3 use rustc::ty::subst::SubstsRef;
5 macro_rules! intrinsic_pat {
14 macro_rules! intrinsic_arg {
15 (c $fx:expr, $arg:ident) => {
18 (v $fx:expr, $arg:ident) => {
23 macro_rules! intrinsic_substs {
24 ($substs:expr, $index:expr,) => {};
25 ($substs:expr, $index:expr, $first:ident $(,$rest:ident)*) => {
26 let $first = $substs.type_at($index);
27 intrinsic_substs!($substs, $index+1, $($rest),*);
31 macro_rules! intrinsic_match {
32 ($fx:expr, $intrinsic:expr, $substs:expr, $args:expr, $(
33 $($name:tt)|+ $(if $cond:expr)?, $(<$($subst:ident),*>)? ($($a:ident $arg:ident),*) $content:block;
37 $(intrinsic_pat!($name))|* $(if $cond)? => {
38 #[allow(unused_parens, non_snake_case)]
41 intrinsic_substs!($substs, 0, $($subst),*);
43 if let [$($arg),*] = *$args {
45 $(intrinsic_arg!($a $fx, $arg)),*
47 #[warn(unused_parens, non_snake_case)]
52 bug!("wrong number of args for intrinsic {:?}", $intrinsic);
57 _ => unimpl!("unsupported intrinsic {}", $intrinsic),
62 macro_rules! atomic_binop_return_old {
63 ($fx:expr, $op:ident<$T:ident>($ptr:ident, $src:ident) -> $ret:ident) => {
64 let clif_ty = $fx.clif_type($T).unwrap();
65 let old = $fx.bcx.ins().load(clif_ty, MemFlags::new(), $ptr, 0);
66 let new = $fx.bcx.ins().band(old, $src);
67 $fx.bcx.ins().store(MemFlags::new(), new, $ptr, 0);
68 $ret.write_cvalue($fx, CValue::ByVal(old, $fx.layout_of($T)));
72 macro_rules! atomic_minmax {
73 ($fx:expr, $cc:expr, <$T:ident> ($ptr:ident, $src:ident) -> $ret:ident) => {
75 let clif_ty = $fx.clif_type($T).unwrap();
76 let old = $fx.bcx.ins().load(clif_ty, MemFlags::new(), $ptr, 0);
79 let is_eq = $fx.bcx.ins().icmp(IntCC::SignedGreaterThan, old, $src);
80 let new = crate::common::codegen_select(&mut $fx.bcx, is_eq, old, $src);
83 $fx.bcx.ins().store(MemFlags::new(), new, $ptr, 0);
85 let ret_val = CValue::ByVal(old, $ret.layout());
86 $ret.write_cvalue($fx, ret_val);
90 pub fn codegen_intrinsic_call<'a, 'tcx: 'a>(
91 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
93 substs: SubstsRef<'tcx>,
94 args: Vec<CValue<'tcx>>,
95 destination: Option<(CPlace<'tcx>, BasicBlock)>,
97 let intrinsic = fx.tcx.item_name(def_id).as_str();
98 let intrinsic = &intrinsic[..];
100 let ret = match destination {
101 Some((place, _)) => place,
103 // Insert non returning intrinsics here
106 trap_panic(&mut fx.bcx);
109 trap_unreachable(&mut fx.bcx);
111 _ => unimplemented!("unsupported instrinsic {}", intrinsic),
117 let u64_layout = fx.layout_of(fx.tcx.types.u64);
118 let usize_layout = fx.layout_of(fx.tcx.types.usize);
121 fx, intrinsic, substs, args,
124 likely | unlikely, (c a) {
125 ret.write_cvalue(fx, a);
128 fx.bcx.ins().debugtrap();
130 copy | copy_nonoverlapping, <elem_ty> (v src, v dst, v count) {
131 let elem_size: u64 = fx.layout_of(elem_ty).size.bytes();
135 .iconst(fx.pointer_type, elem_size as i64);
136 assert_eq!(args.len(), 3);
137 let byte_amount = fx.bcx.ins().imul(count, elem_size);
139 if intrinsic.ends_with("_nonoverlapping") {
140 fx.bcx.call_memcpy(fx.module.target_config(), dst, src, byte_amount);
142 fx.bcx.call_memmove(fx.module.target_config(), dst, src, byte_amount);
145 discriminant_value, (c val) {
146 let pointee_layout = fx.layout_of(val.layout().ty.builtin_deref(true).unwrap().ty);
147 let place = CPlace::Addr(val.load_scalar(fx), None, pointee_layout);
148 let discr = crate::base::trans_get_discriminant(fx, place, ret.layout());
149 ret.write_cvalue(fx, discr);
152 let size_of = fx.layout_of(T).size.bytes();
153 let size_of = CValue::const_val(fx, usize_layout.ty, size_of as i64);
154 ret.write_cvalue(fx, size_of);
156 size_of_val, <T> (c ptr) {
157 let layout = fx.layout_of(T);
158 let size = if layout.is_unsized() {
159 let (_ptr, info) = ptr.load_value_pair(fx);
160 let (size, _align) = crate::unsize::size_and_align_of_dst(fx, layout.ty, info);
166 .iconst(fx.pointer_type, layout.size.bytes() as i64)
168 ret.write_cvalue(fx, CValue::ByVal(size, usize_layout));
170 min_align_of, <T> () {
171 let min_align = fx.layout_of(T).align.abi.bytes();
172 let min_align = CValue::const_val(fx, usize_layout.ty, min_align as i64);
173 ret.write_cvalue(fx, min_align);
175 min_align_of_val, <T> (c ptr) {
176 let layout = fx.layout_of(T);
177 let align = if layout.is_unsized() {
178 let (_ptr, info) = ptr.load_value_pair(fx);
179 let (_size, align) = crate::unsize::size_and_align_of_dst(fx, layout.ty, info);
185 .iconst(fx.pointer_type, layout.align.abi.bytes() as i64)
187 ret.write_cvalue(fx, CValue::ByVal(align, usize_layout));
190 let type_id = fx.tcx.type_id_hash(T);
191 let type_id = CValue::const_val(fx, u64_layout.ty, type_id as i64);
192 ret.write_cvalue(fx, type_id);
194 _ if intrinsic.starts_with("unchecked_") || intrinsic == "exact_div", (c x, c y) {
195 let bin_op = match intrinsic {
196 "unchecked_div" | "exact_div" => BinOp::Div,
197 "unchecked_rem" => BinOp::Rem,
198 "unchecked_shl" => BinOp::Shl,
199 "unchecked_shr" => BinOp::Shr,
200 _ => unimplemented!("intrinsic {}", intrinsic),
202 let res = match ret.layout().ty.sty {
203 ty::Uint(_) => crate::base::trans_int_binop(
211 ty::Int(_) => crate::base::trans_int_binop(
221 ret.write_cvalue(fx, res);
223 _ if intrinsic.ends_with("_with_overflow"), <T> (c x, c y) {
224 assert_eq!(x.layout().ty, y.layout().ty);
225 let bin_op = match intrinsic {
226 "add_with_overflow" => BinOp::Add,
227 "sub_with_overflow" => BinOp::Sub,
228 "mul_with_overflow" => BinOp::Mul,
229 _ => unimplemented!("intrinsic {}", intrinsic),
231 let res = match T.sty {
232 ty::Uint(_) => crate::base::trans_checked_int_binop(
240 ty::Int(_) => crate::base::trans_checked_int_binop(
250 ret.write_cvalue(fx, res);
252 _ if intrinsic.starts_with("overflowing_"), <T> (c x, c y) {
253 assert_eq!(x.layout().ty, y.layout().ty);
254 let bin_op = match intrinsic {
255 "overflowing_add" => BinOp::Add,
256 "overflowing_sub" => BinOp::Sub,
257 "overflowing_mul" => BinOp::Mul,
258 _ => unimplemented!("intrinsic {}", intrinsic),
260 let res = match T.sty {
261 ty::Uint(_) => crate::base::trans_int_binop(
269 ty::Int(_) => crate::base::trans_int_binop(
279 ret.write_cvalue(fx, res);
281 rotate_left, <T>(v x, v y) {
282 let layout = fx.layout_of(T);
283 let res = fx.bcx.ins().rotl(x, y);
284 ret.write_cvalue(fx, CValue::ByVal(res, layout));
286 rotate_right, <T>(v x, v y) {
287 let layout = fx.layout_of(T);
288 let res = fx.bcx.ins().rotr(x, y);
289 ret.write_cvalue(fx, CValue::ByVal(res, layout));
292 // The only difference between offset and arith_offset is regarding UB. Because Cranelift
293 // doesn't have UB both are codegen'ed the same way
294 offset | arith_offset, (c base, v offset) {
295 let pointee_ty = base.layout().ty.builtin_deref(true).unwrap().ty;
296 let pointee_size = fx.layout_of(pointee_ty).size.bytes();
297 let ptr_diff = fx.bcx.ins().imul_imm(offset, pointee_size as i64);
298 let base_val = base.load_scalar(fx);
299 let res = fx.bcx.ins().iadd(base_val, ptr_diff);
300 ret.write_cvalue(fx, CValue::ByVal(res, args[0].layout()));
303 transmute, <src_ty, dst_ty> (c from) {
304 assert_eq!(from.layout().ty, src_ty);
305 let addr = from.force_stack(fx);
306 let dst_layout = fx.layout_of(dst_ty);
307 ret.write_cvalue(fx, CValue::ByRef(addr, dst_layout))
310 let layout = fx.layout_of(T);
311 let inited_place = CPlace::new_stack_slot(fx, T);
312 let addr = inited_place.to_addr(fx);
313 let zero_val = fx.bcx.ins().iconst(types::I8, 0);
314 let len_val = fx.bcx.ins().iconst(pointer_ty(fx.tcx), layout.size.bytes() as i64);
315 fx.bcx.call_memset(fx.module.target_config(), addr, zero_val, len_val);
317 let inited_val = inited_place.to_cvalue(fx);
318 ret.write_cvalue(fx, inited_val);
320 write_bytes, (c dst, v val, v count) {
321 let pointee_ty = dst.layout().ty.builtin_deref(true).unwrap().ty;
322 let pointee_size = fx.layout_of(pointee_ty).size.bytes();
323 let count = fx.bcx.ins().imul_imm(count, pointee_size as i64);
324 let dst_ptr = dst.load_scalar(fx);
325 fx.bcx.call_memset(fx.module.target_config(), dst_ptr, val, count);
328 let uninit_place = CPlace::new_stack_slot(fx, T);
329 let uninit_val = uninit_place.to_cvalue(fx);
330 ret.write_cvalue(fx, uninit_val);
332 ctlz | ctlz_nonzero, <T> (v arg) {
333 let res = CValue::ByVal(fx.bcx.ins().clz(arg), fx.layout_of(T));
334 ret.write_cvalue(fx, res);
336 cttz | cttz_nonzero, <T> (v arg) {
337 let res = CValue::ByVal(fx.bcx.ins().ctz(arg), fx.layout_of(T));
338 ret.write_cvalue(fx, res);
341 let res = CValue::ByVal(fx.bcx.ins().popcnt(arg), fx.layout_of(T));
342 ret.write_cvalue(fx, res);
344 bitreverse, <T> (v arg) {
345 let res = CValue::ByVal(fx.bcx.ins().bitrev(arg), fx.layout_of(T));
346 ret.write_cvalue(fx, res);
349 let needs_drop = if T.needs_drop(fx.tcx, ParamEnv::reveal_all()) {
354 let needs_drop = CValue::const_val(fx, fx.tcx.types.bool, needs_drop);
355 ret.write_cvalue(fx, needs_drop);
357 panic_if_uninhabited, <T> () {
358 if fx.layout_of(T).abi.is_uninhabited() {
359 crate::trap::trap_panic(&mut fx.bcx);
364 _ if intrinsic.starts_with("atomic_fence"), () {};
365 _ if intrinsic.starts_with("atomic_singlethreadfence"), () {};
366 _ if intrinsic.starts_with("atomic_load"), (c ptr) {
368 fx.layout_of(ptr.layout().ty.builtin_deref(true).unwrap().ty);
369 let val = CValue::ByRef(ptr.load_scalar(fx), inner_layout);
370 ret.write_cvalue(fx, val);
372 _ if intrinsic.starts_with("atomic_store"), (v ptr, c val) {
373 let dest = CPlace::Addr(ptr, None, val.layout());
374 dest.write_cvalue(fx, val);
376 _ if intrinsic.starts_with("atomic_xchg"), <T> (v ptr, c src) {
378 let clif_ty = fx.clif_type(T).unwrap();
379 let old = fx.bcx.ins().load(clif_ty, MemFlags::new(), ptr, 0);
380 ret.write_cvalue(fx, CValue::ByVal(old, fx.layout_of(T)));
383 let dest = CPlace::Addr(ptr, None, src.layout());
384 dest.write_cvalue(fx, src);
386 _ if intrinsic.starts_with("atomic_cxchg"), <T> (v ptr, v test_old, v new) { // both atomic_cxchg_* and atomic_cxchgweak_*
388 let clif_ty = fx.clif_type(T).unwrap();
389 let old = fx.bcx.ins().load(clif_ty, MemFlags::new(), ptr, 0);
392 let is_eq = fx.bcx.ins().icmp(IntCC::Equal, old, test_old);
393 let new = crate::common::codegen_select(&mut fx.bcx, is_eq, new, old); // Keep old if not equal to test_old
396 fx.bcx.ins().store(MemFlags::new(), new, ptr, 0);
398 let ret_val = CValue::ByValPair(old, fx.bcx.ins().bint(types::I8, is_eq), ret.layout());
399 ret.write_cvalue(fx, ret_val);
402 _ if intrinsic.starts_with("atomic_xadd"), <T> (v ptr, v amount) {
403 atomic_binop_return_old! (fx, iadd<T>(ptr, amount) -> ret);
405 _ if intrinsic.starts_with("atomic_xsub"), <T> (v ptr, v amount) {
406 atomic_binop_return_old! (fx, isub<T>(ptr, amount) -> ret);
408 _ if intrinsic.starts_with("atomic_and"), <T> (v ptr, v src) {
409 atomic_binop_return_old! (fx, band<T>(ptr, src) -> ret);
411 _ if intrinsic.starts_with("atomic_nand"), <T> (v ptr, v src) {
412 atomic_binop_return_old! (fx, bnand<T>(ptr, src) -> ret);
414 _ if intrinsic.starts_with("atomic_or"), <T> (v ptr, v src) {
415 atomic_binop_return_old! (fx, bor<T>(ptr, src) -> ret);
417 _ if intrinsic.starts_with("atomic_xor"), <T> (v ptr, v src) {
418 atomic_binop_return_old! (fx, bxor<T>(ptr, src) -> ret);
421 _ if intrinsic.starts_with("atomic_max"), <T> (v ptr, v src) {
422 atomic_minmax!(fx, IntCC::SignedGreaterThan, <T> (ptr, src) -> ret);
424 _ if intrinsic.starts_with("atomic_umax"), <T> (v ptr, v src) {
425 atomic_minmax!(fx, IntCC::UnsignedGreaterThan, <T> (ptr, src) -> ret);
427 _ if intrinsic.starts_with("atomic_min"), <T> (v ptr, v src) {
428 atomic_minmax!(fx, IntCC::SignedLessThan, <T> (ptr, src) -> ret);
430 _ if intrinsic.starts_with("atomic_umin"), <T> (v ptr, v src) {
431 atomic_minmax!(fx, IntCC::UnsignedLessThan, <T> (ptr, src) -> ret);
435 if let Some((_, dest)) = destination {
436 let ret_ebb = fx.get_ebb(dest);
437 fx.bcx.ins().jump(ret_ebb, &[]);
439 trap_unreachable(&mut fx.bcx);