search for: mod_input

...e the poor code generation for x86-64. opt -sroa current_input.ll -S -o - | llc -O3 -o - You will see 2 vmovd and 1 shrq that can be avoided as illustrated with the next command. Here is a nicer code produced by modifying the input so that SROA generates friendlier code for this case. opt -sroa mod_input.ll -S -o - | llc -O3 -o - Basically the difference between both inputs is that memcpy has not been expanded in mod_input.ll (instcombine normally replaces it). Thus, SROA inserts its own loads to get rid of the memcpy instead of extracting the values from the 64-bits loads. ** Advices Required *...

...- | llc -O3 -o - >> >> You will see 2 vmovd and 1 shrq that can be avoided as illustrated with the >> next command. >> >> Here is a nicer code produced by modifying the input so that SROA generates >> friendlier code for this case. >> >> opt -sroa mod_input.ll -S -o - | llc -O3 -o - >> >> Basically the difference between both inputs is that memcpy has not been >> expanded in mod_input.ll (instcombine normally replaces it). Thus, SROA >> inserts its own loads to get rid of the memcpy instead of extracting the >> values fr...

...t; opt -sroa current_input.ll -S -o - | llc -O3 -o - > > You will see 2 vmovd and 1 shrq that can be avoided as illustrated with the > next command. > > Here is a nicer code produced by modifying the input so that SROA generates > friendlier code for this case. > > opt -sroa mod_input.ll -S -o - | llc -O3 -o - > > Basically the difference between both inputs is that memcpy has not been > expanded in mod_input.ll (instcombine normally replaces it). Thus, SROA > inserts its own loads to get rid of the memcpy instead of extracting the > values from the 64-bits loads....

...t; opt -sroa current_input.ll -S -o - | llc -O3 -o - > > You will see 2 vmovd and 1 shrq that can be avoided as illustrated with the > next command. > > Here is a nicer code produced by modifying the input so that SROA generates > friendlier code for this case. > > opt -sroa mod_input.ll -S -o - | llc -O3 -o - > > Basically the difference between both inputs is that memcpy has not been > expanded in mod_input.ll (instcombine normally replaces it). Thus, SROA > inserts its own loads to get rid of the memcpy instead of extracting the > values from the 64-bits loads....