1 use rustc_errors::struct_span_err;
6 use super::OperandValue;
7 use crate::traits::BuilderMethods;
10 impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
11 pub fn codegen_statement(&mut self, mut bx: Bx, statement: &mir::Statement<'tcx>) -> Bx {
12 debug!("codegen_statement(statement={:?})", statement);
14 self.set_debug_loc(&mut bx, statement.source_info);
15 match statement.kind {
16 mir::StatementKind::Assign(box (ref place, ref rvalue)) => {
17 if let Some(index) = place.as_local() {
18 match self.locals[index] {
19 LocalRef::Place(cg_dest) => self.codegen_rvalue(bx, cg_dest, rvalue),
20 LocalRef::UnsizedPlace(cg_indirect_dest) => {
21 self.codegen_rvalue_unsized(bx, cg_indirect_dest, rvalue)
23 LocalRef::Operand(None) => {
24 let (mut bx, operand) = self.codegen_rvalue_operand(bx, rvalue);
25 self.locals[index] = LocalRef::Operand(Some(operand));
26 self.debug_introduce_local(&mut bx, index);
29 LocalRef::Operand(Some(op)) => {
30 if !op.layout.is_zst() {
32 statement.source_info.span,
33 "operand {:?} already assigned",
38 // If the type is zero-sized, it's already been set here,
39 // but we still need to make sure we codegen the operand
40 self.codegen_rvalue_operand(bx, rvalue).0
44 let cg_dest = self.codegen_place(&mut bx, place.as_ref());
45 self.codegen_rvalue(bx, cg_dest, rvalue)
48 mir::StatementKind::SetDiscriminant { box ref place, variant_index } => {
49 self.codegen_place(&mut bx, place.as_ref())
50 .codegen_set_discr(&mut bx, variant_index);
53 mir::StatementKind::StorageLive(local) => {
54 if let LocalRef::Place(cg_place) = self.locals[local] {
55 cg_place.storage_live(&mut bx);
56 } else if let LocalRef::UnsizedPlace(cg_indirect_place) = self.locals[local] {
57 cg_indirect_place.storage_live(&mut bx);
61 mir::StatementKind::StorageDead(local) => {
62 if let LocalRef::Place(cg_place) = self.locals[local] {
63 cg_place.storage_dead(&mut bx);
64 } else if let LocalRef::UnsizedPlace(cg_indirect_place) = self.locals[local] {
65 cg_indirect_place.storage_dead(&mut bx);
69 mir::StatementKind::LlvmInlineAsm(ref asm) => {
73 .map(|output| self.codegen_place(&mut bx, output.as_ref()))
76 let input_vals = asm.inputs.iter().fold(
77 Vec::with_capacity(asm.inputs.len()),
78 |mut acc, (span, input)| {
79 let op = self.codegen_operand(&mut bx, input);
80 if let OperandValue::Immediate(_) = op.val {
81 acc.push(op.immediate());
87 "invalid value for constraint in inline assembly"
95 if input_vals.len() == asm.inputs.len() {
96 let res = bx.codegen_llvm_inline_asm(
100 statement.source_info.span,
105 statement.source_info.span,
107 "malformed inline assembly"
114 mir::StatementKind::Coverage(box ref coverage) => {
115 self.codegen_coverage(&mut bx, coverage.clone());
118 mir::StatementKind::CopyNonOverlapping(box mir::CopyNonOverlapping {
123 let dst_val = self.codegen_operand(&mut bx, dst);
124 let src_val = self.codegen_operand(&mut bx, src);
125 let count = self.codegen_operand(&mut bx, count).immediate();
126 let pointee_layout = dst_val
128 .pointee_info_at(&mut bx, rustc_target::abi::Size::ZERO)
129 .expect("Expected pointer");
130 let bytes = bx.mul(count, bx.const_usize(pointee_layout.size.bytes()));
132 let align = pointee_layout.align;
133 let dst = dst_val.immediate();
134 let src = src_val.immediate();
135 bx.memcpy(dst, align, src, align, bytes, crate::MemFlags::empty());
138 mir::StatementKind::FakeRead(..)
139 | mir::StatementKind::Retag { .. }
140 | mir::StatementKind::AscribeUserType(..)
141 | mir::StatementKind::Nop => bx,