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Hello > and as the return value. Is this a missed optimization from LLVM or did i > miss something out? > Changing the register allocation order didnt work. What are the patterns for xor / mov ? -- With best regards, Anton Korobeynikov Faculty of Mathematics and Mechanics, Saint Petersburg State University

Hello, while testing trivial functions in my backend i noticed a suboptimal way of assigning regs that had the following pattern, consider the following function: typedef unsigned short t; t foo(t a, t b) { t a4 = b^a^18; return a4; } Argument "a" is passed in R15:R14 and argument "b" is passed in R13:R12, the return value is stored in R15:R14. Producing the