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use build::Builder;
use rustc_const_math::{ConstInt, ConstUsize, ConstIsize};
use rustc::middle::const_val::ConstVal;
use rustc::ty::{self, Ty};
use rustc::mir::*;
use syntax::ast;
use syntax_pos::Span;
impl<'a, 'gcx, 'tcx> Builder<'a, 'gcx, 'tcx> {
pub fn temp(&mut self, ty: Ty<'tcx>) -> Lvalue<'tcx> {
let temp = self.local_decls.push(LocalDecl::new_temp(ty));
let lvalue = Lvalue::Local(temp);
debug!("temp: created temp {:?} with type {:?}",
lvalue, self.local_decls[temp].ty);
lvalue
}
pub fn literal_operand(&mut self,
span: Span,
ty: Ty<'tcx>,
literal: Literal<'tcx>)
-> Operand<'tcx> {
let constant = Constant {
span: span,
ty: ty,
literal: literal,
};
Operand::Constant(constant)
}
pub fn unit_rvalue(&mut self) -> Rvalue<'tcx> {
Rvalue::Aggregate(AggregateKind::Tuple, vec![])
}
pub fn zero_literal(&mut self, span: Span, ty: Ty<'tcx>) -> Operand<'tcx> {
let literal = match ty.sty {
ty::TyBool => {
self.hir.false_literal()
}
ty::TyChar => Literal::Value { value: ConstVal::Char('\0') },
ty::TyUint(ity) => {
let val = match ity {
ast::UintTy::U8 => ConstInt::U8(0),
ast::UintTy::U16 => ConstInt::U16(0),
ast::UintTy::U32 => ConstInt::U32(0),
ast::UintTy::U64 => ConstInt::U64(0),
ast::UintTy::U128 => ConstInt::U128(0),
ast::UintTy::Us => {
let uint_ty = self.hir.tcx().sess.target.uint_type;
let val = ConstUsize::new(0, uint_ty).unwrap();
ConstInt::Usize(val)
}
};
Literal::Value { value: ConstVal::Integral(val) }
}
ty::TyInt(ity) => {
let val = match ity {
ast::IntTy::I8 => ConstInt::I8(0),
ast::IntTy::I16 => ConstInt::I16(0),
ast::IntTy::I32 => ConstInt::I32(0),
ast::IntTy::I64 => ConstInt::I64(0),
ast::IntTy::I128 => ConstInt::I128(0),
ast::IntTy::Is => {
let int_ty = self.hir.tcx().sess.target.int_type;
let val = ConstIsize::new(0, int_ty).unwrap();
ConstInt::Isize(val)
}
};
Literal::Value { value: ConstVal::Integral(val) }
}
_ => {
span_bug!(span, "Invalid type for zero_literal: `{:?}`", ty)
}
};
self.literal_operand(span, ty, literal)
}
pub fn push_usize(&mut self,
block: BasicBlock,
source_info: SourceInfo,
value: u64)
-> Lvalue<'tcx> {
let usize_ty = self.hir.usize_ty();
let temp = self.temp(usize_ty);
self.cfg.push_assign_constant(
block, source_info, &temp,
Constant {
span: source_info.span,
ty: self.hir.usize_ty(),
literal: self.hir.usize_literal(value),
});
temp
}
}