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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);
}
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::AscribeUserType(..) |
mir::StatementKind::Nop => bx,
}
}
}