2 use rustc_errors::struct_span_err;
6 use super::OperandValue;
7 use crate::traits::BuilderMethods;
10 use rustc_error_codes::*;
12 impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
13 pub fn codegen_statement(&mut self, mut bx: Bx, statement: &mir::Statement<'tcx>) -> Bx {
14 debug!("codegen_statement(statement={:?})", statement);
16 self.set_debug_loc(&mut bx, statement.source_info);
17 match statement.kind {
18 mir::StatementKind::Assign(box (ref place, ref rvalue)) => {
19 if let Some(index) = place.as_local() {
20 match self.locals[index] {
21 LocalRef::Place(cg_dest) => self.codegen_rvalue(bx, cg_dest, rvalue),
22 LocalRef::UnsizedPlace(cg_indirect_dest) => {
23 self.codegen_rvalue_unsized(bx, cg_indirect_dest, rvalue)
25 LocalRef::Operand(None) => {
26 let (mut bx, operand) = self.codegen_rvalue_operand(bx, rvalue);
27 self.locals[index] = LocalRef::Operand(Some(operand));
28 self.debug_introduce_local(&mut bx, index);
31 LocalRef::Operand(Some(op)) => {
32 if !op.layout.is_zst() {
34 statement.source_info.span,
35 "operand {:?} already assigned",
40 // If the type is zero-sized, it's already been set here,
41 // but we still need to make sure we codegen the operand
42 self.codegen_rvalue_operand(bx, rvalue).0
46 let cg_dest = self.codegen_place(&mut bx, &place.as_ref());
47 self.codegen_rvalue(bx, cg_dest, rvalue)
50 mir::StatementKind::SetDiscriminant { box ref place, variant_index } => {
51 self.codegen_place(&mut bx, &place.as_ref())
52 .codegen_set_discr(&mut bx, variant_index);
55 mir::StatementKind::StorageLive(local) => {
56 if let LocalRef::Place(cg_place) = self.locals[local] {
57 cg_place.storage_live(&mut bx);
58 } else if let LocalRef::UnsizedPlace(cg_indirect_place) = self.locals[local] {
59 cg_indirect_place.storage_live(&mut bx);
63 mir::StatementKind::StorageDead(local) => {
64 if let LocalRef::Place(cg_place) = self.locals[local] {
65 cg_place.storage_dead(&mut bx);
66 } else if let LocalRef::UnsizedPlace(cg_indirect_place) = self.locals[local] {
67 cg_indirect_place.storage_dead(&mut bx);
71 mir::StatementKind::InlineAsm(ref asm) => {
75 .map(|output| self.codegen_place(&mut bx, &output.as_ref()))
78 let input_vals = asm.inputs.iter().fold(
79 Vec::with_capacity(asm.inputs.len()),
80 |mut acc, (span, input)| {
81 let op = self.codegen_operand(&mut bx, input);
82 if let OperandValue::Immediate(_) = op.val {
83 acc.push(op.immediate());
89 "invalid value for constraint in inline assembly"
97 if input_vals.len() == asm.inputs.len() {
98 let res = bx.codegen_inline_asm(
102 statement.source_info.span,
107 statement.source_info.span,
109 "malformed inline assembly"
116 mir::StatementKind::FakeRead(..)
117 | mir::StatementKind::Retag { .. }
118 | mir::StatementKind::AscribeUserType(..)
119 | mir::StatementKind::Nop => bx,