search for: ldpair

...ter bank and register bank moves are almost as expensive as loads (instructions 3. and 6.). Cost: ldi64 + 2 int_to_fp vs. 2 ldfloat Scenario #2 Paired loads are available on the target. Truncate and shift instructions are useless (instructions 2., 4., and 5.). Cost: ldi64 + 2 trunc + 1 shift vs. 1 ldpair ** To Reproduce ** Here is a way to reproduce 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 gene...

...ve as loads (instructions 3. and 6.). >> Cost: ldi64 + 2 int_to_fp vs. 2 ldfloat >> >> Scenario #2 >> Paired loads are available on the target. Truncate and shift instructions >> are useless (instructions 2., 4., and 5.). >> Cost: ldi64 + 2 trunc + 1 shift vs. 1 ldpair >> >> >> ** To Reproduce ** >> >> Here is a way to reproduce 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 >...

...ves are almost as expensive as loads (instructions 3. and 6.). > Cost: ldi64 + 2 int_to_fp vs. 2 ldfloat > > Scenario #2 > Paired loads are available on the target. Truncate and shift instructions > are useless (instructions 2., 4., and 5.). > Cost: ldi64 + 2 trunc + 1 shift vs. 1 ldpair > > > ** To Reproduce ** > > Here is a way to reproduce 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...

...ves are almost as expensive as loads (instructions 3. and 6.). > Cost: ldi64 + 2 int_to_fp vs. 2 ldfloat > > Scenario #2 > Paired loads are available on the target. Truncate and shift instructions > are useless (instructions 2., 4., and 5.). > Cost: ldi64 + 2 trunc + 1 shift vs. 1 ldpair > > > ** To Reproduce ** > > Here is a way to reproduce 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...