Hi, > I'm using the ppc-linux gcc-4.2.2 compiler and noted the code > size have increased significantly (about 40%!), comparing with > old 4.0.0 when using the -Os option. Same code, same compile- > and configuration-time options. Binutils are differ > (2.16.1 vs 2.17.50), though.
what LLVM version is old 4.0.0? Are you compiling C++ (I don't know what CSiBE is)? Are you using exception handling? > I've looked at the CSiBE testing results for ppc-elf with -Os, > comparing gcc_4_0_0 with mainline and found that the mainline > actually optimizes better, at least for the CSiBE test environment. > After some analysis I've came to the following results: > Number of packages in the CSiBE test environment: 863 > N of packages where mainline GCC optimizes better: 290 > N of packages where mainline GCC optimizes worse: 436 From these numbers it looks like llvm-gcc is better than mainline most of the time. However you say: "... found that the mainline actually optimizes better". Can you please clarify. Best wishes, Duncan.
