Hi, Gcc manual describes "memory" clobber in a inline assembly as follows: If your assembler instructions access memory in an unpredictable fashion, add `memory' to the list of clobbered registers. This will cause GCC to not keep memory values cached in registers across the assembler instruction and not optimize stores or loads to that memory. I have two questions about it. 1. "This will cause GCC to not keep memory values cached in registers ***across*** the assembler instruction" What's the exact meaning of "across"? I think that the gcc will reload a memory value into a register ***after*** the assembler instruction. Is that the case? 2. "and not optimize stores or loads to that memory" Except caching memory values in registers, is there any other optimizaiton for stores or loads to memory?
