https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88930
Bug ID: 88930 Summary: [GCOV] Wrong frequences when a if statement is after a ?: statement in gcov Product: gcc Version: 8.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: gcov-profile Assignee: unassigned at gcc dot gnu.org Reporter: yangyibiao at nju dot edu.cn CC: marxin at gcc dot gnu.org Target Milestone: --- $ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 8.2.0-1ubuntu2~18.04' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-8 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 8.2.0 (Ubuntu 8.2.0-1ubuntu2~18.04) $ cat small.c void foo(long dx, long dy, int xi, int yi) { int hints = 0; if (dy != 0 && (dx <= 1155)) { hints = dy > 0 ? 2 : 1; if (xi) { hints = 1; } } else if (dx != 0 && (dy <= 0)) { hints = 2; } else { hints = 3; } } void main() { foo(0, 18481, 1, 0); } $ gcc --coverage small.c; ./a.out; gcov small.c; cat small.c.gcov File 'small.c' Lines executed:76.92% of 13 Creating 'small.c.gcov' -: 0:Source:small.c -: 0:Graph:small.gcno -: 0:Data:small.gcda -: 0:Runs:1 -: 0:Programs:1 1: 1:void foo(long dx, long dy, int xi, int yi) -: 2:{ 1: 3: int hints = 0; 1: 4: if (dy != 0 && (dx <= 1155)) { 1*: 5: hints = dy > 0 ? 2 : 1; 2: 6: if (xi) { 1: 7: hints = 1; -: 8: } #####: 9: } else if (dx != 0 && (dy <= 0)) { #####: 10: hints = 2; -: 11: } else { #####: 12: hints = 3; -: 13: } 1: 14:} 1: 15:void main() -: 16:{ 1: 17: foo(0, 18481, 1, 0); 1: 18:} Line #6 is wrongly marked as executed twice. However, the foo function is call only once and there is no loop in function foo.