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[Bug tree-optimization/53007] New: [4.8 REGRESSION] ICE verify_ssa failed with -Ofast and lto
- From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 16 Apr 2012 12:40:46 +0000
- Subject: [Bug tree-optimization/53007] New: [4.8 REGRESSION] ICE verify_ssa failed with -Ofast and lto
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53007
Bug #: 53007
Summary: [4.8 REGRESSION] ICE verify_ssa failed with -Ofast and
lto
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: vincenzo.innocente@cern.ch
Created attachment 27168
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27168
tar compressed directory containing the "test case"
I'm sure it was not the case with
gcc version 4.8.0 20120403 (experimental) (GCC)
being in lto not easy to produce a reduced test case:
attached the whole directory
tar -zxf buggy.tgz
cd buggy
c++ -Ofast *.c
[innocent@vinavx0 buggy]$ c++ -O3 *.c -flto
[innocent@vinavx0 buggy]$ c++ -Ofast *.c -flto
In file included from :6:0:
kernel.c: In function 'kernel_measureLU':
kernel.c:188:12: error: definition in block 26 follows the use
double kernel_measureLU(int N, double min_time, Random R)
^
for SSA_NAME: reassocpow.3_161 in statement:
D.2821_127 = reassocpow.3_161 *
6.6666666666666662965923251249478198587894439697265625e-1;
kernel.c:188:12: internal compiler error: verify_ssa failed
double kernel_measureLU(int N, double min_time, Random R)
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
lto-wrapper: c++ returned 1 exit status
collect2: error: lto-wrapper returned 1 exit status
[innocent@vinavx0 buggy]$ c++ -v
Using built-in specs.
COLLECT_GCC=c++
COLLECT_LTO_WRAPPER=/afs/cern.ch/user/i/innocent/w2/libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ./configure --prefix=/afs/cern.ch/user/i/innocent/w2
--enable-languages=c,c++,fortran -enable-gold=yes --enable-lto
--with-build-config=bootstrap-lto --with-gmp-lib=/usr/local/lib64
--with-mpfr-lib=/usr/local/lib64 -with-mpc-lib=/usr/local/lib64
--enable-cloog-backend=isl --with-cloog=/usr/local
--with-ppl-lib=/usr/local/lib64 CFLAGS='-O2 -ftree-vectorize -fPIC'
CXXFLAGS='-O2 -fPIC -ftree-vectorize -fvisibility-inlines-hidden -march=native'
-enable-libitm -disable-multilib
Thread model: posix
gcc version 4.8.0 20120416 (experimental) (GCC)