[Bug ipa/93223] New: Segmentation fault in ipa-cp.c
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93223 Bug ID: 93223 Summary: Segmentation fault in ipa-cp.c Product: gcc Version: 9.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: ipa Assignee: unassigned at gcc dot gnu.org Reporter: christoph.hoeger at celeraone dot com CC: marxin at gcc dot gnu.org Target Milestone: --- Created attachment 47629 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47629&action=edit test The following crash occurs under a specific combination of anonymous namespace, disabled optimizations and the usage of function pointers with -O3 : gcc_bug g++ -O3 -c demo.cpp during IPA pass: cp /tmp/test.cpp:59:1: internal compiler error: Segmentation fault 59 | } | ^ 0x8cdeef ??? ../../gcc/toplev.c:327 0x15ab641 ??? ../../gcc/ipa-cp.c:2570 0x15ad6ad ??? ../../gcc/ipa-cp.c:2828 0x15aa364 ??? ../../gcc/ipa-cp.c:3025 0x15a827d ??? ../../gcc/ipa-cp.c:3196 0x1163fc6 ??? ../../gcc/passes.c:2508 0x14da21a ??? ../../gcc/passes.c:2948 0x1472bf7 ??? ../../gcc/cgraphunit.c:2542 0x10157d4 ??? ../../gcc/cgraphunit.c:2865 0x14e804f ??? ../../gcc/toplev.c:482 0xec7947 ??? ../../gcc/toplev.c:2206 0xec9a5f ??? ../../gcc/main.c:39 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://bugzilla.redhat.com/bugzilla> for instructions. Preprocessed source stored into /tmp/ccwnkWOK.out file, please attach this to your bugreport. See attached file demo.cpp for reproduction. According to godbolt, the issue persists in trunk: https://godbolt.org/z/T_NMPf Please note the suspicuous line here: https://github.com/gcc-mirror/gcc/blob/gcc-9_2_0-release/gcc/ipa-cp.c#L2569 it looks like the result of ipa_fn_summaries->get (callee); should be checked for nullptr. Also, the issue is rather hard to trigger as it seems to depend on heuristic optimizations.
[Bug c++/91023] New: Unification Fails for parameter pack
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91023
Bug ID: 91023
Summary: Unification Fails for parameter pack
Product: gcc
Version: 9.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: christoph.hoeger at celeraone dot com
Target Milestone: ---
Created attachment 46529
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46529&action=edit
Automatically generated preprocessed output
In the example below, the unification of the template argument fails with the
message:
➜ gcc.bug g++ --std=c++17 input.cpp
input.cpp: In substitution of 'template
std::optional > parse_variant(const Foo >& ...) [with T = ]':
input.cpp:33:43: required from here
input.cpp:33:43: internal compiler error: in tsubst, at cp/pt.c:14560
33 | const auto x = parse_variant(a(), b());
| ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
Preprocessed source stored into /tmp/cc1jpH2s.out file, please attach this to
your bugreport.
distcc[31035] ERROR: compile input.cpp on localhost failed
Example:
#include
#include
template
struct Foo
{
};
template
std::optional>
parse_variant(const Foo> &... variants)
{
return {};
}
struct A {};
struct B {};
using var_test = std::variant;
Foo a()
{
return {};
}
Foo b()
{
return {};
}
int main()
{
const auto x = parse_variant(a(), b());
return 0;
}
gcc version information:
➜ gcc.bug g++ -v
Using built-in specs.
COLLECT_GCC=/usr/bin/g++
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,fortran,objc,obj-c++,ada,go,d,lto --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --with-isl --enable-offload-targets=nvptx-none
--without-cuda-driver --enable-gnu-indirect-function --enable-cet
--with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 9.1.1 20190503 (Red Hat 9.1.1-1) (GCC)
[Bug c++/91023] Unification Fails for parameter pack
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91023
--- Comment #1 from Christoph Höger ---
Since it might help investigating the issue, here is a workaround:
#include
#include
template
struct Foo
{
};
template
std::optional>
parse_variant(const Foo &... variants)
{
return {};
}
struct A {};
struct B {};
using var_test = std::variant;
Foo a()
{
return {};
}
Foo b()
{
return {};
}
int main()
{
const auto x = parse_variant(a(), b());
return 0;
}
[Bug bootstrap/101245] New: Bootstrap fails for a combined tree with --enable-shared
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101245 Bug ID: 101245 Summary: Bootstrap fails for a combined tree with --enable-shared Product: gcc Version: 11.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: christoph.hoeger at celeraone dot com Target Milestone: --- Created attachment 51075 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51075&action=edit Reproduction build script I tried to bootstrap gcc 11.1.0 with binutils 2.36.1 in a combined tree and the build fails in stage2 when building libiberty. The failure stems from as not finding its shared libraries (opcode and bfd). The RPATH is set wrong: ➜ test2 readelf -d build/prev-gas/.libs/lt-as-new | grep RPATH 0x000f (RPATH) Library rpath: [/home/choeger/c1/scratch/gcc-combined/test2/build/opcodes/.libs:/home/choeger/c1/scratch/gcc-combined/test2/build/bfd/.libs:/usr/local/lib] ➜ test2 As you can see, the RPATH is not reset to the prev- directories. ➜ test2 build/prev-gas/as-new /home/choeger/c1/scratch/gcc-combined/test2/build/prev-gas/.libs/lt-as-new: error while loading shared libraries: libopcodes-2.36.1.so: cannot open shared object file: No such file or directory Find attached a script to reproduce the issue.
