tools at gmail dot com  2009-04-26 23:08 -------
(In reply to comment #9)
> Is this one of those bugs that only trigger on -fPIC?
> 

I don't think so.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] [4.4/4.5 Regression] ICE on flexible member

[howarth at nitro dot med dot uc dot edu]

------- Comment #11 from howarth at nitro dot med dot uc dot edu  2009-04-27 00:31 -------
I can confirm that using the current gcc 4.4 branch and the proposed patch
at...

http://gcc.gnu.org/ml/gcc-patches/2009-04/msg02070.html

...that the test suite failure is eliminated on x86_64-apple-darwin10.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] [4.4/4.5 Regression] ICE on flexible member

[hjl at gcc dot gnu dot org]

------- Comment #12 from hjl at gcc dot gnu dot org  2009-04-27 14:02 -------
Subject: Bug 39903

Author: hjl
Date: Mon Apr 27 14:02:09 2009
New Revision: 146842

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=146842
Log:
gcc/

2009-04-27  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/39903
        * config/i386/i386.c (construct_container): Don't call
        gen_reg_or_parallel with BLKmode on X86_64_SSE_CLASS,
        X86_64_SSESF_CLASS and X86_64_SSEDF_CLASS.

gcc/testsuite/

2009-04-27  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/39903
        * gcc.dg/torture/pr39903-1.c: New.
        * gcc.dg/torture/pr39903-2.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr39903-1.c
    trunk/gcc/testsuite/gcc.dg/torture/pr39903-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] [4.4 Regression] ICE on flexible member

[hjl at gcc dot gnu dot org]

------- Comment #13 from hjl at gcc dot gnu dot org  2009-04-28 14:35 -------
Subject: Bug 39903

Author: hjl
Date: Tue Apr 28 14:35:12 2009
New Revision: 146895

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=146895
Log:
gcc/

2009-04-28  H.J. Lu  <hongjiu.lu@intel.com>

        Backport from mainline:
        2009-04-27  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/39903
        * config/i386/i386.c (construct_container): Don't call
        gen_reg_or_parallel with BLKmode on X86_64_SSE_CLASS,
        X86_64_SSESF_CLASS and X86_64_SSEDF_CLASS.

gcc/testsuite/

2009-04-28  H.J. Lu  <hongjiu.lu@intel.com>

        Backport from mainline:
        2009-04-27  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/39903
        * gcc.dg/torture/pr39903-1.c: New.
        * gcc.dg/torture/pr39903-2.c: Likewise.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/torture/pr39903-1.c
      - copied unchanged from r146894,
trunk/gcc/testsuite/gcc.dg/torture/pr39903-1.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/torture/pr39903-2.c
      - copied unchanged from r146894,
trunk/gcc/testsuite/gcc.dg/torture/pr39903-2.c
Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/config/i386/i386.c
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] [4.4 Regression] ICE on flexible member

[hjl dot tools at gmail dot com]

------- Comment #14 from hjl dot tools at gmail dot com  2009-04-28 14:36 -------
Fixed.


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.4.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903

[Bug c/39903] [4.4 Regression] ICE on flexible member

[hjl dot tools at gmail dot com]

------- Comment #15 from hjl dot tools at gmail dot com  2009-04-28 20:04 -------
(In reply to comment #10)
> (In reply to comment #9)
> > Is this one of those bugs that only trigger on -fPIC?
> > 

I opened PR 39952 for this.


-- 

hjl dot tools at gmail dot com changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39903