https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65177
Bug ID: 65177
Summary: [5 Regression]: extend jump thread for finite state
automata causes miscompilation
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: spop at gcc dot gnu.org
Hello.
Starting with r218451, http://hmmer.janelia.org/ started to be miscompiled.
Steps to reproduce:
wget
http://selab.janelia.org/software/hmmer3/3.1b1/hmmer-3.1b1-linux-intel-x86_64.tar.gz
tar xvzf hmmer-3.1b1-cygwin.tar.gz
cd hmmer-3.1b1-cygwin
CFLAGS="-g -O1 -ftree-vrp -fexpensive-optimizations" ./configure
make
make check
and following test fails:
gdb src/impl_sse/optacc_utest
Program received signal SIGSEGV, Segmentation fault.
0x0000000000406a2c in select_i (k=<optimized out>, i=0, gx=0x45ed60,
gm=0x470420) at generic_optacc.c:293
293 path[0] = TSCDELTA(p7P_MI, k) * MMX(i-1,k);
(gdb) bt
#0 0x0000000000406a2c in select_i (k=<optimized out>, i=0, gx=0x45ed60,
gm=0x470420) at generic_optacc.c:293
#1 p7_GOATrace (gm=0x470420, pp=pp@entry=0x466150, gx=gx@entry=0x45ed60,
tr=tr@entry=0x46e4e0) at generic_optacc.c:220
#2 0x000000000040322f in utest_optacc (go=go@entry=0x44e010,
r=r@entry=0x44e170, abc=abc@entry=0x44eb50, bg=bg@entry=0x44ed90, M=M@entry=45,
L=L@entry=50, N=19) at ./optacc.c:659
#3 0x0000000000403613 in main (argc=<optimized out>, argv=<optimized out>) at
./optacc.c:801
I really tried to reduce test case, but unfortunately it's very hard to do it
for the project.
Please tell me if you are capable of reproducing the issue?
Thanks,
Martin
