| // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| use rustc::mir; |
| |
| use asm; |
| use builder::Builder; |
| |
| use super::FunctionCx; |
| use super::LocalRef; |
| |
| impl FunctionCx<'a, 'll, 'tcx> { |
| pub fn codegen_statement(&mut self, |
| bx: Builder<'a, 'll, 'tcx>, |
| statement: &mir::Statement<'tcx>) |
| -> Builder<'a, 'll, 'tcx> { |
| debug!("codegen_statement(statement={:?})", statement); |
| |
| self.set_debug_loc(&bx, statement.source_info); |
| match statement.kind { |
| mir::StatementKind::Assign(ref place, ref rvalue) => { |
| if let mir::Place::Local(index) = *place { |
| match self.locals[index] { |
| LocalRef::Place(cg_dest) => { |
| self.codegen_rvalue(bx, cg_dest, rvalue) |
| } |
| LocalRef::UnsizedPlace(cg_indirect_dest) => { |
| self.codegen_rvalue_unsized(bx, cg_indirect_dest, rvalue) |
| } |
| LocalRef::Operand(None) => { |
| let (bx, operand) = self.codegen_rvalue_operand(bx, rvalue); |
| self.locals[index] = LocalRef::Operand(Some(operand)); |
| bx |
| } |
| LocalRef::Operand(Some(op)) => { |
| if !op.layout.is_zst() { |
| span_bug!(statement.source_info.span, |
| "operand {:?} already assigned", |
| rvalue); |
| } |
| |
| // If the type is zero-sized, it's already been set here, |
| // but we still need to make sure we codegen the operand |
| self.codegen_rvalue_operand(bx, rvalue).0 |
| } |
| } |
| } else { |
| let cg_dest = self.codegen_place(&bx, place); |
| self.codegen_rvalue(bx, cg_dest, rvalue) |
| } |
| } |
| mir::StatementKind::SetDiscriminant{ref place, variant_index} => { |
| self.codegen_place(&bx, place) |
| .codegen_set_discr(&bx, variant_index); |
| bx |
| } |
| mir::StatementKind::StorageLive(local) => { |
| if let LocalRef::Place(cg_place) = self.locals[local] { |
| cg_place.storage_live(&bx); |
| } else if let LocalRef::UnsizedPlace(cg_indirect_place) = self.locals[local] { |
| cg_indirect_place.storage_live(&bx); |
| } |
| bx |
| } |
| mir::StatementKind::StorageDead(local) => { |
| if let LocalRef::Place(cg_place) = self.locals[local] { |
| cg_place.storage_dead(&bx); |
| } else if let LocalRef::UnsizedPlace(cg_indirect_place) = self.locals[local] { |
| cg_indirect_place.storage_dead(&bx); |
| } |
| bx |
| } |
| mir::StatementKind::InlineAsm { ref asm, ref outputs, ref inputs } => { |
| let outputs = outputs.iter().map(|output| { |
| self.codegen_place(&bx, output) |
| }).collect(); |
| |
| let input_vals = inputs.iter().map(|input| { |
| self.codegen_operand(&bx, input).immediate() |
| }).collect(); |
| |
| asm::codegen_inline_asm(&bx, asm, outputs, input_vals); |
| bx |
| } |
| mir::StatementKind::ReadForMatch(_) | |
| mir::StatementKind::EndRegion(_) | |
| mir::StatementKind::Validate(..) | |
| mir::StatementKind::UserAssertTy(..) | |
| mir::StatementKind::Nop => bx, |
| } |
| } |
| } |