[Bug c++/86173] New: Default construction of a union (in std::optional)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86173 Bug ID: 86173 Summary: Default construction of a union (in std::optional) Product: gcc Version: 9.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: normal

[Bug libstdc++/80335] perf of copying std::optional

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80335 Marc Glisse changed: What|Removed |Added Status|NEW |RESOLVED Resolution|---

[Bug c++/86173] Default construction of a union (in std::optional)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86173 --- Comment #1 from Marc Glisse --- Note that constructing optional from std::nullopt does avoid the memset.

[Bug c++/86171] [6/7/8/9 Regression] g++ ICE on valid code: tree check: expected var_decl or function_decl, have type_decl in duplicate_decls, at cp/decl.c:2291

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86171 Jakub Jelinek changed: What|Removed |Added Status|UNCONFIRMED |NEW Version|unknown

[Bug libstdc++/80335] perf of copying std::optional

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80335 --- Comment #3 from sgunderson at bigfoot dot com --- Appears to have been fixed in GCC 8, indeed. #include std::optional func() { return 3; } GCC 7 (-O2) compiles to: 0: 48 89 f8mov%rdi,%rax 3: c7 07 03

[Bug c/86174] New: Poor vectorization/register allocation with omp simd, FMA

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86174 Bug ID: 86174 Summary: Poor vectorization/register allocation with omp simd, FMA Product: gcc Version: 8.1.1 Status: UNCONFIRMED Severity: normal Prio

[Bug lto/86175] New: LTO code generator does not respect ld -u option to force symbol inclusion in the link product

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86175 Bug ID: 86175 Summary: LTO code generator does not respect ld -u option to force symbol inclusion in the link product Product: gcc Version: 8.1.1 Status: UNCONFIRMED

[Bug c++/86176] New: Wnull-dereference warning disappears with a call to std::cout on the line after

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86176 Bug ID: 86176 Summary: Wnull-dereference warning disappears with a call to std::cout on the line after Product: gcc Version: 8.1.0 Status: UNCONFIRMED Severity:

[Bug c++/86177] New: Wnull-dereference warning for object file compile missing

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177 Bug ID: 86177 Summary: Wnull-dereference warning for object file compile missing Product: gcc Version: 8.0.1 Status: UNCONFIRMED Severity: normal Prio

[Bug c/86174] Poor vectorization/register allocation with omp simd, FMA

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86174 Alexander Monakov changed: What|Removed |Added CC||amonakov at gcc dot gnu.org --- Comm

[Bug c++/80485] rejects-valid: constexpr static_cast of pointer-to-member-function to bool

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80485 --- Comment #7 from Tony E Lewis --- Ah yes - I'm seeing it compiling cleanly now on Godbolt's trunk (9.0.0 20180615). Must have been a temporary glitch in the build (and couldn't possibly have been due to my error :P ).

[Bug c++/86177] Wnull-dereference warning for object file compile missing

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177 --- Comment #1 from Jonny Grant --- If g++ compiles both main.cpp and main2.cpp at the same time (ie no separate obj file stage) it also doesn't give the expected warning. jonny@asus:~/code$ g++-8 -O2 -Wall -Wextra -Wnull-dereference -Wpedantic

[Bug c/86178] New: No warning when missing return from function main()

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86178 Bug ID: 86178 Summary: No warning when missing return from function main() Product: gcc Version: 8.0.1 Status: UNCONFIRMED Severity: normal Priority: P3 Componen

[Bug c/86178] No warning when missing return from function main()

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86178 Jonathan Wakely changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution|---

[Bug c++/86177] Wnull-dereference warning for object file compile missing

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177 --- Comment #2 from Jonathan Wakely --- That's how C++ works. Each translation unit is compiled separately. It's your job to prevent such errors.

[Bug c/86178] No warning when missing return from function main()

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86178 --- Comment #2 from Jonathan Wakely --- See 4) at http://en.cppreference.com/w/cpp/language/main_function#Explanation There's also an implicit "return 0;" for C, but only since C99 and only when the return type of main is compatible with int. Se

[Bug middle-end/86172] [meta-bug] issues with -Wnull-dereference

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86172 Bug 86172 depends on bug 86177, which changed state. Bug 86177 Summary: Wnull-dereference warning for object file compile missing https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177 What|Removed |Added --

[Bug c++/86177] Wnull-dereference warning for object file compile missing

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177 Jonathan Wakely changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution|---

[Bug c++/85471] closing a "thread" in "C++" using "pthread_exit(NULL)" creates a "SIGABRT"

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85471 --- Comment #4 from Andreas Otto --- change my C++ wrapper from "embedded data" (large amount of data) to just an embedded pointer (only 8byte pointer in the C++ class) → the error is still there… ==57730== Process terminating with default acti

[Bug c/86179] New: ice in get_later_stmt, at tree-vectorizer.h:1108

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86179 Bug ID: 86179 Summary: ice in get_later_stmt, at tree-vectorizer.h:1108 Product: gcc Version: 8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c

[Bug c/86179] ice in get_later_stmt, at tree-vectorizer.h:1108

-linux-gnu Configured with: ../trunk/configure --prefix=/home/dcb/gcc/results.261680.ubsan --with-build-config=bootstrap-ubsan --disable-multilib --disable-werror --enable-checking=df,extra,fold,rtl,yes --enable-languages=c,c++,fortran Thread model: posix gcc version 9.0.0 20180616 (experimental) (GCC) $

[Bug tree-optimization/64946] [AArch64] gcc.target/aarch64/vect-abs-compile.c - "abs" vectorization fails for char/short types

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64946 --- Comment #24 from kugan at gcc dot gnu.org --- Author: kugan Date: Sat Jun 16 21:34:29 2018 New Revision: 261681 URL: https://gcc.gnu.org/viewcvs?rev=261681&root=gcc&view=rev Log: gcc/ChangeLog: 2018-06-16 Kugan Vivekanandarajah P

[Bug middle-end/82479] missing popcount builtin detection

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82479 --- Comment #13 from kugan at gcc dot gnu.org --- Author: kugan Date: Sat Jun 16 21:39:31 2018 New Revision: 261682 URL: https://gcc.gnu.org/viewcvs?rev=261682&root=gcc&view=rev Log: gcc/ChangeLog: 2018-06-16 Kugan Vivekanandarajah P

[Bug c++/86177] Wnull-dereference warning for object file compile missing

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177 --- Comment #4 from Jonny Grant --- Thank you for your replies! Could the -flto tip be added to the -Wnull-dereference documentation? https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html

[Bug c++/86177] Wnull-dereference warning for object file compile missing

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86177 --- Comment #5 from Jonathan Wakely --- Why add it there and not to every other warning option that depends on interprocedural analysis and inlining? If the dereference and the null pointer are in separate files, then of course the compiler can'

[Bug c++/86180] New: Friend function definition not instantiated in certain circumstances

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86180 Bug ID: 86180 Summary: Friend function definition not instantiated in certain circumstances Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal

[Bug c++/86181] New: static object mangling conflicts

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86181 Bug ID: 86181 Summary: static object mangling conflicts Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++

[Bug c++/86182] New: gcc crashes when compiling the code

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86182 Bug ID: 86182 Summary: gcc crashes when compiling the code Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++

[Bug c++/86183] New: Scoped enumeration instantiated even if not required

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86183 Bug ID: 86183 Summary: Scoped enumeration instantiated even if not required Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Compo

[Bug c++/86184] New: Shall gcc support this feature?

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86184 Bug ID: 86184 Summary: Shall gcc support this feature? Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ A

[Bug c++/86185] New: gcc does not reject the ill-formed code

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86185 Bug ID: 86185 Summary: gcc does not reject the ill-formed code Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++

[Bug c++/86186] New: Unqualified calls of std::get lead to ADL issues

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86186 Bug ID: 86186 Summary: Unqualified calls of std::get lead to ADL issues Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component

[Bug c++/86187] New: Subscript operator applied to an temporary array results in an lvalue

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86187 Bug ID: 86187 Summary: Subscript operator applied to an temporary array results in an lvalue Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal

[Bug libstdc++/86188] New: Enhancement to std::merge, constexpr check of iterator types

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86188 Bug ID: 86188 Summary: Enhancement to std::merge, constexpr check of iterator types Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal

[Bug driver/40960] POSIX requires that option -D have a lower precedence than -U

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40960 Eric Gallager changed: What|Removed |Added See Also||https://gcc.gnu.org/bugzill

[Bug driver/29931] following argv[0] symlink in process_command breaks symlinked-together toolchain

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29931 Eric Gallager changed: What|Removed |Added Status|NEW |WAITING --- Comment #7 from Eric Gallage

[Bug c++/68615] Unhelpful location when missing a semi-colon on a function declaration at the end of a header

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68615 Eric Gallager changed: What|Removed |Added Status|NEW |ASSIGNED --- Comment #4 from Eric Gallag

[Bug c++/56084] poor error recovery for missing ";"

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56084 Eric Gallager changed: What|Removed |Added Status|NEW |ASSIGNED --- Comment #9 from Eric Gallag

[Bug other/84904] Implement an option to attempt to auto-apply fix-it hints

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84904 Eric Gallager changed: What|Removed |Added Status|UNCONFIRMED |ASSIGNED Last reconfirmed|

[Bug c/84887] missing semicolon: further improvements

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84887 Eric Gallager changed: What|Removed |Added Status|UNCONFIRMED |ASSIGNED Last reconfirmed|

[Bug c++/85867] Subscript operator applied to an temporary array results in an lvalue

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85867 Marc Glisse changed: What|Removed |Added CC||zhonghao at pku dot org.cn --- Comment #3

[Bug c++/86187] Subscript operator applied to an temporary array results in an lvalue

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86187 Marc Glisse changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution|---