Question regarding C code generation for a compound condition

[Jonathan Wakely]

See http://blog.llvm.org/2011/05/what-every-c-programmer-should-know.html
and http://blog.llvm.org/2011/05/what-every-c-programmer-should-know_14.html
and http://blog.llvm.org/2011/05/what-every-c-programmer-should-know_21.html
for lots more on this subject.