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Commit | Line | Data |
---|---|---|
dfeec247 | 1 | use rustc_errors::struct_span_err; |
ba9703b0 | 2 | use rustc_middle::mir; |
3157f602 | 3 | |
2c00a5a8 | 4 | use super::FunctionCx; |
3157f602 | 5 | use super::LocalRef; |
0bf4aa26 | 6 | use super::OperandValue; |
dfeec247 | 7 | use crate::traits::BuilderMethods; |
9fa01778 | 8 | use crate::traits::*; |
92a42be0 | 9 | |
dc9dc135 | 10 | impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> { |
dfeec247 | 11 | pub fn codegen_statement(&mut self, mut bx: Bx, statement: &mir::Statement<'tcx>) -> Bx { |
94b46f34 | 12 | debug!("codegen_statement(statement={:?})", statement); |
92a42be0 | 13 | |
a1dfa0c6 | 14 | self.set_debug_loc(&mut bx, statement.source_info); |
92a42be0 | 15 | match statement.kind { |
dfeec247 | 16 | mir::StatementKind::Assign(box (ref place, ref rvalue)) => { |
e74abb32 XL |
17 | if let Some(index) = place.as_local() { |
18 | match self.locals[index] { | |
dfeec247 | 19 | LocalRef::Place(cg_dest) => self.codegen_rvalue(bx, cg_dest, rvalue), |
b7449926 XL |
20 | LocalRef::UnsizedPlace(cg_indirect_dest) => { |
21 | self.codegen_rvalue_unsized(bx, cg_indirect_dest, rvalue) | |
22 | } | |
3157f602 | 23 | LocalRef::Operand(None) => { |
e1599b0c | 24 | let (mut bx, operand) = self.codegen_rvalue_operand(bx, rvalue); |
e74abb32 XL |
25 | self.locals[index] = LocalRef::Operand(Some(operand)); |
26 | self.debug_introduce_local(&mut bx, index); | |
2c00a5a8 | 27 | bx |
3157f602 | 28 | } |
ff7c6d11 XL |
29 | LocalRef::Operand(Some(op)) => { |
30 | if !op.layout.is_zst() { | |
dfeec247 XL |
31 | span_bug!( |
32 | statement.source_info.span, | |
33 | "operand {:?} already assigned", | |
34 | rvalue | |
35 | ); | |
92a42be0 | 36 | } |
ff7c6d11 XL |
37 | |
38 | // If the type is zero-sized, it's already been set here, | |
94b46f34 XL |
39 | // but we still need to make sure we codegen the operand |
40 | self.codegen_rvalue_operand(bx, rvalue).0 | |
92a42be0 SL |
41 | } |
42 | } | |
3157f602 | 43 | } else { |
74b04a01 | 44 | let cg_dest = self.codegen_place(&mut bx, place.as_ref()); |
94b46f34 | 45 | self.codegen_rvalue(bx, cg_dest, rvalue) |
92a42be0 SL |
46 | } |
47 | } | |
dfeec247 | 48 | mir::StatementKind::SetDiscriminant { box ref place, variant_index } => { |
74b04a01 | 49 | self.codegen_place(&mut bx, place.as_ref()) |
a1dfa0c6 | 50 | .codegen_set_discr(&mut bx, variant_index); |
2c00a5a8 | 51 | bx |
5bcae85e | 52 | } |
ea8adc8c | 53 | mir::StatementKind::StorageLive(local) => { |
94b46f34 | 54 | if let LocalRef::Place(cg_place) = self.locals[local] { |
a1dfa0c6 | 55 | cg_place.storage_live(&mut bx); |
b7449926 | 56 | } else if let LocalRef::UnsizedPlace(cg_indirect_place) = self.locals[local] { |
a1dfa0c6 | 57 | cg_indirect_place.storage_live(&mut bx); |
ff7c6d11 | 58 | } |
2c00a5a8 | 59 | bx |
5bcae85e | 60 | } |
ea8adc8c | 61 | mir::StatementKind::StorageDead(local) => { |
94b46f34 | 62 | if let LocalRef::Place(cg_place) = self.locals[local] { |
a1dfa0c6 | 63 | cg_place.storage_dead(&mut bx); |
b7449926 | 64 | } else if let LocalRef::UnsizedPlace(cg_indirect_place) = self.locals[local] { |
a1dfa0c6 | 65 | cg_indirect_place.storage_dead(&mut bx); |
ff7c6d11 | 66 | } |
2c00a5a8 | 67 | bx |
5bcae85e | 68 | } |
ba9703b0 | 69 | mir::StatementKind::LlvmInlineAsm(ref asm) => { |
dfeec247 XL |
70 | let outputs = asm |
71 | .outputs | |
72 | .iter() | |
74b04a01 | 73 | .map(|output| self.codegen_place(&mut bx, output.as_ref())) |
dfeec247 | 74 | .collect(); |
8bb4bdeb | 75 | |
dfeec247 XL |
76 | let input_vals = asm.inputs.iter().fold( |
77 | Vec::with_capacity(asm.inputs.len()), | |
78 | |mut acc, (span, input)| { | |
a1dfa0c6 | 79 | let op = self.codegen_operand(&mut bx, input); |
0bf4aa26 XL |
80 | if let OperandValue::Immediate(_) = op.val { |
81 | acc.push(op.immediate()); | |
0bf4aa26 | 82 | } else { |
dfeec247 XL |
83 | struct_span_err!( |
84 | bx.sess(), | |
85 | span.to_owned(), | |
86 | E0669, | |
87 | "invalid value for constraint in inline assembly" | |
88 | ) | |
89 | .emit(); | |
0bf4aa26 | 90 | } |
a1dfa0c6 | 91 | acc |
dfeec247 XL |
92 | }, |
93 | ); | |
8bb4bdeb | 94 | |
532ac7d7 | 95 | if input_vals.len() == asm.inputs.len() { |
ba9703b0 | 96 | let res = bx.codegen_llvm_inline_asm( |
e1599b0c XL |
97 | &asm.asm, |
98 | outputs, | |
99 | input_vals, | |
100 | statement.source_info.span, | |
101 | ); | |
0bf4aa26 | 102 | if !res { |
dfeec247 XL |
103 | struct_span_err!( |
104 | bx.sess(), | |
105 | statement.source_info.span, | |
106 | E0668, | |
107 | "malformed inline assembly" | |
108 | ) | |
109 | .emit(); | |
0bf4aa26 XL |
110 | } |
111 | } | |
2c00a5a8 | 112 | bx |
8bb4bdeb | 113 | } |
3dfed10e | 114 | mir::StatementKind::Coverage(box ref coverage) => { |
6a06907d XL |
115 | self.codegen_coverage(&mut bx, coverage.clone(), statement.source_info.scope); |
116 | bx | |
117 | } | |
118 | mir::StatementKind::CopyNonOverlapping(box mir::CopyNonOverlapping { | |
119 | ref src, | |
120 | ref dst, | |
121 | ref count, | |
122 | }) => { | |
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 | |
127 | .layout | |
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())); | |
131 | ||
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()); | |
3dfed10e XL |
136 | bx |
137 | } | |
dfeec247 XL |
138 | mir::StatementKind::FakeRead(..) |
139 | | mir::StatementKind::Retag { .. } | |
140 | | mir::StatementKind::AscribeUserType(..) | |
141 | | mir::StatementKind::Nop => bx, | |
5bcae85e SL |
142 | } |
143 | } | |
92a42be0 | 144 | } |