#[cfg(not(stage0))]
pub fn discriminant_value<T>(v: &T) -> u64;
}
+
+#[cfg(not(stage0))]
+extern "rust-intrinsic" {
+ /// Performs an unchecked signed division, which results in undefined behavior,
+ /// in cases where y == 0, or x == int::MIN and y == -1
+ pub fn unchecked_sdiv<T>(x: T, y: T) -> T;
+ /// Performs an unchecked unsigned division, which results in undefined behavior,
+ /// in cases where y == 0
+ pub fn unchecked_udiv<T>(x: T, y: T) -> T;
+
+ /// Returns the remainder of an unchecked signed division, which results in
+ /// undefined behavior, in cases where y == 0, or x == int::MIN and y == -1
+ pub fn unchecked_urem<T>(x: T, y: T) -> T;
+ /// Returns the remainder of an unchecked signed division, which results in
+ /// undefined behavior, in cases where y == 0
+ pub fn unchecked_srem<T>(x: T, y: T) -> T;
+}
}
}
+/// Declare any llvm intrinsics that you might need
fn declare_intrinsic(ccx: &CrateContext, key: & &'static str) -> Option<ValueRef> {
macro_rules! ifn {
($name:expr, fn() -> $ret:expr) => (
ccx.sess().abort_if_errors();
}
+/// Remember to add all intrinsics here, in librustc_typeck/check/mod.rs,
+/// and in libcore/intrinsics.rs; if you need access to any llvm intrinsics,
+/// add them to librustc_trans/trans/context.rs
pub fn trans_intrinsic_call<'a, 'blk, 'tcx>(mut bcx: Block<'blk, 'tcx>,
node: ast::NodeId,
callee_ty: Ty<'tcx>,
llargs[1],
call_debug_location),
+ (_, "unchecked_udiv") => UDiv(bcx, llargs[0], llargs[1], call_debug_location),
+ (_, "unchecked_sdiv") => SDiv(bcx, llargs[0], llargs[1], call_debug_location),
+ (_, "unchecked_urem") => URem(bcx, llargs[0], llargs[1], call_debug_location),
+ (_, "unchecked_srem") => SRem(bcx, llargs[0], llargs[1], call_debug_location),
+
(_, "overflowing_add") => Add(bcx, llargs[0], llargs[1], call_debug_location),
(_, "overflowing_sub") => Sub(bcx, llargs[0], llargs[1], call_debug_location),
(_, "overflowing_mul") => Mul(bcx, llargs[0], llargs[1], call_debug_location),
}
}
+/// Remember to add all intrinsics here, in librustc_trans/trans/intrinsic.rs,
+/// and in libcore/intrinsics.rs
pub fn check_intrinsic_type(ccx: &CrateCtxt, it: &ast::ForeignItem) {
fn param<'a, 'tcx>(ccx: &CrateCtxt<'a, 'tcx>, n: u32) -> Ty<'tcx> {
let name = token::intern(&format!("P{}", n));
(0, vec!(tcx.types.u64, tcx.types.u64),
ty::mk_tup(tcx, vec!(tcx.types.u64, tcx.types.bool))),
+ "unchecked_udiv" | "unchecked_sdiv" | "unchecked_urem" | "unchecked_srem" =>
+ (1, vec![param(ccx, 0), param(ccx, 0)], param(ccx, 0)),
+
"overflowing_add" | "overflowing_sub" | "overflowing_mul" =>
(1, vec![param(ccx, 0), param(ccx, 0)], param(ccx, 0)),