https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89009
Bug ID: 89009
Summary: Miscompilation (missing function call) with
-fvisibility=hidden -fpic -O2 -fno-inline
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: sbergman at redhat dot com
Target Milestone: ---
On Linux x86-64 with at least with GCC 8.2.1 (gcc-8.2.1-6.fc29.x86_64) and
recent trunk towards GCC 9, compiling
> $ cat test.cc
> void f1();
> struct S1 { static void f2(); };
> struct __attribute__ ((visibility("default"))) S2: S1 { static void f2(); };
> struct S3: S1 { static void f2(); };
> struct S4: S3 { static void f2(); };
> void S2::f2() { S1::f2(); }
> void S3::f2() { S1::f2(); }
> void S4::f2() {
> f1();
> S3::f2(); // MISSING
> }
>
> $ g++ -fvisibility=hidden -fpic -O2 -fno-inline -S test.cc
causes the call to S3::f2 to be missing from the code generated for S4::f2:
> .globl _ZN2S42f2Ev
> .hidden _ZN2S42f2Ev
> .type _ZN2S42f2Ev, @function
> _ZN2S42f2Ev:
> .LFB2:
> .cfi_startproc
> jmp _Z2f1v@PLT
> .cfi_endproc
> .LFE2:
> .size _ZN2S42f2Ev, .-_ZN2S42f2Ev
