[Bug regression/55168] New: [4.8 Regression]: gcc.c-torture/compile/pr44119.c ICE, all but -O0

["hp at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55168

             Bug #: 55168
           Summary: [4.8 Regression]: gcc.c-torture/compile/pr44119.c ICE,
                    all but -O0
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: regression
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hp@gcc.gnu.org
                CC: steven@gcc.gnu.org
              Host: x86_64-unknown-linux-gnu
            Target: cris-axis-elf


This test previously passed, now it fails.
A patch in the revision range (last_known_working:first_known_failing)
193042:193049
exposed or caused this regression.  Since then it fails as follows:

Running
/tmp/hpautotest-gcc0/gcc/gcc/testsuite/gcc.c-torture/compile/compile.exp ...
FAIL: gcc.c-torture/compile/pr44119.c  -O1  (internal compiler error)
FAIL: gcc.c-torture/compile/pr44119.c  -O1  (test for excess errors)
FAIL: gcc.c-torture/compile/pr44119.c  -O2  (internal compiler error)
FAIL: gcc.c-torture/compile/pr44119.c  -O2  (test for excess errors)
FAIL: gcc.c-torture/compile/pr44119.c  -O3 -fomit-frame-pointer  (internal
compiler error)
FAIL: gcc.c-torture/compile/pr44119.c  -O3 -fomit-frame-pointer  (test for
excess errors)
FAIL: gcc.c-torture/compile/pr44119.c  -O3 -fomit-frame-pointer -funroll-loops 
(internal compiler error)
FAIL: gcc.c-torture/compile/pr44119.c  -O3 -fomit-frame-pointer -funroll-loops 
(test for excess errors)
FAIL: gcc.c-torture/compile/pr44119.c  -O3 -fomit-frame-pointer
-funroll-all-loops -finline-functions  (internal compiler error)
FAIL: gcc.c-torture/compile/pr44119.c  -O3 -fomit-frame-pointer
-funroll-all-loops -finline-functions  (test for excess errors)
FAIL: gcc.c-torture/compile/pr44119.c  -O3 -g  (internal compiler error)
FAIL: gcc.c-torture/compile/pr44119.c  -O3 -g  (test for excess errors)
FAIL: gcc.c-torture/compile/pr44119.c  -Os  (internal compiler error)
FAIL: gcc.c-torture/compile/pr44119.c  -Os  (test for excess errors)
FAIL: gcc.c-torture/compile/pr44119.c  -O2 -flto -fno-use-linker-plugin
-flto-partition=none  (internal compiler error)
FAIL: gcc.c-torture/compile/pr44119.c  -O2 -flto -fno-use-linker-plugin
-flto-partition=none  (test for excess errors)
FAIL: gcc.c-torture/compile/pr44119.c  -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects  (internal compiler error)
FAIL: gcc.c-torture/compile/pr44119.c  -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects  (test for excess errors)

The messages in gcc.log are similar:

Executing on host: /tmp/hpautotest-gcc0/cris-elf/gccobj/gcc/xgcc
-B/tmp/hpautotest-gcc0/cris-elf/gccobj/gcc/  -fno-diagnostics-show-caret   -O1 
-w -c   -isystem
/tmp/hpautotest-gcc0/cris-elf/gccobj/cris-elf/./newlib/targ-include -isystem
/tmp/hpautotest-gcc0/gcc/newlib/libc/include  -o pr44119.o
/tmp/hpautotest-gcc0/gcc/gcc/testsuite/gcc.c-torture/compile/pr44119.c   
(timeout = 300)
/tmp/hpautotest-gcc0/gcc/gcc/testsuite/gcc.c-torture/compile/pr44119.c: In
function 'func_96':

/tmp/hpautotest-gcc0/gcc/gcc/testsuite/gcc.c-torture/compile/pr44119.c:45:1:
internal compiler error: Floating point exception

0x84ab35 crash_signal

    /tmp/hpautotest-gcc0/gcc/gcc/toplev.c:333

0x7d4bbf predict_loops

    /tmp/hpautotest-gcc0/gcc/gcc/predict.c:1524

0x7d67b4 tree_estimate_probability()

    /tmp/hpautotest-gcc0/gcc/gcc/predict.c:2259

0x7d75d4 tree_estimate_probability_driver

    /tmp/hpautotest-gcc0/gcc/gcc/predict.c:2296


Author of only suspect patch in revision range CC:ed.