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Build StKind::CopyOverlapping

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This replaces where it was previously being constructed in intrinsics, with direct construction
of the Statement.
This commit is contained in:
kadmin
2021-01-23 03:55:41 +00:00
parent 845e4b5962
commit d4ae9ff826
5 changed files with 100 additions and 77 deletions
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14
compiler/rustc_codegen_ssa/src/mir/statement.rs
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@@ -123,20 +123,16 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
let dst_val = self.codegen_operand(&mut bx, dst);
let src_val = self.codegen_operand(&mut bx, src);
let count = self.codegen_operand(&mut bx, count).immediate();
let get_val_align = |oper_ref: crate::mir::OperandRef<'_, _>| match oper_ref.val {
OperandValue::Ref(val, _, align) => (val, align),
_ => unreachable!(),
};
let pointee_layout = dst_val
.layout
.pointee_info_at(&mut bx, rustc_target::abi::Size::ZERO)
.expect("Expected pointer");
let elem_size = bx.const_u64(pointee_layout.size.bytes());
let byte_count = bx.mul(count, elem_size);
let bytes = bx.mul(count, bx.const_usize(pointee_layout.size.bytes()));
let (dst, dst_align) = get_val_align(dst_val);
let (src, src_align) = get_val_align(src_val);
bx.memcpy(dst, dst_align, src, src_align, byte_count, crate::MemFlags::empty());
let align = pointee_layout.align;
let dst = dst_val.immediate();
let src = src_val.immediate();
bx.memcpy(dst, align, src, align, bytes, crate::MemFlags::empty());
bx
}
mir::StatementKind::FakeRead(..)