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Extract some intrinsics out of rustc_codegen_llvm
A significant amount of intrinsics do not actually need backend-specific behaviors to be implemented, instead relying on methods already in rustc_codegen_ssa. So, extract those methods out to rustc_codegen_ssa, so that each backend doesn't need to reimplement the same code.
This commit is contained in:
khyperia
parent
a874956d94
commit
21b0c1286a
@ -7,15 +7,12 @@ use crate::type_of::LayoutLlvmExt;
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use crate::va_arg::emit_va_arg;
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use crate::value::Value;
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use rustc_ast as ast;
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use rustc_codegen_ssa::base::{compare_simd_types, wants_msvc_seh};
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use rustc_codegen_ssa::common::span_invalid_monomorphization_error;
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use rustc_codegen_ssa::common::{IntPredicate, TypeKind};
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use rustc_codegen_ssa::glue;
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use rustc_codegen_ssa::mir::operand::{OperandRef, OperandValue};
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use rustc_codegen_ssa::mir::operand::OperandRef;
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use rustc_codegen_ssa::mir::place::PlaceRef;
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use rustc_codegen_ssa::traits::*;
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use rustc_codegen_ssa::MemFlags;
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use rustc_hir as hir;
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use rustc_middle::ty::layout::{FnAbiExt, HasTyCtxt};
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use rustc_middle::ty::{self, Ty};
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@ -71,8 +68,6 @@ fn get_simple_intrinsic(cx: &CodegenCx<'ll, '_>, name: Symbol) -> Option<&'ll Va
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sym::nearbyintf64 => "llvm.nearbyint.f64",
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sym::roundf32 => "llvm.round.f32",
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sym::roundf64 => "llvm.round.f64",
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sym::assume => "llvm.assume",
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sym::abort => "llvm.trap",
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_ => return None,
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};
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Some(cx.get_intrinsic(&llvm_name))
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@ -112,9 +107,6 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
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&args.iter().map(|arg| arg.immediate()).collect::<Vec<_>>(),
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None,
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),
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sym::unreachable => {
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return;
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}
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sym::likely => {
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let expect = self.get_intrinsic(&("llvm.expect.i1"));
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self.call(expect, &[args[0].immediate(), self.const_bool(true)], None)
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@ -137,8 +129,6 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
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let llfn = self.get_intrinsic(&("llvm.debugtrap"));
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self.call(llfn, &[], None)
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}
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sym::va_start => self.va_start(args[0].immediate()),
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sym::va_end => self.va_end(args[0].immediate()),
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sym::va_copy => {
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let intrinsic = self.cx().get_intrinsic(&("llvm.va_copy"));
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self.call(intrinsic, &[args[0].immediate(), args[1].immediate()], None)
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@ -169,123 +159,7 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
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_ => bug!("the va_arg intrinsic does not work with non-scalar types"),
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}
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}
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sym::size_of_val => {
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let tp_ty = substs.type_at(0);
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if let OperandValue::Pair(_, meta) = args[0].val {
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let (llsize, _) = glue::size_and_align_of_dst(self, tp_ty, Some(meta));
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llsize
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} else {
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self.const_usize(self.size_of(tp_ty).bytes())
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}
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}
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sym::min_align_of_val => {
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let tp_ty = substs.type_at(0);
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if let OperandValue::Pair(_, meta) = args[0].val {
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let (_, llalign) = glue::size_and_align_of_dst(self, tp_ty, Some(meta));
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llalign
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} else {
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self.const_usize(self.align_of(tp_ty).bytes())
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}
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}
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sym::size_of
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| sym::pref_align_of
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| sym::min_align_of
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| sym::needs_drop
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| sym::type_id
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| sym::type_name
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| sym::variant_count => {
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let value = self
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.tcx
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.const_eval_instance(ty::ParamEnv::reveal_all(), instance, None)
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.unwrap();
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OperandRef::from_const(self, value, ret_ty).immediate_or_packed_pair(self)
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}
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// Effectively no-op
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sym::forget => {
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return;
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}
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sym::offset => {
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let ptr = args[0].immediate();
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let offset = args[1].immediate();
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self.inbounds_gep(ptr, &[offset])
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}
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sym::arith_offset => {
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let ptr = args[0].immediate();
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let offset = args[1].immediate();
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self.gep(ptr, &[offset])
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}
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sym::copy_nonoverlapping => {
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copy_intrinsic(
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self,
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false,
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false,
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substs.type_at(0),
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args[1].immediate(),
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args[0].immediate(),
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args[2].immediate(),
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);
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return;
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}
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sym::copy => {
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copy_intrinsic(
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self,
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true,
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false,
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substs.type_at(0),
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args[1].immediate(),
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args[0].immediate(),
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args[2].immediate(),
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);
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return;
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}
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sym::write_bytes => {
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memset_intrinsic(
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self,
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false,
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substs.type_at(0),
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args[0].immediate(),
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args[1].immediate(),
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args[2].immediate(),
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);
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return;
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}
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sym::volatile_copy_nonoverlapping_memory => {
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copy_intrinsic(
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self,
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false,
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true,
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substs.type_at(0),
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args[0].immediate(),
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args[1].immediate(),
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args[2].immediate(),
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);
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return;
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}
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sym::volatile_copy_memory => {
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copy_intrinsic(
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self,
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true,
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true,
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substs.type_at(0),
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args[0].immediate(),
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args[1].immediate(),
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args[2].immediate(),
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);
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return;
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}
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sym::volatile_set_memory => {
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memset_intrinsic(
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self,
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true,
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substs.type_at(0),
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args[0].immediate(),
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args[1].immediate(),
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args[2].immediate(),
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);
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return;
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}
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sym::volatile_load | sym::unaligned_volatile_load => {
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let tp_ty = substs.type_at(0);
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let mut ptr = args[0].immediate();
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@ -343,20 +217,6 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
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| sym::ctpop
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| sym::bswap
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| sym::bitreverse
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| sym::add_with_overflow
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| sym::sub_with_overflow
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| sym::mul_with_overflow
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| sym::wrapping_add
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| sym::wrapping_sub
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| sym::wrapping_mul
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| sym::unchecked_div
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| sym::unchecked_rem
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| sym::unchecked_shl
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| sym::unchecked_shr
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| sym::unchecked_add
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| sym::unchecked_sub
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| sym::unchecked_mul
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| sym::exact_div
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| sym::rotate_left
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| sym::rotate_right
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| sym::saturating_add
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@ -396,84 +256,6 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
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&[args[0].immediate()],
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None,
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),
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sym::add_with_overflow
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| sym::sub_with_overflow
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| sym::mul_with_overflow => {
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let intrinsic = format!(
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"llvm.{}{}.with.overflow.i{}",
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if signed { 's' } else { 'u' },
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&name_str[..3],
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width
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);
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let llfn = self.get_intrinsic(&intrinsic);
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// Convert `i1` to a `bool`, and write it to the out parameter
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let pair =
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self.call(llfn, &[args[0].immediate(), args[1].immediate()], None);
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let val = self.extract_value(pair, 0);
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let overflow = self.extract_value(pair, 1);
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let overflow = self.zext(overflow, self.type_bool());
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let dest = result.project_field(self, 0);
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self.store(val, dest.llval, dest.align);
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let dest = result.project_field(self, 1);
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self.store(overflow, dest.llval, dest.align);
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return;
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}
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sym::wrapping_add => self.add(args[0].immediate(), args[1].immediate()),
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sym::wrapping_sub => self.sub(args[0].immediate(), args[1].immediate()),
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sym::wrapping_mul => self.mul(args[0].immediate(), args[1].immediate()),
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sym::exact_div => {
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if signed {
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self.exactsdiv(args[0].immediate(), args[1].immediate())
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} else {
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self.exactudiv(args[0].immediate(), args[1].immediate())
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}
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}
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sym::unchecked_div => {
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if signed {
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self.sdiv(args[0].immediate(), args[1].immediate())
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} else {
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self.udiv(args[0].immediate(), args[1].immediate())
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}
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}
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sym::unchecked_rem => {
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if signed {
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self.srem(args[0].immediate(), args[1].immediate())
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} else {
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self.urem(args[0].immediate(), args[1].immediate())
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}
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}
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sym::unchecked_shl => self.shl(args[0].immediate(), args[1].immediate()),
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sym::unchecked_shr => {
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if signed {
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self.ashr(args[0].immediate(), args[1].immediate())
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} else {
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self.lshr(args[0].immediate(), args[1].immediate())
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}
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}
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sym::unchecked_add => {
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if signed {
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self.unchecked_sadd(args[0].immediate(), args[1].immediate())
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} else {
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self.unchecked_uadd(args[0].immediate(), args[1].immediate())
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}
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}
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sym::unchecked_sub => {
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if signed {
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self.unchecked_ssub(args[0].immediate(), args[1].immediate())
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} else {
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self.unchecked_usub(args[0].immediate(), args[1].immediate())
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}
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}
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sym::unchecked_mul => {
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if signed {
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self.unchecked_smul(args[0].immediate(), args[1].immediate())
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} else {
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self.unchecked_umul(args[0].immediate(), args[1].immediate())
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}
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}
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sym::rotate_left | sym::rotate_right => {
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let is_left = name == sym::rotate_left;
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let val = args[0].immediate();
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@ -513,75 +295,6 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
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}
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}
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}
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sym::fadd_fast | sym::fsub_fast | sym::fmul_fast | sym::fdiv_fast | sym::frem_fast => {
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match float_type_width(arg_tys[0]) {
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Some(_width) => match name {
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sym::fadd_fast => self.fadd_fast(args[0].immediate(), args[1].immediate()),
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sym::fsub_fast => self.fsub_fast(args[0].immediate(), args[1].immediate()),
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sym::fmul_fast => self.fmul_fast(args[0].immediate(), args[1].immediate()),
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sym::fdiv_fast => self.fdiv_fast(args[0].immediate(), args[1].immediate()),
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sym::frem_fast => self.frem_fast(args[0].immediate(), args[1].immediate()),
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_ => bug!(),
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},
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None => {
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span_invalid_monomorphization_error(
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tcx.sess,
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span,
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&format!(
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"invalid monomorphization of `{}` intrinsic: \
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expected basic float type, found `{}`",
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name, arg_tys[0]
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),
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);
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return;
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}
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}
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}
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sym::float_to_int_unchecked => {
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if float_type_width(arg_tys[0]).is_none() {
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span_invalid_monomorphization_error(
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tcx.sess,
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span,
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&format!(
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"invalid monomorphization of `float_to_int_unchecked` \
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intrinsic: expected basic float type, \
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found `{}`",
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arg_tys[0]
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),
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);
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return;
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}
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let (width, signed) = match int_type_width_signed(ret_ty, self.cx) {
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Some(pair) => pair,
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None => {
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span_invalid_monomorphization_error(
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tcx.sess,
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span,
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&format!(
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"invalid monomorphization of `float_to_int_unchecked` \
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intrinsic: expected basic integer type, \
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found `{}`",
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ret_ty
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),
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);
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return;
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}
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};
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if signed {
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self.fptosi(args[0].immediate(), self.cx.type_ix(width))
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} else {
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self.fptoui(args[0].immediate(), self.cx.type_ix(width))
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}
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}
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sym::discriminant_value => {
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if ret_ty.is_integral() {
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args[0].deref(self.cx()).codegen_get_discr(self, ret_ty)
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} else {
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span_bug!(span, "Invalid discriminant type for `{:?}`", arg_tys[0])
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}
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}
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_ if name_str.starts_with("simd_") => {
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match generic_simd_intrinsic(self, name, callee_ty, args, ret_ty, llret_ty, span) {
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@ -589,174 +302,6 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
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Err(()) => return,
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}
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}
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// This requires that atomic intrinsics follow a specific naming pattern:
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// "atomic_<operation>[_<ordering>]", and no ordering means SeqCst
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name if name_str.starts_with("atomic_") => {
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use rustc_codegen_ssa::common::AtomicOrdering::*;
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use rustc_codegen_ssa::common::{AtomicRmwBinOp, SynchronizationScope};
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let split: Vec<&str> = name_str.split('_').collect();
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let is_cxchg = split[1] == "cxchg" || split[1] == "cxchgweak";
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let (order, failorder) = match split.len() {
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2 => (SequentiallyConsistent, SequentiallyConsistent),
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3 => match split[2] {
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"unordered" => (Unordered, Unordered),
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"relaxed" => (Monotonic, Monotonic),
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"acq" => (Acquire, Acquire),
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"rel" => (Release, Monotonic),
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"acqrel" => (AcquireRelease, Acquire),
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"failrelaxed" if is_cxchg => (SequentiallyConsistent, Monotonic),
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"failacq" if is_cxchg => (SequentiallyConsistent, Acquire),
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_ => self.sess().fatal("unknown ordering in atomic intrinsic"),
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},
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4 => match (split[2], split[3]) {
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("acq", "failrelaxed") if is_cxchg => (Acquire, Monotonic),
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("acqrel", "failrelaxed") if is_cxchg => (AcquireRelease, Monotonic),
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_ => self.sess().fatal("unknown ordering in atomic intrinsic"),
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},
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_ => self.sess().fatal("Atomic intrinsic not in correct format"),
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};
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let invalid_monomorphization = |ty| {
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span_invalid_monomorphization_error(
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tcx.sess,
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span,
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&format!(
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"invalid monomorphization of `{}` intrinsic: \
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expected basic integer type, found `{}`",
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name, ty
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),
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);
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};
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match split[1] {
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"cxchg" | "cxchgweak" => {
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let ty = substs.type_at(0);
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if int_type_width_signed(ty, self).is_some() {
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let weak = split[1] == "cxchgweak";
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let pair = self.atomic_cmpxchg(
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args[0].immediate(),
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args[1].immediate(),
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args[2].immediate(),
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order,
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failorder,
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weak,
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);
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let val = self.extract_value(pair, 0);
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let success = self.extract_value(pair, 1);
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let success = self.zext(success, self.type_bool());
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let dest = result.project_field(self, 0);
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self.store(val, dest.llval, dest.align);
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let dest = result.project_field(self, 1);
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self.store(success, dest.llval, dest.align);
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return;
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} else {
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return invalid_monomorphization(ty);
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}
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}
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"load" => {
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let ty = substs.type_at(0);
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if int_type_width_signed(ty, self).is_some() {
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let size = self.size_of(ty);
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self.atomic_load(args[0].immediate(), order, size)
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} else {
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return invalid_monomorphization(ty);
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}
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}
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"store" => {
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let ty = substs.type_at(0);
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if int_type_width_signed(ty, self).is_some() {
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let size = self.size_of(ty);
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self.atomic_store(
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args[1].immediate(),
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args[0].immediate(),
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order,
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size,
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);
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return;
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} else {
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return invalid_monomorphization(ty);
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}
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}
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|
||||
"fence" => {
|
||||
self.atomic_fence(order, SynchronizationScope::CrossThread);
|
||||
return;
|
||||
}
|
||||
|
||||
"singlethreadfence" => {
|
||||
self.atomic_fence(order, SynchronizationScope::SingleThread);
|
||||
return;
|
||||
}
|
||||
|
||||
// These are all AtomicRMW ops
|
||||
op => {
|
||||
let atom_op = match op {
|
||||
"xchg" => AtomicRmwBinOp::AtomicXchg,
|
||||
"xadd" => AtomicRmwBinOp::AtomicAdd,
|
||||
"xsub" => AtomicRmwBinOp::AtomicSub,
|
||||
"and" => AtomicRmwBinOp::AtomicAnd,
|
||||
"nand" => AtomicRmwBinOp::AtomicNand,
|
||||
"or" => AtomicRmwBinOp::AtomicOr,
|
||||
"xor" => AtomicRmwBinOp::AtomicXor,
|
||||
"max" => AtomicRmwBinOp::AtomicMax,
|
||||
"min" => AtomicRmwBinOp::AtomicMin,
|
||||
"umax" => AtomicRmwBinOp::AtomicUMax,
|
||||
"umin" => AtomicRmwBinOp::AtomicUMin,
|
||||
_ => self.sess().fatal("unknown atomic operation"),
|
||||
};
|
||||
|
||||
let ty = substs.type_at(0);
|
||||
if int_type_width_signed(ty, self).is_some() {
|
||||
self.atomic_rmw(
|
||||
atom_op,
|
||||
args[0].immediate(),
|
||||
args[1].immediate(),
|
||||
order,
|
||||
)
|
||||
} else {
|
||||
return invalid_monomorphization(ty);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
sym::nontemporal_store => {
|
||||
let dst = args[0].deref(self.cx());
|
||||
args[1].val.nontemporal_store(self, dst);
|
||||
return;
|
||||
}
|
||||
|
||||
sym::ptr_guaranteed_eq | sym::ptr_guaranteed_ne => {
|
||||
let a = args[0].immediate();
|
||||
let b = args[1].immediate();
|
||||
if name == sym::ptr_guaranteed_eq {
|
||||
self.icmp(IntPredicate::IntEQ, a, b)
|
||||
} else {
|
||||
self.icmp(IntPredicate::IntNE, a, b)
|
||||
}
|
||||
}
|
||||
|
||||
sym::ptr_offset_from => {
|
||||
let ty = substs.type_at(0);
|
||||
let pointee_size = self.size_of(ty);
|
||||
|
||||
// This is the same sequence that Clang emits for pointer subtraction.
|
||||
// It can be neither `nsw` nor `nuw` because the input is treated as
|
||||
// unsigned but then the output is treated as signed, so neither works.
|
||||
let a = args[0].immediate();
|
||||
let b = args[1].immediate();
|
||||
let a = self.ptrtoint(a, self.type_isize());
|
||||
let b = self.ptrtoint(b, self.type_isize());
|
||||
let d = self.sub(a, b);
|
||||
let pointee_size = self.const_usize(pointee_size.bytes());
|
||||
// this is where the signed magic happens (notice the `s` in `exactsdiv`)
|
||||
self.exactsdiv(d, pointee_size)
|
||||
}
|
||||
|
||||
_ => bug!("unknown intrinsic '{}'", name),
|
||||
};
|
||||
@ -807,39 +352,6 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
|
||||
}
|
||||
}
|
||||
|
||||
fn copy_intrinsic(
|
||||
bx: &mut Builder<'a, 'll, 'tcx>,
|
||||
allow_overlap: bool,
|
||||
volatile: bool,
|
||||
ty: Ty<'tcx>,
|
||||
dst: &'ll Value,
|
||||
src: &'ll Value,
|
||||
count: &'ll Value,
|
||||
) {
|
||||
let (size, align) = bx.size_and_align_of(ty);
|
||||
let size = bx.mul(bx.const_usize(size.bytes()), count);
|
||||
let flags = if volatile { MemFlags::VOLATILE } else { MemFlags::empty() };
|
||||
if allow_overlap {
|
||||
bx.memmove(dst, align, src, align, size, flags);
|
||||
} else {
|
||||
bx.memcpy(dst, align, src, align, size, flags);
|
||||
}
|
||||
}
|
||||
|
||||
fn memset_intrinsic(
|
||||
bx: &mut Builder<'a, 'll, 'tcx>,
|
||||
volatile: bool,
|
||||
ty: Ty<'tcx>,
|
||||
dst: &'ll Value,
|
||||
val: &'ll Value,
|
||||
count: &'ll Value,
|
||||
) {
|
||||
let (size, align) = bx.size_and_align_of(ty);
|
||||
let size = bx.mul(bx.const_usize(size.bytes()), count);
|
||||
let flags = if volatile { MemFlags::VOLATILE } else { MemFlags::empty() };
|
||||
bx.memset(dst, val, size, align, flags);
|
||||
}
|
||||
|
||||
fn try_intrinsic(
|
||||
bx: &mut Builder<'a, 'll, 'tcx>,
|
||||
try_func: &'ll Value,
|
||||
@ -2205,37 +1717,12 @@ unsupported {} from `{}` with element `{}` of size `{}` to `{}`"#,
|
||||
// stuffs.
|
||||
fn int_type_width_signed(ty: Ty<'_>, cx: &CodegenCx<'_, '_>) -> Option<(u64, bool)> {
|
||||
match ty.kind() {
|
||||
ty::Int(t) => Some((
|
||||
match t {
|
||||
ast::IntTy::Isize => u64::from(cx.tcx.sess.target.ptr_width),
|
||||
ast::IntTy::I8 => 8,
|
||||
ast::IntTy::I16 => 16,
|
||||
ast::IntTy::I32 => 32,
|
||||
ast::IntTy::I64 => 64,
|
||||
ast::IntTy::I128 => 128,
|
||||
},
|
||||
true,
|
||||
)),
|
||||
ty::Uint(t) => Some((
|
||||
match t {
|
||||
ast::UintTy::Usize => u64::from(cx.tcx.sess.target.ptr_width),
|
||||
ast::UintTy::U8 => 8,
|
||||
ast::UintTy::U16 => 16,
|
||||
ast::UintTy::U32 => 32,
|
||||
ast::UintTy::U64 => 64,
|
||||
ast::UintTy::U128 => 128,
|
||||
},
|
||||
false,
|
||||
)),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
|
||||
// Returns the width of a float Ty
|
||||
// Returns None if the type is not a float
|
||||
fn float_type_width(ty: Ty<'_>) -> Option<u64> {
|
||||
match ty.kind() {
|
||||
ty::Float(t) => Some(t.bit_width()),
|
||||
ty::Int(t) => {
|
||||
Some((t.bit_width().unwrap_or(u64::from(cx.tcx.sess.target.ptr_width)), true))
|
||||
}
|
||||
ty::Uint(t) => {
|
||||
Some((t.bit_width().unwrap_or(u64::from(cx.tcx.sess.target.ptr_width)), false))
|
||||
}
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
|
||||
@ -687,7 +687,8 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
|
||||
})
|
||||
.collect();
|
||||
|
||||
bx.codegen_intrinsic_call(
|
||||
Self::codegen_intrinsic_call(
|
||||
&mut bx,
|
||||
*instance.as_ref().unwrap(),
|
||||
&fn_abi,
|
||||
&args,
|
||||
|
||||
596
compiler/rustc_codegen_ssa/src/mir/intrinsic.rs
Normal file
596
compiler/rustc_codegen_ssa/src/mir/intrinsic.rs
Normal file
@ -0,0 +1,596 @@
|
||||
use super::operand::{OperandRef, OperandValue};
|
||||
use super::place::PlaceRef;
|
||||
use super::FunctionCx;
|
||||
use crate::common::{span_invalid_monomorphization_error, IntPredicate};
|
||||
use crate::glue;
|
||||
use crate::traits::*;
|
||||
use crate::MemFlags;
|
||||
|
||||
use rustc_middle::ty::{self, Ty, TyCtxt};
|
||||
use rustc_span::{sym, Span};
|
||||
use rustc_target::abi::call::{FnAbi, PassMode};
|
||||
|
||||
fn copy_intrinsic<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
|
||||
bx: &mut Bx,
|
||||
allow_overlap: bool,
|
||||
volatile: bool,
|
||||
ty: Ty<'tcx>,
|
||||
dst: Bx::Value,
|
||||
src: Bx::Value,
|
||||
count: Bx::Value,
|
||||
) {
|
||||
let layout = bx.layout_of(ty);
|
||||
let size = layout.size;
|
||||
let align = layout.align.abi;
|
||||
let size = bx.mul(bx.const_usize(size.bytes()), count);
|
||||
let flags = if volatile { MemFlags::VOLATILE } else { MemFlags::empty() };
|
||||
if allow_overlap {
|
||||
bx.memmove(dst, align, src, align, size, flags);
|
||||
} else {
|
||||
bx.memcpy(dst, align, src, align, size, flags);
|
||||
}
|
||||
}
|
||||
|
||||
fn memset_intrinsic<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
|
||||
bx: &mut Bx,
|
||||
volatile: bool,
|
||||
ty: Ty<'tcx>,
|
||||
dst: Bx::Value,
|
||||
val: Bx::Value,
|
||||
count: Bx::Value,
|
||||
) {
|
||||
let layout = bx.layout_of(ty);
|
||||
let size = layout.size;
|
||||
let align = layout.align.abi;
|
||||
let size = bx.mul(bx.const_usize(size.bytes()), count);
|
||||
let flags = if volatile { MemFlags::VOLATILE } else { MemFlags::empty() };
|
||||
bx.memset(dst, val, size, align, flags);
|
||||
}
|
||||
|
||||
impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
|
||||
pub fn codegen_intrinsic_call(
|
||||
bx: &mut Bx,
|
||||
instance: ty::Instance<'tcx>,
|
||||
fn_abi: &FnAbi<'tcx, Ty<'tcx>>,
|
||||
args: &[OperandRef<'tcx, Bx::Value>],
|
||||
llresult: Bx::Value,
|
||||
span: Span,
|
||||
) {
|
||||
let callee_ty = instance.ty(bx.tcx(), ty::ParamEnv::reveal_all());
|
||||
|
||||
let (def_id, substs) = match *callee_ty.kind() {
|
||||
ty::FnDef(def_id, substs) => (def_id, substs),
|
||||
_ => bug!("expected fn item type, found {}", callee_ty),
|
||||
};
|
||||
|
||||
let sig = callee_ty.fn_sig(bx.tcx());
|
||||
let sig = bx.tcx().normalize_erasing_late_bound_regions(ty::ParamEnv::reveal_all(), &sig);
|
||||
let arg_tys = sig.inputs();
|
||||
let ret_ty = sig.output();
|
||||
let name = bx.tcx().item_name(def_id);
|
||||
let name_str = &*name.as_str();
|
||||
|
||||
let llret_ty = bx.backend_type(bx.layout_of(ret_ty));
|
||||
let result = PlaceRef::new_sized(llresult, fn_abi.ret.layout);
|
||||
|
||||
let llval = match name {
|
||||
sym::assume => {
|
||||
bx.assume(args[0].immediate());
|
||||
return;
|
||||
}
|
||||
sym::abort => {
|
||||
bx.abort();
|
||||
return;
|
||||
}
|
||||
|
||||
sym::unreachable => {
|
||||
return;
|
||||
}
|
||||
sym::va_start => bx.va_start(args[0].immediate()),
|
||||
sym::va_end => bx.va_end(args[0].immediate()),
|
||||
sym::size_of_val => {
|
||||
let tp_ty = substs.type_at(0);
|
||||
if let OperandValue::Pair(_, meta) = args[0].val {
|
||||
let (llsize, _) = glue::size_and_align_of_dst(bx, tp_ty, Some(meta));
|
||||
llsize
|
||||
} else {
|
||||
bx.const_usize(bx.layout_of(tp_ty).size.bytes())
|
||||
}
|
||||
}
|
||||
sym::min_align_of_val => {
|
||||
let tp_ty = substs.type_at(0);
|
||||
if let OperandValue::Pair(_, meta) = args[0].val {
|
||||
let (_, llalign) = glue::size_and_align_of_dst(bx, tp_ty, Some(meta));
|
||||
llalign
|
||||
} else {
|
||||
bx.const_usize(bx.layout_of(tp_ty).align.abi.bytes())
|
||||
}
|
||||
}
|
||||
sym::size_of
|
||||
| sym::pref_align_of
|
||||
| sym::min_align_of
|
||||
| sym::needs_drop
|
||||
| sym::type_id
|
||||
| sym::type_name
|
||||
| sym::variant_count => {
|
||||
let value = bx
|
||||
.tcx()
|
||||
.const_eval_instance(ty::ParamEnv::reveal_all(), instance, None)
|
||||
.unwrap();
|
||||
OperandRef::from_const(bx, value, ret_ty).immediate_or_packed_pair(bx)
|
||||
}
|
||||
// Effectively no-op
|
||||
sym::forget => {
|
||||
return;
|
||||
}
|
||||
sym::offset => {
|
||||
let ptr = args[0].immediate();
|
||||
let offset = args[1].immediate();
|
||||
bx.inbounds_gep(ptr, &[offset])
|
||||
}
|
||||
sym::arith_offset => {
|
||||
let ptr = args[0].immediate();
|
||||
let offset = args[1].immediate();
|
||||
bx.gep(ptr, &[offset])
|
||||
}
|
||||
|
||||
sym::copy_nonoverlapping => {
|
||||
copy_intrinsic(
|
||||
bx,
|
||||
false,
|
||||
false,
|
||||
substs.type_at(0),
|
||||
args[1].immediate(),
|
||||
args[0].immediate(),
|
||||
args[2].immediate(),
|
||||
);
|
||||
return;
|
||||
}
|
||||
sym::copy => {
|
||||
copy_intrinsic(
|
||||
bx,
|
||||
true,
|
||||
false,
|
||||
substs.type_at(0),
|
||||
args[1].immediate(),
|
||||
args[0].immediate(),
|
||||
args[2].immediate(),
|
||||
);
|
||||
return;
|
||||
}
|
||||
sym::write_bytes => {
|
||||
memset_intrinsic(
|
||||
bx,
|
||||
false,
|
||||
substs.type_at(0),
|
||||
args[0].immediate(),
|
||||
args[1].immediate(),
|
||||
args[2].immediate(),
|
||||
);
|
||||
return;
|
||||
}
|
||||
|
||||
sym::volatile_copy_nonoverlapping_memory => {
|
||||
copy_intrinsic(
|
||||
bx,
|
||||
false,
|
||||
true,
|
||||
substs.type_at(0),
|
||||
args[0].immediate(),
|
||||
args[1].immediate(),
|
||||
args[2].immediate(),
|
||||
);
|
||||
return;
|
||||
}
|
||||
sym::volatile_copy_memory => {
|
||||
copy_intrinsic(
|
||||
bx,
|
||||
true,
|
||||
true,
|
||||
substs.type_at(0),
|
||||
args[0].immediate(),
|
||||
args[1].immediate(),
|
||||
args[2].immediate(),
|
||||
);
|
||||
return;
|
||||
}
|
||||
sym::volatile_set_memory => {
|
||||
memset_intrinsic(
|
||||
bx,
|
||||
true,
|
||||
substs.type_at(0),
|
||||
args[0].immediate(),
|
||||
args[1].immediate(),
|
||||
args[2].immediate(),
|
||||
);
|
||||
return;
|
||||
}
|
||||
sym::volatile_store => {
|
||||
let dst = args[0].deref(bx.cx());
|
||||
args[1].val.volatile_store(bx, dst);
|
||||
return;
|
||||
}
|
||||
sym::unaligned_volatile_store => {
|
||||
let dst = args[0].deref(bx.cx());
|
||||
args[1].val.unaligned_volatile_store(bx, dst);
|
||||
return;
|
||||
}
|
||||
sym::add_with_overflow
|
||||
| sym::sub_with_overflow
|
||||
| sym::mul_with_overflow
|
||||
| sym::wrapping_add
|
||||
| sym::wrapping_sub
|
||||
| sym::wrapping_mul
|
||||
| sym::unchecked_div
|
||||
| sym::unchecked_rem
|
||||
| sym::unchecked_shl
|
||||
| sym::unchecked_shr
|
||||
| sym::unchecked_add
|
||||
| sym::unchecked_sub
|
||||
| sym::unchecked_mul
|
||||
| sym::exact_div => {
|
||||
let ty = arg_tys[0];
|
||||
match int_type_width_signed(ty, bx.tcx()) {
|
||||
Some((_width, signed)) => match name {
|
||||
sym::add_with_overflow
|
||||
| sym::sub_with_overflow
|
||||
| sym::mul_with_overflow => {
|
||||
let op = match name {
|
||||
sym::add_with_overflow => OverflowOp::Add,
|
||||
sym::sub_with_overflow => OverflowOp::Sub,
|
||||
sym::mul_with_overflow => OverflowOp::Mul,
|
||||
_ => bug!(),
|
||||
};
|
||||
let (val, overflow) =
|
||||
bx.checked_binop(op, ty, args[0].immediate(), args[1].immediate());
|
||||
// Convert `i1` to a `bool`, and write it to the out parameter
|
||||
let val = bx.from_immediate(val);
|
||||
let overflow = bx.from_immediate(overflow);
|
||||
|
||||
let dest = result.project_field(bx, 0);
|
||||
bx.store(val, dest.llval, dest.align);
|
||||
let dest = result.project_field(bx, 1);
|
||||
bx.store(overflow, dest.llval, dest.align);
|
||||
|
||||
return;
|
||||
}
|
||||
sym::wrapping_add => bx.add(args[0].immediate(), args[1].immediate()),
|
||||
sym::wrapping_sub => bx.sub(args[0].immediate(), args[1].immediate()),
|
||||
sym::wrapping_mul => bx.mul(args[0].immediate(), args[1].immediate()),
|
||||
sym::exact_div => {
|
||||
if signed {
|
||||
bx.exactsdiv(args[0].immediate(), args[1].immediate())
|
||||
} else {
|
||||
bx.exactudiv(args[0].immediate(), args[1].immediate())
|
||||
}
|
||||
}
|
||||
sym::unchecked_div => {
|
||||
if signed {
|
||||
bx.sdiv(args[0].immediate(), args[1].immediate())
|
||||
} else {
|
||||
bx.udiv(args[0].immediate(), args[1].immediate())
|
||||
}
|
||||
}
|
||||
sym::unchecked_rem => {
|
||||
if signed {
|
||||
bx.srem(args[0].immediate(), args[1].immediate())
|
||||
} else {
|
||||
bx.urem(args[0].immediate(), args[1].immediate())
|
||||
}
|
||||
}
|
||||
sym::unchecked_shl => bx.shl(args[0].immediate(), args[1].immediate()),
|
||||
sym::unchecked_shr => {
|
||||
if signed {
|
||||
bx.ashr(args[0].immediate(), args[1].immediate())
|
||||
} else {
|
||||
bx.lshr(args[0].immediate(), args[1].immediate())
|
||||
}
|
||||
}
|
||||
sym::unchecked_add => {
|
||||
if signed {
|
||||
bx.unchecked_sadd(args[0].immediate(), args[1].immediate())
|
||||
} else {
|
||||
bx.unchecked_uadd(args[0].immediate(), args[1].immediate())
|
||||
}
|
||||
}
|
||||
sym::unchecked_sub => {
|
||||
if signed {
|
||||
bx.unchecked_ssub(args[0].immediate(), args[1].immediate())
|
||||
} else {
|
||||
bx.unchecked_usub(args[0].immediate(), args[1].immediate())
|
||||
}
|
||||
}
|
||||
sym::unchecked_mul => {
|
||||
if signed {
|
||||
bx.unchecked_smul(args[0].immediate(), args[1].immediate())
|
||||
} else {
|
||||
bx.unchecked_umul(args[0].immediate(), args[1].immediate())
|
||||
}
|
||||
}
|
||||
_ => bug!(),
|
||||
},
|
||||
None => {
|
||||
span_invalid_monomorphization_error(
|
||||
bx.tcx().sess,
|
||||
span,
|
||||
&format!(
|
||||
"invalid monomorphization of `{}` intrinsic: \
|
||||
expected basic integer type, found `{}`",
|
||||
name, ty
|
||||
),
|
||||
);
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
sym::fadd_fast | sym::fsub_fast | sym::fmul_fast | sym::fdiv_fast | sym::frem_fast => {
|
||||
match float_type_width(arg_tys[0]) {
|
||||
Some(_width) => match name {
|
||||
sym::fadd_fast => bx.fadd_fast(args[0].immediate(), args[1].immediate()),
|
||||
sym::fsub_fast => bx.fsub_fast(args[0].immediate(), args[1].immediate()),
|
||||
sym::fmul_fast => bx.fmul_fast(args[0].immediate(), args[1].immediate()),
|
||||
sym::fdiv_fast => bx.fdiv_fast(args[0].immediate(), args[1].immediate()),
|
||||
sym::frem_fast => bx.frem_fast(args[0].immediate(), args[1].immediate()),
|
||||
_ => bug!(),
|
||||
},
|
||||
None => {
|
||||
span_invalid_monomorphization_error(
|
||||
bx.tcx().sess,
|
||||
span,
|
||||
&format!(
|
||||
"invalid monomorphization of `{}` intrinsic: \
|
||||
expected basic float type, found `{}`",
|
||||
name, arg_tys[0]
|
||||
),
|
||||
);
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
sym::float_to_int_unchecked => {
|
||||
if float_type_width(arg_tys[0]).is_none() {
|
||||
span_invalid_monomorphization_error(
|
||||
bx.tcx().sess,
|
||||
span,
|
||||
&format!(
|
||||
"invalid monomorphization of `float_to_int_unchecked` \
|
||||
intrinsic: expected basic float type, \
|
||||
found `{}`",
|
||||
arg_tys[0]
|
||||
),
|
||||
);
|
||||
return;
|
||||
}
|
||||
let (_width, signed) = match int_type_width_signed(ret_ty, bx.tcx()) {
|
||||
Some(pair) => pair,
|
||||
None => {
|
||||
span_invalid_monomorphization_error(
|
||||
bx.tcx().sess,
|
||||
span,
|
||||
&format!(
|
||||
"invalid monomorphization of `float_to_int_unchecked` \
|
||||
intrinsic: expected basic integer type, \
|
||||
found `{}`",
|
||||
ret_ty
|
||||
),
|
||||
);
|
||||
return;
|
||||
}
|
||||
};
|
||||
if signed {
|
||||
bx.fptosi(args[0].immediate(), llret_ty)
|
||||
} else {
|
||||
bx.fptoui(args[0].immediate(), llret_ty)
|
||||
}
|
||||
}
|
||||
|
||||
sym::discriminant_value => {
|
||||
if ret_ty.is_integral() {
|
||||
args[0].deref(bx.cx()).codegen_get_discr(bx, ret_ty)
|
||||
} else {
|
||||
span_bug!(span, "Invalid discriminant type for `{:?}`", arg_tys[0])
|
||||
}
|
||||
}
|
||||
|
||||
// This requires that atomic intrinsics follow a specific naming pattern:
|
||||
// "atomic_<operation>[_<ordering>]", and no ordering means SeqCst
|
||||
name if name_str.starts_with("atomic_") => {
|
||||
use crate::common::AtomicOrdering::*;
|
||||
use crate::common::{AtomicRmwBinOp, SynchronizationScope};
|
||||
|
||||
let split: Vec<&str> = name_str.split('_').collect();
|
||||
|
||||
let is_cxchg = split[1] == "cxchg" || split[1] == "cxchgweak";
|
||||
let (order, failorder) = match split.len() {
|
||||
2 => (SequentiallyConsistent, SequentiallyConsistent),
|
||||
3 => match split[2] {
|
||||
"unordered" => (Unordered, Unordered),
|
||||
"relaxed" => (Monotonic, Monotonic),
|
||||
"acq" => (Acquire, Acquire),
|
||||
"rel" => (Release, Monotonic),
|
||||
"acqrel" => (AcquireRelease, Acquire),
|
||||
"failrelaxed" if is_cxchg => (SequentiallyConsistent, Monotonic),
|
||||
"failacq" if is_cxchg => (SequentiallyConsistent, Acquire),
|
||||
_ => bx.sess().fatal("unknown ordering in atomic intrinsic"),
|
||||
},
|
||||
4 => match (split[2], split[3]) {
|
||||
("acq", "failrelaxed") if is_cxchg => (Acquire, Monotonic),
|
||||
("acqrel", "failrelaxed") if is_cxchg => (AcquireRelease, Monotonic),
|
||||
_ => bx.sess().fatal("unknown ordering in atomic intrinsic"),
|
||||
},
|
||||
_ => bx.sess().fatal("Atomic intrinsic not in correct format"),
|
||||
};
|
||||
|
||||
let invalid_monomorphization = |ty| {
|
||||
span_invalid_monomorphization_error(
|
||||
bx.tcx().sess,
|
||||
span,
|
||||
&format!(
|
||||
"invalid monomorphization of `{}` intrinsic: \
|
||||
expected basic integer type, found `{}`",
|
||||
name, ty
|
||||
),
|
||||
);
|
||||
};
|
||||
|
||||
match split[1] {
|
||||
"cxchg" | "cxchgweak" => {
|
||||
let ty = substs.type_at(0);
|
||||
if int_type_width_signed(ty, bx.tcx()).is_some() {
|
||||
let weak = split[1] == "cxchgweak";
|
||||
let pair = bx.atomic_cmpxchg(
|
||||
args[0].immediate(),
|
||||
args[1].immediate(),
|
||||
args[2].immediate(),
|
||||
order,
|
||||
failorder,
|
||||
weak,
|
||||
);
|
||||
let val = bx.extract_value(pair, 0);
|
||||
let success = bx.extract_value(pair, 1);
|
||||
let val = bx.from_immediate(val);
|
||||
let success = bx.from_immediate(success);
|
||||
|
||||
let dest = result.project_field(bx, 0);
|
||||
bx.store(val, dest.llval, dest.align);
|
||||
let dest = result.project_field(bx, 1);
|
||||
bx.store(success, dest.llval, dest.align);
|
||||
return;
|
||||
} else {
|
||||
return invalid_monomorphization(ty);
|
||||
}
|
||||
}
|
||||
|
||||
"load" => {
|
||||
let ty = substs.type_at(0);
|
||||
if int_type_width_signed(ty, bx.tcx()).is_some() {
|
||||
let size = bx.layout_of(ty).size;
|
||||
bx.atomic_load(args[0].immediate(), order, size)
|
||||
} else {
|
||||
return invalid_monomorphization(ty);
|
||||
}
|
||||
}
|
||||
|
||||
"store" => {
|
||||
let ty = substs.type_at(0);
|
||||
if int_type_width_signed(ty, bx.tcx()).is_some() {
|
||||
let size = bx.layout_of(ty).size;
|
||||
bx.atomic_store(args[1].immediate(), args[0].immediate(), order, size);
|
||||
return;
|
||||
} else {
|
||||
return invalid_monomorphization(ty);
|
||||
}
|
||||
}
|
||||
|
||||
"fence" => {
|
||||
bx.atomic_fence(order, SynchronizationScope::CrossThread);
|
||||
return;
|
||||
}
|
||||
|
||||
"singlethreadfence" => {
|
||||
bx.atomic_fence(order, SynchronizationScope::SingleThread);
|
||||
return;
|
||||
}
|
||||
|
||||
// These are all AtomicRMW ops
|
||||
op => {
|
||||
let atom_op = match op {
|
||||
"xchg" => AtomicRmwBinOp::AtomicXchg,
|
||||
"xadd" => AtomicRmwBinOp::AtomicAdd,
|
||||
"xsub" => AtomicRmwBinOp::AtomicSub,
|
||||
"and" => AtomicRmwBinOp::AtomicAnd,
|
||||
"nand" => AtomicRmwBinOp::AtomicNand,
|
||||
"or" => AtomicRmwBinOp::AtomicOr,
|
||||
"xor" => AtomicRmwBinOp::AtomicXor,
|
||||
"max" => AtomicRmwBinOp::AtomicMax,
|
||||
"min" => AtomicRmwBinOp::AtomicMin,
|
||||
"umax" => AtomicRmwBinOp::AtomicUMax,
|
||||
"umin" => AtomicRmwBinOp::AtomicUMin,
|
||||
_ => bx.sess().fatal("unknown atomic operation"),
|
||||
};
|
||||
|
||||
let ty = substs.type_at(0);
|
||||
if int_type_width_signed(ty, bx.tcx()).is_some() {
|
||||
bx.atomic_rmw(atom_op, args[0].immediate(), args[1].immediate(), order)
|
||||
} else {
|
||||
return invalid_monomorphization(ty);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
sym::nontemporal_store => {
|
||||
let dst = args[0].deref(bx.cx());
|
||||
args[1].val.nontemporal_store(bx, dst);
|
||||
return;
|
||||
}
|
||||
|
||||
sym::ptr_guaranteed_eq | sym::ptr_guaranteed_ne => {
|
||||
let a = args[0].immediate();
|
||||
let b = args[1].immediate();
|
||||
if name == sym::ptr_guaranteed_eq {
|
||||
bx.icmp(IntPredicate::IntEQ, a, b)
|
||||
} else {
|
||||
bx.icmp(IntPredicate::IntNE, a, b)
|
||||
}
|
||||
}
|
||||
|
||||
sym::ptr_offset_from => {
|
||||
let ty = substs.type_at(0);
|
||||
let pointee_size = bx.layout_of(ty).size;
|
||||
|
||||
// This is the same sequence that Clang emits for pointer subtraction.
|
||||
// It can be neither `nsw` nor `nuw` because the input is treated as
|
||||
// unsigned but then the output is treated as signed, so neither works.
|
||||
let a = args[0].immediate();
|
||||
let b = args[1].immediate();
|
||||
let a = bx.ptrtoint(a, bx.type_isize());
|
||||
let b = bx.ptrtoint(b, bx.type_isize());
|
||||
let d = bx.sub(a, b);
|
||||
let pointee_size = bx.const_usize(pointee_size.bytes());
|
||||
// this is where the signed magic happens (notice the `s` in `exactsdiv`)
|
||||
bx.exactsdiv(d, pointee_size)
|
||||
}
|
||||
|
||||
_ => {
|
||||
// Need to use backend-specific things in the implementation.
|
||||
bx.codegen_intrinsic_call(instance, fn_abi, args, llresult, span);
|
||||
return;
|
||||
}
|
||||
};
|
||||
|
||||
if !fn_abi.ret.is_ignore() {
|
||||
if let PassMode::Cast(ty) = fn_abi.ret.mode {
|
||||
let ptr_llty = bx.type_ptr_to(bx.cast_backend_type(&ty));
|
||||
let ptr = bx.pointercast(result.llval, ptr_llty);
|
||||
bx.store(llval, ptr, result.align);
|
||||
} else {
|
||||
OperandRef::from_immediate_or_packed_pair(bx, llval, result.layout)
|
||||
.val
|
||||
.store(bx, result);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Returns the width of an int Ty, and if it's signed or not
|
||||
// Returns None if the type is not an integer
|
||||
// FIXME: there’s multiple of this functions, investigate using some of the already existing
|
||||
// stuffs.
|
||||
fn int_type_width_signed(ty: Ty<'_>, tcx: TyCtxt<'_>) -> Option<(u64, bool)> {
|
||||
match ty.kind() {
|
||||
ty::Int(t) => Some((t.bit_width().unwrap_or(u64::from(tcx.sess.target.ptr_width)), true)),
|
||||
ty::Uint(t) => Some((t.bit_width().unwrap_or(u64::from(tcx.sess.target.ptr_width)), false)),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
|
||||
// Returns the width of a float Ty
|
||||
// Returns None if the type is not a float
|
||||
fn float_type_width(ty: Ty<'_>) -> Option<u64> {
|
||||
match ty.kind() {
|
||||
ty::Float(t) => Some(t.bit_width()),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
@ -486,6 +486,7 @@ mod block;
|
||||
pub mod constant;
|
||||
pub mod coverageinfo;
|
||||
pub mod debuginfo;
|
||||
mod intrinsic;
|
||||
pub mod operand;
|
||||
pub mod place;
|
||||
mod rvalue;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user