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nak: Don't emit MOVs for overlapping vec and split src/dst

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24998>
This commit is contained in:
Faith Ekstrand 2023-04-10 17:23:25 -05:00 • committed by Marge Bot
parent b142347797
commit c68989e49c
1 changed files with 18 additions and 4 deletions
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22
src/nouveau/compiler/nak_ir.rs
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@ -2029,8 +2029,16 @@ impl Shader {
assert!(comps == vec_dst.comps());
for i in 0..comps {
let src = vec.srcs[usize::from(i)];
let dst = Dst::Reg(vec_dst.as_comp(i).unwrap());
instrs.push(Instr::new_mov(dst, src));
let dst = vec_dst.as_comp(i).unwrap();
match src.src_ref {
SrcRef::Reg(reg) => {
if reg == dst {
continue;
}
}
_ => (),
}
instrs.push(Instr::new_mov(dst.into(), src));
}
instrs
}
@ -2042,8 +2050,14 @@ impl Shader {
for i in 0..comps {
let src = vec_src.as_comp(i).unwrap();
let dst = split.dsts[usize::from(i)];
if let Dst::None = dst {
continue;
match dst {
Dst::None => continue,
Dst::Reg(reg) => {
if reg == src {
continue;
}
}
_ => (),
}
instrs.push(Instr::new_mov(dst.into(), src.into()));
}