Clang's -O0 output: branch displacement and size increase :

tl;dr Clang 19 will remove the -mrelax-all default at -O0, significantly decreasing the text section size for x86. Span-dependent instructions In assembly languages, some instructions with an immediat

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Eli Bendersky , Thomasg Szymanski , Michael Berris , Craig Topper , , Assembling Span Dependent , Machine Code ,