bjoernager/rust
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Transfered memcpy and memset to BuilderMethods

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This commit is contained in:
Denis Merigoux 2018-09-10 17:59:20 +02:00 • committed by Eduard-Mihai Burtescu
parent 3c082a23e8
commit a5aeb8edd6
8 changed files with 112 additions and 101 deletions
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41
src/librustc_codegen_llvm/base.rs
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@ -433,30 +433,6 @@ pub fn to_immediate_scalar<'a, 'tcx: 'a, Builder: BuilderMethods<'a, 'tcx>>(
val
}
pub fn call_memcpy<'a, 'tcx: 'a, Builder: BuilderMethods<'a, 'tcx>>(
bx: &Builder,
dst: Builder::Value,
dst_align: Align,
src: Builder::Value,
src_align: Align,
n_bytes: Builder::Value,
flags: MemFlags,
) {
if flags.contains(MemFlags::NONTEMPORAL) {
// HACK(nox): This is inefficient but there is no nontemporal memcpy.
let val = bx.load(src, src_align);
let ptr = bx.pointercast(dst, bx.cx().type_ptr_to(bx.cx().val_ty(val)));
bx.store_with_flags(val, ptr, dst_align, flags);
return;
}
let cx = bx.cx();
let src_ptr = bx.pointercast(src, cx.type_i8p());
let dst_ptr = bx.pointercast(dst, cx.type_i8p());
let size = bx.intcast(n_bytes, cx.type_isize(), false);
let volatile = flags.contains(MemFlags::VOLATILE);
bx.memcpy(dst_ptr, dst_align.abi(), src_ptr, src_align.abi(), size, volatile);
}
pub fn memcpy_ty<'a, 'tcx: 'a, Builder: BuilderMethods<'a, 'tcx>>(
bx: &Builder,
dst: Builder::Value,
@ -471,22 +447,7 @@ pub fn memcpy_ty<'a, 'tcx: 'a, Builder: BuilderMethods<'a, 'tcx>>(
return;
}
call_memcpy(bx, dst, dst_align, src, src_align, bx.cx().const_usize(size), flags);
}
pub fn call_memset<'a, 'tcx: 'a, Builder: BuilderMethods<'a, 'tcx>>(
bx: &Builder,
ptr: Builder::Value,
fill_byte: Builder::Value,
size: Builder::Value,
align: Builder::Value,
volatile: bool,
) -> Builder::Value {
let ptr_width = &bx.sess().target.target.target_pointer_width;
let intrinsic_key = format!("llvm.memset.p0i8.i{}", ptr_width);
let llintrinsicfn = bx.cx().get_intrinsic(&intrinsic_key);
let volatile = bx.cx().const_bool(volatile);
bx.call(llintrinsicfn, &[ptr, fill_byte, size, align, volatile], None)
bx.memcpy(dst, dst_align, src, src_align, bx.cx().const_usize(size), flags);
}
pub fn codegen_instance<'a, 'tcx>(cx: &CodegenCx<'a, 'tcx>, instance: Instance<'tcx>) {