Verifying compiler optimizations in gcc/g++ by analyzing assembly listings

Question

I just asked a question related to how the compiler optimizes certain C++ code, and I was looking around SO for any questions about how to verify that the compiler has performed

Answer 1

Not gcc, but when debugging in Visual Studio you have the option to intersperse assembly and source, which gives a good idea of what has been generated for what statement. But sometimes it's not quite aligned correctly.

The output of the gcc tool chain and objdump -dS isn't at the same granularity. This article on getting gcc to output source and assembly has the same options as you are using.