[Bug debug/41236] New: [4.5 regression] RTL checking failure compiling libgcc

[Bug debug/41236] New: [4.5 regression] RTL checking failure compiling libgcc

[ebotcazou at gcc dot gnu dot org]

At revision 151371 I get an RTL checking failure compiling libgcc:

/home/eric/build/gcc/native32/./gcc/xgcc -B/home/eric/build/gcc/native32/./gcc/
-B/home/eric/install/gcc/i586-suse-linux/bin/
-B/home/eric/install/gcc/i586-suse-linux/lib/ -isystem
/home/eric/install/gcc/i586-suse-linux/include -isystem
/home/eric/install/gcc/i586-suse-linux/sys-include    -g -O2 -O2  -g -O2
-DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition  -isystem ./include  -fPIC -g
-DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED   -I. -I.
-I../.././gcc -I/home/eric/svn/gcc/libgcc -I/home/eric/svn/gcc/libgcc/.
-I/home/eric/svn/gcc/libgcc/../gcc -I/home/eric/svn/gcc/libgcc/../include
-I/home/eric/svn/gcc/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT
-DHAVE_CC_TLS -DUSE_TLS -Wno-missing-prototypes -Wno-type-limits -o unordtf2.o
-MT unordtf2.o -MD -MP -MF unordtf2.dep -fexceptions -c
/home/eric/svn/gcc/libgcc/../gcc/config/soft-fp/unordtf2.c -fvisibility=hidden
-DHIDE_EXPORTS
/home/eric/svn/gcc/libgcc/../gcc/config/soft-fp/unordtf2.c: In function
'__unordtf2':
/home/eric/svn/gcc/libgcc/../gcc/config/soft-fp/unordtf2.c:45:1: internal
compiler error: RTL check: expected code 'subreg', have 'sign_extend' in
loc_descriptor, at dwarf2out.c:11681
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[3]: *** [unordtf2.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory
`/home/eric/build/gcc/native32/i586-suse-linux/libgcc'
make[2]: *** [all-stage1-target-libgcc] Error 2
make[2]: Leaving directory `/home/eric/build/gcc/native32'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/eric/build/gcc/native32'
make: *** [all] Error 2

All was working fine yesterday so it's very likely the enabling of VTA.


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           Summary: [4.5 regression] RTL checking failure compiling libgcc
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ebotcazou at gcc dot gnu dot org
 GCC build triplet: ix86-*-linux
  GCC host triplet: ix86-*-linux
GCC target triplet: ix86-*-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41236

[Bug debug/41236] [4.5 regression] RTL checking failure compiling libgcc

[ebotcazou at gcc dot gnu dot org]

------- Comment #1 from ebotcazou at gcc dot gnu dot org  2009-09-03 08:14 -------
Created an attachment (id=18470)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18470&action=view)
Reduced testcase.

To be compiled at -O -g with an --enable-checking=yes,rtl compiler.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41236

[Bug debug/41236] [4.5 regression] RTL checking failure compiling libgcc

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aoliva at gcc dot gnu dot
                   |                            |org
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41236

[Bug debug/41236] [4.5 regression] RTL checking failure compiling libgcc

[jakub at gcc dot gnu dot org]

------- Comment #2 from jakub at gcc dot gnu dot org  2009-09-03 13:06 -------
Created an attachment (id=18474)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18474&action=view)
gcc45-pr41236.patch

Either this, or just using XEXP (rtl, 0) instead of SUBREG_REG (rtl).  This is
only RTL checking problem, without RTL checking it will work just fine.

Doing full --enable-checking=yes,rtl bootstrap now.


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jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41236

[Bug debug/41236] [4.5 regression] RTL checking failure compiling libgcc

[jakub at gcc dot gnu dot org]

------- Comment #3 from jakub at gcc dot gnu dot org  2009-09-03 13:35 -------
That still assumes that inside of SIGN_EXTEND/ZERO_EXTEND is a REG, which isn't
always the case.  Testing with loc_descriptor call there instead now.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41236

[Bug debug/41236] [4.5 regression] RTL checking failure compiling libgcc

[jakub at gcc dot gnu dot org]

------- Comment #4 from jakub at gcc dot gnu dot org  2009-09-03 16:33 -------
Subject: Bug 41236

Author: jakub
Date: Thu Sep  3 16:33:27 2009
New Revision: 151385

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=151385
Log:
        PR debug/41236
        * dwarf2out.c (loc_descriptor): Don't use SUBREG_REG macro on
        SIGN_EXTEND or ZERO_EXTEND.  Don't assume there is a REG inside of
        it or SUBREG.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2out.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41236

[Bug debug/41236] [4.5 regression] RTL checking failure compiling libgcc

[jakub at gcc dot gnu dot org]

------- Comment #5 from jakub at gcc dot gnu dot org  2009-09-03 16:36 -------
Fixed.


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jakub at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41236