On Tue, Feb 07, 2023 at 09:37:37AM -0700, Nathan Chancellor wrote: > Clang does its semantic analysis before optimization, so it cannot dead > code eliminate that chunk before it checks the validity of the asm > constraints, that is just how the pipeline is structured as far as I > understand it. That is one of the biggest and longest standing > differences between clang and GCC that we know about, the upstream link > in the issue below has some more info. > > https://github.com/ClangBuiltLinux/linux/issues/3 > > I am not super familiar with the internal details of LLVM and clang as > other folks are though so I could be wrong or missing something :) Thanks and wow, that's issue #3. Like wow that's old. And reading Nick's text, it sure does sound like that's the one. Fun. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
