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* [Bug rtl-optimization/59649] New: [4.9 regression] conftest.c miscompiled
@ 2013-12-31 11:27 schwab@linux-m68k.org
  2013-12-31 13:24 ` [Bug rtl-optimization/59649] " schwab@linux-m68k.org
                   ` (8 more replies)
  0 siblings, 9 replies; 10+ messages in thread
From: schwab@linux-m68k.org @ 2013-12-31 11:27 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59649

            Bug ID: 59649
           Summary: [4.9 regression] conftest.c miscompiled
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: build, wrong-code
          Severity: critical
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: nickc at gcc dot gnu.org
            Blocks: 59613
            Target: ia64-*-*

>From ia64-suse-linux/libgomp/config.log:

configure:16188:  /usr/local/gcc/test/Build/./gcc/xgcc
-B/usr/local/gcc/test/Build/./gcc/ -B/usr/ia64-suse-linux/bin/
-B/usr/ia64-suse-linux/lib/ -isystem /usr/ia64-suse-linux/include -isystem
/usr/ia64-suse-linux/sys-include    -o conftest -g -O2 -include confdefs.h
-include ../../../libgomp/config/linux/omp-lock.h   conftest.c -lrt  >&5
configure:16188: $? = 0
configure:16188: ./conftest
configure:16188: $? = 1
configure: program exited with status 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "GNU OpenMP Runtime Library"
| #define PACKAGE_TARNAME "libgomp"
| #define PACKAGE_VERSION "1.0"
| #define PACKAGE_STRING "GNU OpenMP Runtime Library 1.0"
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE_URL "http://www.gnu.org/software/libgomp/"
| #define PACKAGE "libgomp"
| #define VERSION "1.0"
| #define HAVE_SYS_TYPES_H 1
| #define HAVE_SYS_STAT_H 1
| #define HAVE_STDLIB_H 1
| #define HAVE_STRING_H 1
| #define HAVE_MEMORY_H 1
| #define HAVE_STRINGS_H 1
| #define HAVE_INTTYPES_H 1
| #define HAVE_STDINT_H 1
| #define HAVE_UNISTD_H 1
| #define HAVE_DLFCN_H 1
| #define LT_OBJDIR ".libs/"
| #define TIME_WITH_SYS_TIME 1
| #define STRING_WITH_STRINGS 1
| #define HAVE_UNISTD_H 1
| #define HAVE_SEMAPHORE_H 1
| #define HAVE_SYS_TIME_H 1
| #define HAVE_SYS_TIME_H 1
| #define HAVE_GETLOADAVG 1
| #define HAVE_STRTOULL 1
| #define HAVE_PTHREAD_AFFINITY_NP 1
| #define HAVE_CLOCK_GETTIME 1
| #define HAVE_TLS 1
| #define HAVE_ATTRIBUTE_VISIBILITY 1
| #define HAVE_ATTRIBUTE_ALIAS 1
| #define HAVE_AS_SYMVER_DIRECTIVE 1
| #define HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT 1
| #define LIBGOMP_GNU_SYMBOL_VERSIONING 1
| #define HAVE_SYNC_BUILTINS 1
| /* end confdefs.h.  */
| 
| static long int longval () { return sizeof (omp_lock_t); }
| static unsigned long int ulongval () { return sizeof (omp_lock_t); }
| #include <stdio.h>
| #include <stdlib.h>
| int
| main ()
| {
| 
|   FILE *f = fopen ("conftest.val", "w");
|   if (! f)
|     return 1;
|   if ((sizeof (omp_lock_t)) < 0)
|     {
|       long int i = longval ();
|       if (i != (sizeof (omp_lock_t)))
|       return 1;
|       fprintf (f, "%ld", i);
|     }
|   else
|     {
|       unsigned long int i = ulongval ();
|       if (i != (sizeof (omp_lock_t)))
|       return 1;
|       fprintf (f, "%lu", i);
|     }
|   /* Do not output a trailing newline, as this causes \r\n confusion
|      on some platforms.  */
|   return ferror (f) || fclose (f) != 0;
| 
|   ;
|   return 0;
| }
configure:16191: error: unsupported system, cannot find sizeof (omp_lock_t)

The test program is miscompiled to always return 1.

(gdb) disass main
Dump of assembler code for function main:
   0x4000000000000600 <+0>:     [MMB]       alloc r34=ar.pfs,7,4,0
   0x4000000000000601 <+1>:                 addl r37=288,r1
   0x4000000000000602 <+2>:                 nop.b 0x0
   0x4000000000000610 <+16>:    [MII]       addl r36=280,r1
   0x4000000000000611 <+17>:                mov r33=b0
   0x4000000000000612 <+18>:                mov r35=r1;;
   0x4000000000000620 <+32>:    [MMI]       nop.m 0x0
   0x4000000000000621 <+33>:                ld8 r37=[r37]
   0x4000000000000622 <+34>:                nop.i 0x0
   0x4000000000000630 <+48>:    [MMB]       ld8 r36=[r36]
   0x4000000000000631 <+49>:                nop.m 0x0
   0x4000000000000632 <+50>:                br.call.sptk.many
b0=0x4000000000000540;;
   0x4000000000000640 <+64>:    [MMI]       mov r1=r35
   0x4000000000000641 <+65>:                nop.m 0x0
   0x4000000000000642 <+66>:                mov r32=r8
   0x4000000000000650 <+80>:    [MII]       mov r38=4
   0x4000000000000651 <+81>:                mov r36=r8;;
   0x4000000000000652 <+82>:                addl r37=296,r1;;
   0x4000000000000660 <+96>:    [MIB]       ld8 r37=[r37]
   0x4000000000000661 <+97>:                nop.i 0x0
   0x4000000000000662 <+98>:                br.call.sptk.many
b0=0x40000000000005c0;;
   0x4000000000000670 <+112>:   [MIB]       mov r1=r35
   0x4000000000000671 <+113>:               mov r36=r32
   0x4000000000000672 <+114>:               br.call.sptk.many
b0=0x4000000000000560;;
   0x4000000000000680 <+128>:   [MMI]       mov r8=1
   0x4000000000000681 <+129>:               mov r1=r35
   0x4000000000000682 <+130>:               mov.i ar.pfs=r34;;
   0x4000000000000690 <+144>:   [MIB]       nop.m 0x0
   0x4000000000000691 <+145>:               mov b0=r33
   0x4000000000000692 <+146>:               br.ret.sptk.many b0;;


^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2014-01-08 10:02 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-12-31 11:27 [Bug rtl-optimization/59649] New: [4.9 regression] conftest.c miscompiled schwab@linux-m68k.org
2013-12-31 13:24 ` [Bug rtl-optimization/59649] " schwab@linux-m68k.org
2014-01-02 14:52 ` ebotcazou at gcc dot gnu.org
2014-01-06  9:39 ` jakub at gcc dot gnu.org
2014-01-06  9:59 ` ebotcazou at gcc dot gnu.org
2014-01-07 18:05 ` jakub at gcc dot gnu.org
2014-01-07 19:17 ` jakub at gcc dot gnu.org
2014-01-07 23:05 ` ebotcazou at gcc dot gnu.org
2014-01-08 10:01 ` [Bug rtl-optimization/59649] [4.9 regression] BImode miscompiled jakub at gcc dot gnu.org
2014-01-08 10:02 ` jakub at gcc dot gnu.org

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