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* [Bug ipa/93115] gcc fails to emit inline function on llvm-roc project: -O1 -fPIC -fdevirtualize -fdevirtualize-speculatively -fipa-cp -fipa-cp-clone -fvisibility-inlines-hidden [not found] <bug-93115-4@http.gcc.gnu.org/bugzilla/> @ 2020-10-03 9:12 ` slyfox at gcc dot gnu.org 2021-02-08 13:30 ` slyfox at gcc dot gnu.org 2021-02-08 17:16 ` slyfox at gcc dot gnu.org 2 siblings, 0 replies; 3+ messages in thread From: slyfox at gcc dot gnu.org @ 2020-10-03 9:12 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93115 Sergei Trofimovich <slyfox at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |slyfox at gcc dot gnu.org --- Comment #6 from Sergei Trofimovich <slyfox at gcc dot gnu.org> --- Still happens with gcc-11. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug ipa/93115] gcc fails to emit inline function on llvm-roc project: -O1 -fPIC -fdevirtualize -fdevirtualize-speculatively -fipa-cp -fipa-cp-clone -fvisibility-inlines-hidden [not found] <bug-93115-4@http.gcc.gnu.org/bugzilla/> 2020-10-03 9:12 ` [Bug ipa/93115] gcc fails to emit inline function on llvm-roc project: -O1 -fPIC -fdevirtualize -fdevirtualize-speculatively -fipa-cp -fipa-cp-clone -fvisibility-inlines-hidden slyfox at gcc dot gnu.org @ 2021-02-08 13:30 ` slyfox at gcc dot gnu.org 2021-02-08 17:16 ` slyfox at gcc dot gnu.org 2 siblings, 0 replies; 3+ messages in thread From: slyfox at gcc dot gnu.org @ 2021-02-08 13:30 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93115 --- Comment #7 from Sergei Trofimovich <slyfox at gcc dot gnu.org> --- Looks like original test does not trigger the bug as is (probably due to tets fragility). Here is something shorter (but with warnings): ```c++ struct a { char at; char au; int d() { return av() + au - at; } virtual void f() {} virtual int av() { } }; struct g : a { void f(); char b; char c() { return b; } } b; #ifdef MAIN_FILE g e; void h() { if (b.c()) { e.d(); return; } } int main() {} #endif #ifdef LIB_FILE void g::f() {} #endif ``` $ g++-11.0.0 -Wall -fPIC -O1 -fdevirtualize -fdevirtualize-speculatively -fipa-cp -fipa-cp-clone -fvisibility-inlines-hidden -fPIC -shared -o libbug.so bug.cpp -DLIB_FILE bug.cpp: In member function 'virtual int a::av()': bug.cpp:6:22: warning: no return statement in function returning non-void [-Wreturn-type] 6 | virtual int av() { } | ^ $ g++-11.0.0 -Wall -fPIC -O1 -fdevirtualize -fdevirtualize-speculatively -fipa-cp -fipa-cp-clone -fvisibility-inlines-hidden -o main bug.cpp -DMAIN_FILE -L. -lbug bug.cpp: In member function 'virtual int a::av()': bug.cpp:6:22: warning: no return statement in function returning non-void [-Wreturn-type] 6 | virtual int av() { } | ^ /usr/lib/gcc/x86_64-pc-linux-gnu/11.0.0/../../../../x86_64-pc-linux-gnu/bin/ld: /tmp/ccbaHYef.o: in function `h()': bug.cpp:(.text+0x1a): undefined reference to `a::av()' collect2: error: ld returned 1 exit status ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug ipa/93115] gcc fails to emit inline function on llvm-roc project: -O1 -fPIC -fdevirtualize -fdevirtualize-speculatively -fipa-cp -fipa-cp-clone -fvisibility-inlines-hidden [not found] <bug-93115-4@http.gcc.gnu.org/bugzilla/> 2020-10-03 9:12 ` [Bug ipa/93115] gcc fails to emit inline function on llvm-roc project: -O1 -fPIC -fdevirtualize -fdevirtualize-speculatively -fipa-cp -fipa-cp-clone -fvisibility-inlines-hidden slyfox at gcc dot gnu.org 2021-02-08 13:30 ` slyfox at gcc dot gnu.org @ 2021-02-08 17:16 ` slyfox at gcc dot gnu.org 2 siblings, 0 replies; 3+ messages in thread From: slyfox at gcc dot gnu.org @ 2021-02-08 17:16 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93115 --- Comment #8 from Sergei Trofimovich <slyfox at gcc dot gnu.org> --- Slightly better example without warnings (used `__builtin_trap();` to work around use of uninitialized value): ```c++ struct a { char ac1; char ac2; int d() { return av() + ac1 + ac2; } virtual void f() {} virtual int av() { __builtin_trap(); } a(){} }; struct g : a { virtual void f2(); g():a(){} }; #ifdef LIB_FILE void g::f2() {} #endif #ifdef MAIN_FILE static g b; static char bb; char cc() { return bb; } void h() { if (cc()) { b.d(); return; } } int main() {} #endif ``` ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-02-08 17:16 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <bug-93115-4@http.gcc.gnu.org/bugzilla/> 2020-10-03 9:12 ` [Bug ipa/93115] gcc fails to emit inline function on llvm-roc project: -O1 -fPIC -fdevirtualize -fdevirtualize-speculatively -fipa-cp -fipa-cp-clone -fvisibility-inlines-hidden slyfox at gcc dot gnu.org 2021-02-08 13:30 ` slyfox at gcc dot gnu.org 2021-02-08 17:16 ` slyfox at gcc dot gnu.org
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