[Bug c/32258] New: Testsuite reports - FAIL: gcc.dg/torture/builtin-pow-mpfr-1.c

["rob1weld at aol dot com" <gcc-bugzilla at gcc dot gnu dot org>]

I installed http://www.mpfr.org/mpfr-current/mpfr-2.2.1.tar.bz2 and applied the
most recent patches. My version is 2.2.1-p5 .

I get this as a result of "make -i check":

FAIL: gcc.dg/torture/builtin-pow-mpfr-1.c  -O0  scan-tree-dump pow
FAIL: gcc.dg/torture/builtin-pow-mpfr-1.c  -O1  scan-tree-dump pow
FAIL: gcc.dg/torture/builtin-pow-mpfr-1.c  -O2  scan-tree-dump pow
FAIL: gcc.dg/torture/builtin-pow-mpfr-1.c  -O3 -fomit-frame-pointer 
scan-tree-dump pow
FAIL: gcc.dg/torture/builtin-pow-mpfr-1.c  -O3 -g  scan-tree-dump pow
FAIL: gcc.dg/torture/builtin-pow-mpfr-1.c  -Os  scan-tree-dump pow


Here are a couple of my results from a while ago, and recent:

Results for 4.3.0 20070601 (experimental) testsuite on i686-pc-linux-gnu
http://gcc.gnu.org/ml/gcc-testresults/2007-06/msg00073.html

Results for 4.3.0 20070521 (experimental) testsuite on i686-pc-linux-gnu
http://gcc.gnu.org/ml/gcc-testresults/2007-05/msg01083.html


Here are some other people's results - some used the --with-mpfr option:

Compiled using "--with-mpfr=/remote/atg5/jbuck/mpfr-linux" :
Results for 4.3.0 20070608 (experimental) testsuite on i686-pc-linux-gnu
http://gcc.gnu.org/ml/gcc-testresults/2007-06/msg00396.html

Results for 4.3.0 20070608 (experimental) testsuite on ia64-suse-linux-gnu
http://gcc.gnu.org/ml/gcc-testresults/2007-06/msg00391.html

Compiled using "--with-gmp=/opt/gcc-nightly/gmp-mpfr
--with-mpfr=/opt/gcc-nightly/gmp-mpfr":
Results for 4.3.0 20070608 (experimental) testsuite on
powerpc64-unknown-linux-gnu
http://gcc.gnu.org/ml/gcc-testresults/2007-06/msg00387.html


The other people don't seem to have this error occur. I have no reason to think
they are using a more recent version of mpfr - since there is none. Perhaps
they are using an older version.


Looking at the surrounding log entries (edited for similarity of test type):

Executing on host: /opt/gcc-4_3-build-2/gcc/xgcc -B/opt/gcc-4_3-build-2/gcc/
/root/downloads/gcc-4_3-trunk/gcc/testsuite/gcc.dg/torture/builtin-noret-2.c  
-Os   -fno-show-column  -lm   -o builtin-noret-2.exe    (timeout = 300)
PASS: gcc.dg/torture/builtin-noret-2.c  -Os  (test for excess errors)

Executing on host: /opt/gcc-4_3-build-2/gcc/xgcc -B/opt/gcc-4_3-build-2/gcc/
/root/downloads/gcc-4_3-trunk/gcc/testsuite/gcc.dg/torture/builtin-pow-mpfr-1.c
  -Os  -fdump-tree-original -fno-show-column -S  -o builtin-pow-mpfr-1.s   
(timeout = 300)
PASS: gcc.dg/torture/builtin-pow-mpfr-1.c  -Os  (test for excess errors)
FAIL: gcc.dg/torture/builtin-pow-mpfr-1.c  -Os  scan-tree-dump pow

Executing on host: /opt/gcc-4_3-build-2/gcc/xgcc -B/opt/gcc-4_3-build-2/gcc/
/root/downloads/gcc-4_3-trunk/gcc/testsuite/gcc.dg/torture/builtin-power-1.c  
-Os  -ffast-math -fno-show-column  -lm   -o builtin-power-1.exe    (timeout =
300)
PASS: gcc.dg/torture/builtin-power-1.c  -Os  (test for excess errors)


I notice that this one test is applied differently than the surrounding ones.
With the constant folding difficulties we are having at the moment (on
i686-pc-linux-gnu) we might want to check the folding on the other tests too.


-- 
           Summary: Testsuite reports - FAIL: gcc.dg/torture/builtin-pow-
                    mpfr-1.c
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rob1weld at aol dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32258