not reproducible:
$ g++ -finline-functions -m64 -O3 -c -g -MMD -MP -MF "main.o.d" -o main.o main.cpp main.cpp: In function 'void p(AV)': main.cpp:80:6: note: The ABI for passing parameters with 32-byte alignment has changed in GCC 4.6 void p(union AV a) { ^
not reproducible:
$ g++ -finline-functions -m64 -O3 -c -g -MMD -MP -MF "main.o.d" -o main.o main.cpp
main.cpp: In function 'void p(AV)':
main.cpp:80:6: note: The ABI for passing parameters with 32-byte alignment has changed in GCC 4.6
void p(union AV a) {
^