bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Use load-store instead of memcpy for short integer arrays

Browse source
This commit is contained in:
Scott McMurray 2023-05-26 03:32:22 -07:00
parent cce0b52e7b
commit e1b020df9f
8 changed files with 136 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

14
compiler/rustc_codegen_ssa/src/base.rs
View file

@ -380,7 +380,19 @@ pub fn memcpy_ty<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
return;
}
bx.memcpy(dst, dst_align, src, src_align, bx.cx().const_usize(size), flags);
if flags == MemFlags::empty()
&& let Some(bty) = bx.cx().scalar_copy_backend_type(layout)
{
// I look forward to only supporting opaque pointers
let pty = bx.type_ptr_to(bty);
let src = bx.pointercast(src, pty);
let dst = bx.pointercast(dst, pty);
let temp = bx.load(bty, src, src_align);
bx.store(temp, dst, dst_align);
} else {
bx.memcpy(dst, dst_align, src, src_align, bx.cx().const_usize(size), flags);
}
}
pub fn codegen_instance<'a, 'tcx: 'a, Bx: BuilderMethods<'a, 'tcx>>(