use crate::abi::{Abi, FnAbi, FnAbiLlvmExt, LlvmType, PassMode};
use crate::builder::Builder;
use crate::context::CodegenCx;
use crate::llvm;
use crate::type_::Type;
use crate::type_of::LayoutLlvmExt;
use crate::va_arg::emit_va_arg;
use crate::value::Value;
use rustc_codegen_ssa::base::{compare_simd_types, wants_msvc_seh, wants_wasm_eh};
use rustc_codegen_ssa::common::{IntPredicate, TypeKind};
use rustc_codegen_ssa::errors::{ExpectedPointerMutability, InvalidMonomorphization};
use rustc_codegen_ssa::mir::operand::OperandRef;
use rustc_codegen_ssa::mir::place::PlaceRef;
use rustc_codegen_ssa::traits::*;
use rustc_hir as hir;
use rustc_middle::ty::layout::{FnAbiOf, HasTyCtxt, LayoutOf};
use rustc_middle::ty::{self, GenericArgsRef, Ty};
use rustc_middle::{bug, span_bug};
use rustc_span::{sym, symbol::kw, Span, Symbol};
use rustc_target::abi::{self, Align, HasDataLayout, Primitive};
use rustc_target::spec::{HasTargetSpec, PanicStrategy};
use std::cmp::Ordering;
fn get_simple_intrinsic<'ll>(
cx: &CodegenCx<'ll, '_>,
name: Symbol,
) -> Option<(&'ll Type, &'ll Value)> {
let llvm_name = match name {
sym::sqrtf32 => "llvm.sqrt.f32",
sym::sqrtf64 => "llvm.sqrt.f64",
sym::powif32 => "llvm.powi.f32",
sym::powif64 => "llvm.powi.f64",
sym::sinf32 => "llvm.sin.f32",
sym::sinf64 => "llvm.sin.f64",
sym::cosf32 => "llvm.cos.f32",
sym::cosf64 => "llvm.cos.f64",
sym::powf32 => "llvm.pow.f32",
sym::powf64 => "llvm.pow.f64",
sym::expf32 => "llvm.exp.f32",
sym::expf64 => "llvm.exp.f64",
sym::exp2f32 => "llvm.exp2.f32",
sym::exp2f64 => "llvm.exp2.f64",
sym::logf32 => "llvm.log.f32",
sym::logf64 => "llvm.log.f64",
sym::log10f32 => "llvm.log10.f32",
sym::log10f64 => "llvm.log10.f64",
sym::log2f32 => "llvm.log2.f32",
sym::log2f64 => "llvm.log2.f64",
sym::fmaf32 => "llvm.fma.f32",
sym::fmaf64 => "llvm.fma.f64",
sym::fabsf32 => "llvm.fabs.f32",
sym::fabsf64 => "llvm.fabs.f64",
sym::minnumf32 => "llvm.minnum.f32",
sym::minnumf64 => "llvm.minnum.f64",
sym::maxnumf32 => "llvm.maxnum.f32",
sym::maxnumf64 => "llvm.maxnum.f64",
sym::copysignf32 => "llvm.copysign.f32",
sym::copysignf64 => "llvm.copysign.f64",
sym::floorf32 => "llvm.floor.f32",
sym::floorf64 => "llvm.floor.f64",
sym::ceilf32 => "llvm.ceil.f32",
sym::ceilf64 => "llvm.ceil.f64",
sym::truncf32 => "llvm.trunc.f32",
sym::truncf64 => "llvm.trunc.f64",
sym::rintf32 => "llvm.rint.f32",
sym::rintf64 => "llvm.rint.f64",
sym::nearbyintf32 => "llvm.nearbyint.f32",
sym::nearbyintf64 => "llvm.nearbyint.f64",
sym::roundf32 => "llvm.round.f32",
sym::roundf64 => "llvm.round.f64",
sym::ptr_mask => "llvm.ptrmask",
sym::roundevenf32 => "llvm.roundeven.f32",
sym::roundevenf64 => "llvm.roundeven.f64",
_ => return None,
};
Some(cx.get_intrinsic(llvm_name))
}
impl<'ll, 'tcx> IntrinsicCallMethods<'tcx> for Builder<'_, 'll, 'tcx> {
fn codegen_intrinsic_call(
&mut self,
instance: ty::Instance<'tcx>,
fn_abi: &FnAbi<'tcx, Ty<'tcx>>,
args: &[OperandRef<'tcx, &'ll Value>],
llresult: &'ll Value,
span: Span,
) {
let tcx = self.tcx;
let callee_ty = instance.ty(tcx, ty::ParamEnv::reveal_all());
let ty::FnDef(def_id, fn_args) = *callee_ty.kind() else {
bug!("expected fn item type, found {}", callee_ty);
};
let sig = callee_ty.fn_sig(tcx);
let sig = tcx.normalize_erasing_late_bound_regions(ty::ParamEnv::reveal_all(), sig);
let arg_tys = sig.inputs();
let ret_ty = sig.output();
let name = tcx.item_name(def_id);
let llret_ty = self.layout_of(ret_ty).llvm_type(self);
let result = PlaceRef::new_sized(llresult, fn_abi.ret.layout);
let simple = get_simple_intrinsic(self, name);
let llval = match name {
_ if simple.is_some() => {
let (simple_ty, simple_fn) = simple.unwrap();
self.call(
simple_ty,
None,
None,
simple_fn,
&args.iter().map(|arg| arg.immediate()).collect::<Vec<_>>(),
None,
)
}
sym::likely => {
self.call_intrinsic("llvm.expect.i1", &[args[0].immediate(), self.const_bool(true)])
}
sym::unlikely => self
.call_intrinsic("llvm.expect.i1", &[args[0].immediate(), self.const_bool(false)]),
kw::Try => {
try_intrinsic(
self,
args[0].immediate(),
args[1].immediate(),
args[2].immediate(),
llresult,
);
return;
}
sym::breakpoint => self.call_intrinsic("llvm.debugtrap", &[]),
sym::va_copy => {
self.call_intrinsic("llvm.va_copy", &[args[0].immediate(), args[1].immediate()])
}
sym::va_arg => {
match fn_abi.ret.layout.abi {
abi::Abi::Scalar(scalar) => {
match scalar.primitive() {
Primitive::Int(..) => {
if self.cx().size_of(ret_ty).bytes() < 4 {
let promoted_result = emit_va_arg(self, args[0], tcx.types.i32);
self.trunc(promoted_result, llret_ty)
} else {
emit_va_arg(self, args[0], ret_ty)
}
}
Primitive::F64 | Primitive::Pointer(_) => {
emit_va_arg(self, args[0], ret_ty)
}
Primitive::F32 => bug!("the va_arg intrinsic does not work with `f32`"),
}
}
_ => bug!("the va_arg intrinsic does not work with non-scalar types"),
}
}
sym::volatile_load | sym::unaligned_volatile_load => {
let tp_ty = fn_args.type_at(0);
let ptr = args[0].immediate();
let load = if let PassMode::Cast { cast: ty, pad_i32: _ } = &fn_abi.ret.mode {
let llty = ty.llvm_type(self);
self.volatile_load(llty, ptr)
} else {
self.volatile_load(self.layout_of(tp_ty).llvm_type(self), ptr)
};
let align = if name == sym::unaligned_volatile_load {
1
} else {
self.align_of(tp_ty).bytes() as u32
};
unsafe {
llvm::LLVMSetAlignment(load, align);
}
self.to_immediate(load, self.layout_of(tp_ty))
}
sym::volatile_store => {
let dst = args[0].deref(self.cx());
args[1].val.volatile_store(self, dst);
return;
}
sym::unaligned_volatile_store => {
let dst = args[0].deref(self.cx());
args[1].val.unaligned_volatile_store(self, dst);
return;
}
sym::prefetch_read_data
| sym::prefetch_write_data
| sym::prefetch_read_instruction
| sym::prefetch_write_instruction => {
let (rw, cache_type) = match name {
sym::prefetch_read_data => (0, 1),
sym::prefetch_write_data => (1, 1),
sym::prefetch_read_instruction => (0, 0),
sym::prefetch_write_instruction => (1, 0),
_ => bug!(),
};
self.call_intrinsic(
"llvm.prefetch",
&[
args[0].immediate(),
self.const_i32(rw),
args[1].immediate(),
self.const_i32(cache_type),
],
)
}
sym::ctlz
| sym::ctlz_nonzero
| sym::cttz
| sym::cttz_nonzero
| sym::ctpop
| sym::bswap
| sym::bitreverse
| sym::rotate_left
| sym::rotate_right
| sym::saturating_add
| sym::saturating_sub => {
let ty = arg_tys[0];
match int_type_width_signed(ty, self) {
Some((width, signed)) => match name {
sym::ctlz | sym::cttz => {
let y = self.const_bool(false);
self.call_intrinsic(
&format!("llvm.{name}.i{width}"),
&[args[0].immediate(), y],
)
}
sym::ctlz_nonzero => {
let y = self.const_bool(true);
let llvm_name = &format!("llvm.ctlz.i{width}");
self.call_intrinsic(llvm_name, &[args[0].immediate(), y])
}
sym::cttz_nonzero => {
let y = self.const_bool(true);
let llvm_name = &format!("llvm.cttz.i{width}");
self.call_intrinsic(llvm_name, &[args[0].immediate(), y])
}
sym::ctpop => self.call_intrinsic(
&format!("llvm.ctpop.i{width}"),
&[args[0].immediate()],
),
sym::bswap => {
if width == 8 {
args[0].immediate() } else {
self.call_intrinsic(
&format!("llvm.bswap.i{width}"),
&[args[0].immediate()],
)
}
}
sym::bitreverse => self.call_intrinsic(
&format!("llvm.bitreverse.i{width}"),
&[args[0].immediate()],
),
sym::rotate_left | sym::rotate_right => {
let is_left = name == sym::rotate_left;
let val = args[0].immediate();
let raw_shift = args[1].immediate();
let llvm_name =
&format!("llvm.fsh{}.i{}", if is_left { 'l' } else { 'r' }, width);
self.call_intrinsic(llvm_name, &[val, val, raw_shift])
}
sym::saturating_add | sym::saturating_sub => {
let is_add = name == sym::saturating_add;
let lhs = args[0].immediate();
let rhs = args[1].immediate();
let llvm_name = &format!(
"llvm.{}{}.sat.i{}",
if signed { 's' } else { 'u' },
if is_add { "add" } else { "sub" },
width
);
self.call_intrinsic(llvm_name, &[lhs, rhs])
}
_ => bug!(),
},
None => {
tcx.sess.emit_err(InvalidMonomorphization::BasicIntegerType {
span,
name,
ty,
});
return;
}
}
}
sym::raw_eq => {
use abi::Abi::*;
let tp_ty = fn_args.type_at(0);
let layout = self.layout_of(tp_ty).layout;
let use_integer_compare = match layout.abi() {
Scalar(_) | ScalarPair(_, _) => true,
Uninhabited | Vector { .. } => false,
Aggregate { .. } => {
layout.size() <= self.data_layout().pointer_size * 2
}
};
let a = args[0].immediate();
let b = args[1].immediate();
if layout.size().bytes() == 0 {
self.const_bool(true)
} else if use_integer_compare {
let integer_ty = self.type_ix(layout.size().bits());
let a_val = self.load(integer_ty, a, layout.align().abi);
let b_val = self.load(integer_ty, b, layout.align().abi);
self.icmp(IntPredicate::IntEQ, a_val, b_val)
} else {
let n = self.const_usize(layout.size().bytes());
let cmp = self.call_intrinsic("memcmp", &[a, b, n]);
match self.cx.sess().target.arch.as_ref() {
"avr" | "msp430" => self.icmp(IntPredicate::IntEQ, cmp, self.const_i16(0)),
_ => self.icmp(IntPredicate::IntEQ, cmp, self.const_i32(0)),
}
}
}
sym::compare_bytes => {
let cmp = self.call_intrinsic(
"memcmp",
&[args[0].immediate(), args[1].immediate(), args[2].immediate()],
);
self.sext(cmp, self.type_ix(32))
}
sym::black_box => {
args[0].val.store(self, result);
let result_val_span = [result.llval];
let (constraint, inputs): (&str, &[_]) = if result.layout.is_zst() {
("~{memory}", &[])
} else {
("r,~{memory}", &result_val_span)
};
crate::asm::inline_asm_call(
self,
"",
constraint,
inputs,
self.type_void(),
true,
false,
llvm::AsmDialect::Att,
&[span],
false,
None,
)
.unwrap_or_else(|| bug!("failed to generate inline asm call for `black_box`"));
return;
}
_ if name.as_str().starts_with("simd_") => {
match generic_simd_intrinsic(
self, name, callee_ty, fn_args, args, ret_ty, llret_ty, span,
) {
Ok(llval) => llval,
Err(()) => return,
}
}
_ => bug!("unknown intrinsic '{}' -- should it have been lowered earlier?", name),
};
if !fn_abi.ret.is_ignore() {
if let PassMode::Cast { .. } = &fn_abi.ret.mode {
self.store(llval, result.llval, result.align);
} else {
OperandRef::from_immediate_or_packed_pair(self, llval, result.layout)
.val
.store(self, result);
}
}
}
fn abort(&mut self) {
self.call_intrinsic("llvm.trap", &[]);
}
fn assume(&mut self, val: Self::Value) {
self.call_intrinsic("llvm.assume", &[val]);
}
fn expect(&mut self, cond: Self::Value, expected: bool) -> Self::Value {
self.call_intrinsic("llvm.expect.i1", &[cond, self.const_bool(expected)])
}
fn type_test(&mut self, pointer: Self::Value, typeid: Self::Value) -> Self::Value {
self.call_intrinsic("llvm.type.test", &[pointer, typeid])
}
fn type_checked_load(
&mut self,
llvtable: &'ll Value,
vtable_byte_offset: u64,
typeid: &'ll Value,
) -> Self::Value {
let vtable_byte_offset = self.const_i32(vtable_byte_offset as i32);
let type_checked_load =
self.call_intrinsic("llvm.type.checked.load", &[llvtable, vtable_byte_offset, typeid]);
self.extract_value(type_checked_load, 0)
}
fn va_start(&mut self, va_list: &'ll Value) -> &'ll Value {
self.call_intrinsic("llvm.va_start", &[va_list])
}
fn va_end(&mut self, va_list: &'ll Value) -> &'ll Value {
self.call_intrinsic("llvm.va_end", &[va_list])
}
}
fn try_intrinsic<'ll>(
bx: &mut Builder<'_, 'll, '_>,
try_func: &'ll Value,
data: &'ll Value,
catch_func: &'ll Value,
dest: &'ll Value,
) {
if bx.sess().panic_strategy() == PanicStrategy::Abort {
let try_func_ty = bx.type_func(&[bx.type_ptr()], bx.type_void());
bx.call(try_func_ty, None, None, try_func, &[data], None);
let ret_align = bx.tcx().data_layout.i32_align.abi;
bx.store(bx.const_i32(0), dest, ret_align);
} else if wants_msvc_seh(bx.sess()) {
codegen_msvc_try(bx, try_func, data, catch_func, dest);
} else if wants_wasm_eh(bx.sess()) {
codegen_wasm_try(bx, try_func, data, catch_func, dest);
} else if bx.sess().target.os == "emscripten" {
codegen_emcc_try(bx, try_func, data, catch_func, dest);
} else {
codegen_gnu_try(bx, try_func, data, catch_func, dest);
}
}
fn codegen_msvc_try<'ll>(
bx: &mut Builder<'_, 'll, '_>,
try_func: &'ll Value,
data: &'ll Value,
catch_func: &'ll Value,
dest: &'ll Value,
) {
let (llty, llfn) = get_rust_try_fn(bx, &mut |mut bx| {
bx.set_personality_fn(bx.eh_personality());
let normal = bx.append_sibling_block("normal");
let catchswitch = bx.append_sibling_block("catchswitch");
let catchpad_rust = bx.append_sibling_block("catchpad_rust");
let catchpad_foreign = bx.append_sibling_block("catchpad_foreign");
let caught = bx.append_sibling_block("caught");
let try_func = llvm::get_param(bx.llfn(), 0);
let data = llvm::get_param(bx.llfn(), 1);
let catch_func = llvm::get_param(bx.llfn(), 2);
let ptr_align = bx.tcx().data_layout.pointer_align.abi;
let slot = bx.alloca(bx.type_ptr(), ptr_align);
let try_func_ty = bx.type_func(&[bx.type_ptr()], bx.type_void());
bx.invoke(try_func_ty, None, None, try_func, &[data], normal, catchswitch, None);
bx.switch_to_block(normal);
bx.ret(bx.const_i32(0));
bx.switch_to_block(catchswitch);
let cs = bx.catch_switch(None, None, &[catchpad_rust, catchpad_foreign]);
let type_info_vtable = bx.declare_global("??_7type_info@@6B@", bx.type_ptr());
let type_name = bx.const_bytes(b"rust_panic\0");
let type_info =
bx.const_struct(&[type_info_vtable, bx.const_null(bx.type_ptr()), type_name], false);
let tydesc = bx.declare_global("__rust_panic_type_info", bx.val_ty(type_info));
unsafe {
llvm::LLVMRustSetLinkage(tydesc, llvm::Linkage::LinkOnceODRLinkage);
llvm::SetUniqueComdat(bx.llmod, tydesc);
llvm::LLVMSetInitializer(tydesc, type_info);
}
bx.switch_to_block(catchpad_rust);
let flags = bx.const_i32(8);
let funclet = bx.catch_pad(cs, &[tydesc, flags, slot]);
let ptr = bx.load(bx.type_ptr(), slot, ptr_align);
let catch_ty = bx.type_func(&[bx.type_ptr(), bx.type_ptr()], bx.type_void());
bx.call(catch_ty, None, None, catch_func, &[data, ptr], Some(&funclet));
bx.catch_ret(&funclet, caught);
bx.switch_to_block(catchpad_foreign);
let flags = bx.const_i32(64);
let null = bx.const_null(bx.type_ptr());
let funclet = bx.catch_pad(cs, &[null, flags, null]);
bx.call(catch_ty, None, None, catch_func, &[data, null], Some(&funclet));
bx.catch_ret(&funclet, caught);
bx.switch_to_block(caught);
bx.ret(bx.const_i32(1));
});
let ret = bx.call(llty, None, None, llfn, &[try_func, data, catch_func], None);
let i32_align = bx.tcx().data_layout.i32_align.abi;
bx.store(ret, dest, i32_align);
}
fn codegen_wasm_try<'ll>(
bx: &mut Builder<'_, 'll, '_>,
try_func: &'ll Value,
data: &'ll Value,
catch_func: &'ll Value,
dest: &'ll Value,
) {
let (llty, llfn) = get_rust_try_fn(bx, &mut |mut bx| {
bx.set_personality_fn(bx.eh_personality());
let normal = bx.append_sibling_block("normal");
let catchswitch = bx.append_sibling_block("catchswitch");
let catchpad = bx.append_sibling_block("catchpad");
let caught = bx.append_sibling_block("caught");
let try_func = llvm::get_param(bx.llfn(), 0);
let data = llvm::get_param(bx.llfn(), 1);
let catch_func = llvm::get_param(bx.llfn(), 2);
let try_func_ty = bx.type_func(&[bx.type_ptr()], bx.type_void());
bx.invoke(try_func_ty, None, None, try_func, &[data], normal, catchswitch, None);
bx.switch_to_block(normal);
bx.ret(bx.const_i32(0));
bx.switch_to_block(catchswitch);
let cs = bx.catch_switch(None, None, &[catchpad]);
bx.switch_to_block(catchpad);
let null = bx.const_null(bx.type_ptr());
let funclet = bx.catch_pad(cs, &[null]);
let ptr = bx.call_intrinsic("llvm.wasm.get.exception", &[funclet.cleanuppad()]);
let _sel = bx.call_intrinsic("llvm.wasm.get.ehselector", &[funclet.cleanuppad()]);
let catch_ty = bx.type_func(&[bx.type_ptr(), bx.type_ptr()], bx.type_void());
bx.call(catch_ty, None, None, catch_func, &[data, ptr], Some(&funclet));
bx.catch_ret(&funclet, caught);
bx.switch_to_block(caught);
bx.ret(bx.const_i32(1));
});
let ret = bx.call(llty, None, None, llfn, &[try_func, data, catch_func], None);
let i32_align = bx.tcx().data_layout.i32_align.abi;
bx.store(ret, dest, i32_align);
}
fn codegen_gnu_try<'ll>(
bx: &mut Builder<'_, 'll, '_>,
try_func: &'ll Value,
data: &'ll Value,
catch_func: &'ll Value,
dest: &'ll Value,
) {
let (llty, llfn) = get_rust_try_fn(bx, &mut |mut bx| {
let then = bx.append_sibling_block("then");
let catch = bx.append_sibling_block("catch");
let try_func = llvm::get_param(bx.llfn(), 0);
let data = llvm::get_param(bx.llfn(), 1);
let catch_func = llvm::get_param(bx.llfn(), 2);
let try_func_ty = bx.type_func(&[bx.type_ptr()], bx.type_void());
bx.invoke(try_func_ty, None, None, try_func, &[data], then, catch, None);
bx.switch_to_block(then);
bx.ret(bx.const_i32(0));
bx.switch_to_block(catch);
let lpad_ty = bx.type_struct(&[bx.type_ptr(), bx.type_i32()], false);
let vals = bx.landing_pad(lpad_ty, bx.eh_personality(), 1);
let tydesc = bx.const_null(bx.type_ptr());
bx.add_clause(vals, tydesc);
let ptr = bx.extract_value(vals, 0);
let catch_ty = bx.type_func(&[bx.type_ptr(), bx.type_ptr()], bx.type_void());
bx.call(catch_ty, None, None, catch_func, &[data, ptr], None);
bx.ret(bx.const_i32(1));
});
let ret = bx.call(llty, None, None, llfn, &[try_func, data, catch_func], None);
let i32_align = bx.tcx().data_layout.i32_align.abi;
bx.store(ret, dest, i32_align);
}
fn codegen_emcc_try<'ll>(
bx: &mut Builder<'_, 'll, '_>,
try_func: &'ll Value,
data: &'ll Value,
catch_func: &'ll Value,
dest: &'ll Value,
) {
let (llty, llfn) = get_rust_try_fn(bx, &mut |mut bx| {
let then = bx.append_sibling_block("then");
let catch = bx.append_sibling_block("catch");
let try_func = llvm::get_param(bx.llfn(), 0);
let data = llvm::get_param(bx.llfn(), 1);
let catch_func = llvm::get_param(bx.llfn(), 2);
let try_func_ty = bx.type_func(&[bx.type_ptr()], bx.type_void());
bx.invoke(try_func_ty, None, None, try_func, &[data], then, catch, None);
bx.switch_to_block(then);
bx.ret(bx.const_i32(0));
bx.switch_to_block(catch);
let tydesc = bx.eh_catch_typeinfo();
let lpad_ty = bx.type_struct(&[bx.type_ptr(), bx.type_i32()], false);
let vals = bx.landing_pad(lpad_ty, bx.eh_personality(), 2);
bx.add_clause(vals, tydesc);
bx.add_clause(vals, bx.const_null(bx.type_ptr()));
let ptr = bx.extract_value(vals, 0);
let selector = bx.extract_value(vals, 1);
let rust_typeid = bx.call_intrinsic("llvm.eh.typeid.for", &[tydesc]);
let is_rust_panic = bx.icmp(IntPredicate::IntEQ, selector, rust_typeid);
let is_rust_panic = bx.zext(is_rust_panic, bx.type_bool());
let ptr_align = bx.tcx().data_layout.pointer_align.abi;
let i8_align = bx.tcx().data_layout.i8_align.abi;
let catch_data_type = bx.type_struct(&[bx.type_ptr(), bx.type_bool()], false);
let catch_data = bx.alloca(catch_data_type, ptr_align);
let catch_data_0 =
bx.inbounds_gep(catch_data_type, catch_data, &[bx.const_usize(0), bx.const_usize(0)]);
bx.store(ptr, catch_data_0, ptr_align);
let catch_data_1 =
bx.inbounds_gep(catch_data_type, catch_data, &[bx.const_usize(0), bx.const_usize(1)]);
bx.store(is_rust_panic, catch_data_1, i8_align);
let catch_ty = bx.type_func(&[bx.type_ptr(), bx.type_ptr()], bx.type_void());
bx.call(catch_ty, None, None, catch_func, &[data, catch_data], None);
bx.ret(bx.const_i32(1));
});
let ret = bx.call(llty, None, None, llfn, &[try_func, data, catch_func], None);
let i32_align = bx.tcx().data_layout.i32_align.abi;
bx.store(ret, dest, i32_align);
}
fn gen_fn<'ll, 'tcx>(
cx: &CodegenCx<'ll, 'tcx>,
name: &str,
rust_fn_sig: ty::PolyFnSig<'tcx>,
codegen: &mut dyn FnMut(Builder<'_, 'll, 'tcx>),
) -> (&'ll Type, &'ll Value) {
let fn_abi = cx.fn_abi_of_fn_ptr(rust_fn_sig, ty::List::empty());
let llty = fn_abi.llvm_type(cx);
let llfn = cx.declare_fn(name, fn_abi, None);
cx.set_frame_pointer_type(llfn);
cx.apply_target_cpu_attr(llfn);
unsafe { llvm::LLVMRustSetLinkage(llfn, llvm::Linkage::InternalLinkage) };
let llbb = Builder::append_block(cx, llfn, "entry-block");
let bx = Builder::build(cx, llbb);
codegen(bx);
(llty, llfn)
}
fn get_rust_try_fn<'ll, 'tcx>(
cx: &CodegenCx<'ll, 'tcx>,
codegen: &mut dyn FnMut(Builder<'_, 'll, 'tcx>),
) -> (&'ll Type, &'ll Value) {
if let Some(llfn) = cx.rust_try_fn.get() {
return llfn;
}
let tcx = cx.tcx;
let i8p = Ty::new_mut_ptr(tcx, tcx.types.i8);
let try_fn_ty = Ty::new_fn_ptr(
tcx,
ty::Binder::dummy(tcx.mk_fn_sig(
[i8p],
Ty::new_unit(tcx),
false,
hir::Unsafety::Unsafe,
Abi::Rust,
)),
);
let catch_fn_ty = Ty::new_fn_ptr(
tcx,
ty::Binder::dummy(tcx.mk_fn_sig(
[i8p, i8p],
Ty::new_unit(tcx),
false,
hir::Unsafety::Unsafe,
Abi::Rust,
)),
);
let rust_fn_sig = ty::Binder::dummy(cx.tcx.mk_fn_sig(
[try_fn_ty, i8p, catch_fn_ty],
tcx.types.i32,
false,
hir::Unsafety::Unsafe,
Abi::Rust,
));
let rust_try = gen_fn(cx, "__rust_try", rust_fn_sig, codegen);
cx.rust_try_fn.set(Some(rust_try));
rust_try
}
fn generic_simd_intrinsic<'ll, 'tcx>(
bx: &mut Builder<'_, 'll, 'tcx>,
name: Symbol,
callee_ty: Ty<'tcx>,
fn_args: GenericArgsRef<'tcx>,
args: &[OperandRef<'tcx, &'ll Value>],
ret_ty: Ty<'tcx>,
llret_ty: &'ll Type,
span: Span,
) -> Result<&'ll Value, ()> {
macro_rules! return_error {
($diag: expr) => {{
bx.sess().emit_err($diag);
return Err(());
}};
}
macro_rules! require {
($cond: expr, $diag: expr) => {
if !$cond {
return_error!($diag);
}
};
}
macro_rules! require_simd {
($ty: expr, $diag: expr) => {
require!($ty.is_simd(), $diag)
};
}
let tcx = bx.tcx();
let sig =
tcx.normalize_erasing_late_bound_regions(ty::ParamEnv::reveal_all(), callee_ty.fn_sig(tcx));
let arg_tys = sig.inputs();
if name == sym::simd_select_bitmask {
require_simd!(
arg_tys[1],
InvalidMonomorphization::SimdArgument { span, name, ty: arg_tys[1] }
);
let (len, _) = arg_tys[1].simd_size_and_type(bx.tcx());
let expected_int_bits = (len.max(8) - 1).next_power_of_two();
let expected_bytes = len / 8 + ((len % 8 > 0) as u64);
let mask_ty = arg_tys[0];
let mask = match mask_ty.kind() {
ty::Int(i) if i.bit_width() == Some(expected_int_bits) => args[0].immediate(),
ty::Uint(i) if i.bit_width() == Some(expected_int_bits) => args[0].immediate(),
ty::Array(elem, len)
if matches!(elem.kind(), ty::Uint(ty::UintTy::U8))
&& len.try_eval_target_usize(bx.tcx, ty::ParamEnv::reveal_all())
== Some(expected_bytes) =>
{
let place = PlaceRef::alloca(bx, args[0].layout);
args[0].val.store(bx, place);
let int_ty = bx.type_ix(expected_bytes * 8);
bx.load(int_ty, place.llval, Align::ONE)
}
_ => return_error!(InvalidMonomorphization::InvalidBitmask {
span,
name,
mask_ty,
expected_int_bits,
expected_bytes
}),
};
let i1 = bx.type_i1();
let im = bx.type_ix(len);
let i1xn = bx.type_vector(i1, len);
let m_im = bx.trunc(mask, im);
let m_i1s = bx.bitcast(m_im, i1xn);
return Ok(bx.select(m_i1s, args[1].immediate(), args[2].immediate()));
}
require_simd!(arg_tys[0], InvalidMonomorphization::SimdInput { span, name, ty: arg_tys[0] });
let in_ty = arg_tys[0];
let comparison = match name {
sym::simd_eq => Some(hir::BinOpKind::Eq),
sym::simd_ne => Some(hir::BinOpKind::Ne),
sym::simd_lt => Some(hir::BinOpKind::Lt),
sym::simd_le => Some(hir::BinOpKind::Le),
sym::simd_gt => Some(hir::BinOpKind::Gt),
sym::simd_ge => Some(hir::BinOpKind::Ge),
_ => None,
};
let (in_len, in_elem) = arg_tys[0].simd_size_and_type(bx.tcx());
if let Some(cmp_op) = comparison {
require_simd!(ret_ty, InvalidMonomorphization::SimdReturn { span, name, ty: ret_ty });
let (out_len, out_ty) = ret_ty.simd_size_and_type(bx.tcx());
require!(
in_len == out_len,
InvalidMonomorphization::ReturnLengthInputType {
span,
name,
in_len,
in_ty,
ret_ty,
out_len
}
);
require!(
bx.type_kind(bx.element_type(llret_ty)) == TypeKind::Integer,
InvalidMonomorphization::ReturnIntegerType { span, name, ret_ty, out_ty }
);
return Ok(compare_simd_types(
bx,
args[0].immediate(),
args[1].immediate(),
in_elem,
llret_ty,
cmp_op,
));
}
if name == sym::simd_shuffle_generic {
let idx = fn_args[2]
.expect_const()
.eval(tcx, ty::ParamEnv::reveal_all(), Some(span))
.unwrap()
.unwrap_branch();
let n = idx.len() as u64;
require_simd!(ret_ty, InvalidMonomorphization::SimdReturn { span, name, ty: ret_ty });
let (out_len, out_ty) = ret_ty.simd_size_and_type(bx.tcx());
require!(
out_len == n,
InvalidMonomorphization::ReturnLength { span, name, in_len: n, ret_ty, out_len }
);
require!(
in_elem == out_ty,
InvalidMonomorphization::ReturnElement { span, name, in_elem, in_ty, ret_ty, out_ty }
);
let total_len = in_len * 2;
let indices: Option<Vec<_>> = idx
.iter()
.enumerate()
.map(|(arg_idx, val)| {
let idx = val.unwrap_leaf().try_to_i32().unwrap();
if idx >= i32::try_from(total_len).unwrap() {
bx.sess().emit_err(InvalidMonomorphization::ShuffleIndexOutOfBounds {
span,
name,
arg_idx: arg_idx as u64,
total_len: total_len.into(),
});
None
} else {
Some(bx.const_i32(idx))
}
})
.collect();
let Some(indices) = indices else {
return Ok(bx.const_null(llret_ty));
};
return Ok(bx.shuffle_vector(
args[0].immediate(),
args[1].immediate(),
bx.const_vector(&indices),
));
}
if name == sym::simd_shuffle {
let n: u64 = match args[2].layout.ty.kind() {
ty::Array(ty, len) if matches!(ty.kind(), ty::Uint(ty::UintTy::U32)) => {
len.try_eval_target_usize(bx.cx.tcx, ty::ParamEnv::reveal_all()).unwrap_or_else(
|| span_bug!(span, "could not evaluate shuffle index array length"),
)
}
_ => return_error!(InvalidMonomorphization::SimdShuffle {
span,
name,
ty: args[2].layout.ty
}),
};
require_simd!(ret_ty, InvalidMonomorphization::SimdReturn { span, name, ty: ret_ty });
let (out_len, out_ty) = ret_ty.simd_size_and_type(bx.tcx());
require!(
out_len == n,
InvalidMonomorphization::ReturnLength { span, name, in_len: n, ret_ty, out_len }
);
require!(
in_elem == out_ty,
InvalidMonomorphization::ReturnElement { span, name, in_elem, in_ty, ret_ty, out_ty }
);
let total_len = u128::from(in_len) * 2;
let vector = args[2].immediate();
let indices: Option<Vec<_>> = (0..n)
.map(|i| {
let arg_idx = i;
let val = bx.const_get_elt(vector, i as u64);
match bx.const_to_opt_u128(val, true) {
None => {
bx.sess().emit_err(InvalidMonomorphization::ShuffleIndexNotConstant {
span,
name,
arg_idx,
});
None
}
Some(idx) if idx >= total_len => {
bx.sess().emit_err(InvalidMonomorphization::ShuffleIndexOutOfBounds {
span,
name,
arg_idx,
total_len,
});
None
}
Some(idx) => Some(bx.const_i32(idx as i32)),
}
})
.collect();
let Some(indices) = indices else {
return Ok(bx.const_null(llret_ty));
};
return Ok(bx.shuffle_vector(
args[0].immediate(),
args[1].immediate(),
bx.const_vector(&indices),
));
}
if name == sym::simd_insert {
require!(
in_elem == arg_tys[2],
InvalidMonomorphization::InsertedType {
span,
name,
in_elem,
in_ty,
out_ty: arg_tys[2]
}
);
return Ok(bx.insert_element(
args[0].immediate(),
args[2].immediate(),
args[1].immediate(),
));
}
if name == sym::simd_extract {
require!(
ret_ty == in_elem,
InvalidMonomorphization::ReturnType { span, name, in_elem, in_ty, ret_ty }
);
return Ok(bx.extract_element(args[0].immediate(), args[1].immediate()));
}
if name == sym::simd_select {
let m_elem_ty = in_elem;
let m_len = in_len;
require_simd!(
arg_tys[1],
InvalidMonomorphization::SimdArgument { span, name, ty: arg_tys[1] }
);
let (v_len, _) = arg_tys[1].simd_size_and_type(bx.tcx());
require!(
m_len == v_len,
InvalidMonomorphization::MismatchedLengths { span, name, m_len, v_len }
);
match m_elem_ty.kind() {
ty::Int(_) => {}
_ => return_error!(InvalidMonomorphization::MaskType { span, name, ty: m_elem_ty }),
}
let i1 = bx.type_i1();
let i1xn = bx.type_vector(i1, m_len as u64);
let m_i1s = bx.trunc(args[0].immediate(), i1xn);
return Ok(bx.select(m_i1s, args[1].immediate(), args[2].immediate()));
}
if name == sym::simd_bitmask {
let expected_int_bits = in_len.max(8);
let expected_bytes = expected_int_bits / 8 + ((expected_int_bits % 8 > 0) as u64);
let (i_xn, in_elem_bitwidth) = match in_elem.kind() {
ty::Int(i) => (
args[0].immediate(),
i.bit_width().unwrap_or_else(|| bx.data_layout().pointer_size.bits()),
),
ty::Uint(i) => (
args[0].immediate(),
i.bit_width().unwrap_or_else(|| bx.data_layout().pointer_size.bits()),
),
_ => return_error!(InvalidMonomorphization::VectorArgument {
span,
name,
in_ty,
in_elem
}),
};
let shift_indices =
vec![
bx.cx.const_int(bx.type_ix(in_elem_bitwidth), (in_elem_bitwidth - 1) as _);
in_len as _
];
let i_xn_msb = bx.lshr(i_xn, bx.const_vector(shift_indices.as_slice()));
let i1xn = bx.trunc(i_xn_msb, bx.type_vector(bx.type_i1(), in_len));
let i_ = bx.bitcast(i1xn, bx.type_ix(in_len));
match ret_ty.kind() {
ty::Uint(i) if i.bit_width() == Some(expected_int_bits) => {
return Ok(bx.zext(i_, bx.type_ix(expected_int_bits)));
}
ty::Array(elem, len)
if matches!(elem.kind(), ty::Uint(ty::UintTy::U8))
&& len.try_eval_target_usize(bx.tcx, ty::ParamEnv::reveal_all())
== Some(expected_bytes) =>
{
let ze = bx.zext(i_, bx.type_ix(expected_bytes * 8));
let ptr = bx.alloca(bx.type_ix(expected_bytes * 8), Align::ONE);
bx.store(ze, ptr, Align::ONE);
let array_ty = bx.type_array(bx.type_i8(), expected_bytes);
return Ok(bx.load(array_ty, ptr, Align::ONE));
}
_ => return_error!(InvalidMonomorphization::CannotReturn {
span,
name,
ret_ty,
expected_int_bits,
expected_bytes
}),
}
}
fn simd_simple_float_intrinsic<'ll, 'tcx>(
name: Symbol,
in_elem: Ty<'_>,
in_ty: Ty<'_>,
in_len: u64,
bx: &mut Builder<'_, 'll, 'tcx>,
span: Span,
args: &[OperandRef<'tcx, &'ll Value>],
) -> Result<&'ll Value, ()> {
macro_rules! return_error {
($diag: expr) => {{
bx.sess().emit_err($diag);
return Err(());
}};
}
let (elem_ty_str, elem_ty) = if let ty::Float(f) = in_elem.kind() {
let elem_ty = bx.cx.type_float_from_ty(*f);
match f.bit_width() {
32 => ("f32", elem_ty),
64 => ("f64", elem_ty),
_ => return_error!(InvalidMonomorphization::FloatingPointVector {
span,
name,
f_ty: *f,
in_ty,
}),
}
} else {
return_error!(InvalidMonomorphization::FloatingPointType { span, name, in_ty });
};
let vec_ty = bx.type_vector(elem_ty, in_len);
let (intr_name, fn_ty) = match name {
sym::simd_ceil => ("ceil", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_fabs => ("fabs", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_fcos => ("cos", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_fexp2 => ("exp2", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_fexp => ("exp", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_flog10 => ("log10", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_flog2 => ("log2", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_flog => ("log", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_floor => ("floor", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_fma => ("fma", bx.type_func(&[vec_ty, vec_ty, vec_ty], vec_ty)),
sym::simd_fpowi => ("powi", bx.type_func(&[vec_ty, bx.type_i32()], vec_ty)),
sym::simd_fpow => ("pow", bx.type_func(&[vec_ty, vec_ty], vec_ty)),
sym::simd_fsin => ("sin", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_fsqrt => ("sqrt", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_round => ("round", bx.type_func(&[vec_ty], vec_ty)),
sym::simd_trunc => ("trunc", bx.type_func(&[vec_ty], vec_ty)),
_ => return_error!(InvalidMonomorphization::UnrecognizedIntrinsic { span, name }),
};
let llvm_name = &format!("llvm.{intr_name}.v{in_len}{elem_ty_str}");
let f = bx.declare_cfn(llvm_name, llvm::UnnamedAddr::No, fn_ty);
let c = bx.call(
fn_ty,
None,
None,
f,
&args.iter().map(|arg| arg.immediate()).collect::<Vec<_>>(),
None,
);
Ok(c)
}
if std::matches!(
name,
sym::simd_ceil
| sym::simd_fabs
| sym::simd_fcos
| sym::simd_fexp2
| sym::simd_fexp
| sym::simd_flog10
| sym::simd_flog2
| sym::simd_flog
| sym::simd_floor
| sym::simd_fma
| sym::simd_fpow
| sym::simd_fpowi
| sym::simd_fsin
| sym::simd_fsqrt
| sym::simd_round
| sym::simd_trunc
) {
return simd_simple_float_intrinsic(name, in_elem, in_ty, in_len, bx, span, args);
}
fn llvm_vector_str(bx: &Builder<'_, '_, '_>, elem_ty: Ty<'_>, vec_len: u64) -> String {
match *elem_ty.kind() {
ty::Int(v) => format!(
"v{}i{}",
vec_len,
v.normalize(bx.target_spec().pointer_width).bit_width().unwrap()
),
ty::Uint(v) => format!(
"v{}i{}",
vec_len,
v.normalize(bx.target_spec().pointer_width).bit_width().unwrap()
),
ty::Float(v) => format!("v{}f{}", vec_len, v.bit_width()),
ty::RawPtr(_) => format!("v{}p0", vec_len),
_ => unreachable!(),
}
}
fn llvm_vector_ty<'ll>(cx: &CodegenCx<'ll, '_>, elem_ty: Ty<'_>, vec_len: u64) -> &'ll Type {
let elem_ty = match *elem_ty.kind() {
ty::Int(v) => cx.type_int_from_ty(v),
ty::Uint(v) => cx.type_uint_from_ty(v),
ty::Float(v) => cx.type_float_from_ty(v),
ty::RawPtr(_) => cx.type_ptr(),
_ => unreachable!(),
};
cx.type_vector(elem_ty, vec_len)
}
if name == sym::simd_gather {
require_simd!(in_ty, InvalidMonomorphization::SimdFirst { span, name, ty: in_ty });
require_simd!(
arg_tys[1],
InvalidMonomorphization::SimdSecond { span, name, ty: arg_tys[1] }
);
require_simd!(
arg_tys[2],
InvalidMonomorphization::SimdThird { span, name, ty: arg_tys[2] }
);
require_simd!(ret_ty, InvalidMonomorphization::SimdReturn { span, name, ty: ret_ty });
let (out_len, _) = arg_tys[1].simd_size_and_type(bx.tcx());
let (out_len2, _) = arg_tys[2].simd_size_and_type(bx.tcx());
require!(
in_len == out_len,
InvalidMonomorphization::SecondArgumentLength {
span,
name,
in_len,
in_ty,
arg_ty: arg_tys[1],
out_len
}
);
require!(
in_len == out_len2,
InvalidMonomorphization::ThirdArgumentLength {
span,
name,
in_len,
in_ty,
arg_ty: arg_tys[2],
out_len: out_len2
}
);
require!(
ret_ty == in_ty,
InvalidMonomorphization::ExpectedReturnType { span, name, in_ty, ret_ty }
);
let (_, element_ty0) = arg_tys[0].simd_size_and_type(bx.tcx());
let (_, element_ty1) = arg_tys[1].simd_size_and_type(bx.tcx());
require!(
matches!(
element_ty1.kind(),
ty::RawPtr(p) if p.ty == in_elem && p.ty.kind() == element_ty0.kind()
),
InvalidMonomorphization::ExpectedElementType {
span,
name,
expected_element: element_ty1,
second_arg: arg_tys[1],
in_elem,
in_ty,
mutability: ExpectedPointerMutability::Not,
}
);
let (_, element_ty2) = arg_tys[2].simd_size_and_type(bx.tcx());
match element_ty2.kind() {
ty::Int(_) => (),
_ => {
require!(
false,
InvalidMonomorphization::ThirdArgElementType {
span,
name,
expected_element: element_ty2,
third_arg: arg_tys[2]
}
);
}
}
let alignment_ty = bx.type_i32();
let alignment = bx.const_i32(bx.align_of(in_elem).bytes() as i32);
let (mask, mask_ty) = {
let i1 = bx.type_i1();
let i1xn = bx.type_vector(i1, in_len);
(bx.trunc(args[2].immediate(), i1xn), i1xn)
};
let llvm_pointer_vec_ty = llvm_vector_ty(bx, element_ty1, in_len);
let llvm_pointer_vec_str = llvm_vector_str(bx, element_ty1, in_len);
let llvm_elem_vec_ty = llvm_vector_ty(bx, element_ty0, in_len);
let llvm_elem_vec_str = llvm_vector_str(bx, element_ty0, in_len);
let llvm_intrinsic =
format!("llvm.masked.gather.{llvm_elem_vec_str}.{llvm_pointer_vec_str}");
let fn_ty = bx.type_func(
&[llvm_pointer_vec_ty, alignment_ty, mask_ty, llvm_elem_vec_ty],
llvm_elem_vec_ty,
);
let f = bx.declare_cfn(&llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty);
let v = bx.call(
fn_ty,
None,
None,
f,
&[args[1].immediate(), alignment, mask, args[0].immediate()],
None,
);
return Ok(v);
}
if name == sym::simd_scatter {
require_simd!(in_ty, InvalidMonomorphization::SimdFirst { span, name, ty: in_ty });
require_simd!(
arg_tys[1],
InvalidMonomorphization::SimdSecond { span, name, ty: arg_tys[1] }
);
require_simd!(
arg_tys[2],
InvalidMonomorphization::SimdThird { span, name, ty: arg_tys[2] }
);
let (element_len1, _) = arg_tys[1].simd_size_and_type(bx.tcx());
let (element_len2, _) = arg_tys[2].simd_size_and_type(bx.tcx());
require!(
in_len == element_len1,
InvalidMonomorphization::SecondArgumentLength {
span,
name,
in_len,
in_ty,
arg_ty: arg_tys[1],
out_len: element_len1
}
);
require!(
in_len == element_len2,
InvalidMonomorphization::ThirdArgumentLength {
span,
name,
in_len,
in_ty,
arg_ty: arg_tys[2],
out_len: element_len2
}
);
let (_, element_ty0) = arg_tys[0].simd_size_and_type(bx.tcx());
let (_, element_ty1) = arg_tys[1].simd_size_and_type(bx.tcx());
let (_, element_ty2) = arg_tys[2].simd_size_and_type(bx.tcx());
require!(
matches!(
element_ty1.kind(),
ty::RawPtr(p)
if p.ty == in_elem && p.mutbl.is_mut() && p.ty.kind() == element_ty0.kind()
),
InvalidMonomorphization::ExpectedElementType {
span,
name,
expected_element: element_ty1,
second_arg: arg_tys[1],
in_elem,
in_ty,
mutability: ExpectedPointerMutability::Mut,
}
);
match element_ty2.kind() {
ty::Int(_) => (),
_ => {
require!(
false,
InvalidMonomorphization::ThirdArgElementType {
span,
name,
expected_element: element_ty2,
third_arg: arg_tys[2]
}
);
}
}
let alignment_ty = bx.type_i32();
let alignment = bx.const_i32(bx.align_of(in_elem).bytes() as i32);
let (mask, mask_ty) = {
let i1 = bx.type_i1();
let i1xn = bx.type_vector(i1, in_len);
(bx.trunc(args[2].immediate(), i1xn), i1xn)
};
let ret_t = bx.type_void();
let llvm_pointer_vec_ty = llvm_vector_ty(bx, element_ty1, in_len);
let llvm_pointer_vec_str = llvm_vector_str(bx, element_ty1, in_len);
let llvm_elem_vec_ty = llvm_vector_ty(bx, element_ty0, in_len);
let llvm_elem_vec_str = llvm_vector_str(bx, element_ty0, in_len);
let llvm_intrinsic =
format!("llvm.masked.scatter.{llvm_elem_vec_str}.{llvm_pointer_vec_str}");
let fn_ty =
bx.type_func(&[llvm_elem_vec_ty, llvm_pointer_vec_ty, alignment_ty, mask_ty], ret_t);
let f = bx.declare_cfn(&llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty);
let v = bx.call(
fn_ty,
None,
None,
f,
&[args[0].immediate(), args[1].immediate(), alignment, mask],
None,
);
return Ok(v);
}
macro_rules! arith_red {
($name:ident : $integer_reduce:ident, $float_reduce:ident, $ordered:expr, $op:ident,
$identity:expr) => {
if name == sym::$name {
require!(
ret_ty == in_elem,
InvalidMonomorphization::ReturnType { span, name, in_elem, in_ty, ret_ty }
);
return match in_elem.kind() {
ty::Int(_) | ty::Uint(_) => {
let r = bx.$integer_reduce(args[0].immediate());
if $ordered {
Ok(bx.$op(args[1].immediate(), r))
} else {
Ok(bx.$integer_reduce(args[0].immediate()))
}
}
ty::Float(f) => {
let acc = if $ordered {
args[1].immediate()
} else {
match f.bit_width() {
32 => bx.const_real(bx.type_f32(), $identity),
64 => bx.const_real(bx.type_f64(), $identity),
v => return_error!(
InvalidMonomorphization::UnsupportedSymbolOfSize {
span,
name,
symbol: sym::$name,
in_ty,
in_elem,
size: v,
ret_ty
}
),
}
};
Ok(bx.$float_reduce(acc, args[0].immediate()))
}
_ => return_error!(InvalidMonomorphization::UnsupportedSymbol {
span,
name,
symbol: sym::$name,
in_ty,
in_elem,
ret_ty
}),
};
}
};
}
arith_red!(simd_reduce_add_ordered: vector_reduce_add, vector_reduce_fadd, true, add, 0.0);
arith_red!(simd_reduce_mul_ordered: vector_reduce_mul, vector_reduce_fmul, true, mul, 1.0);
arith_red!(
simd_reduce_add_unordered: vector_reduce_add,
vector_reduce_fadd_fast,
false,
add,
0.0
);
arith_red!(
simd_reduce_mul_unordered: vector_reduce_mul,
vector_reduce_fmul_fast,
false,
mul,
1.0
);
macro_rules! minmax_red {
($name:ident: $int_red:ident, $float_red:ident) => {
if name == sym::$name {
require!(
ret_ty == in_elem,
InvalidMonomorphization::ReturnType { span, name, in_elem, in_ty, ret_ty }
);
return match in_elem.kind() {
ty::Int(_i) => Ok(bx.$int_red(args[0].immediate(), true)),
ty::Uint(_u) => Ok(bx.$int_red(args[0].immediate(), false)),
ty::Float(_f) => Ok(bx.$float_red(args[0].immediate())),
_ => return_error!(InvalidMonomorphization::UnsupportedSymbol {
span,
name,
symbol: sym::$name,
in_ty,
in_elem,
ret_ty
}),
};
}
};
}
minmax_red!(simd_reduce_min: vector_reduce_min, vector_reduce_fmin);
minmax_red!(simd_reduce_max: vector_reduce_max, vector_reduce_fmax);
minmax_red!(simd_reduce_min_nanless: vector_reduce_min, vector_reduce_fmin_fast);
minmax_red!(simd_reduce_max_nanless: vector_reduce_max, vector_reduce_fmax_fast);
macro_rules! bitwise_red {
($name:ident : $red:ident, $boolean:expr) => {
if name == sym::$name {
let input = if !$boolean {
require!(
ret_ty == in_elem,
InvalidMonomorphization::ReturnType { span, name, in_elem, in_ty, ret_ty }
);
args[0].immediate()
} else {
match in_elem.kind() {
ty::Int(_) | ty::Uint(_) => {}
_ => return_error!(InvalidMonomorphization::UnsupportedSymbol {
span,
name,
symbol: sym::$name,
in_ty,
in_elem,
ret_ty
}),
}
let i1 = bx.type_i1();
let i1xn = bx.type_vector(i1, in_len as u64);
bx.trunc(args[0].immediate(), i1xn)
};
return match in_elem.kind() {
ty::Int(_) | ty::Uint(_) => {
let r = bx.$red(input);
Ok(if !$boolean { r } else { bx.zext(r, bx.type_bool()) })
}
_ => return_error!(InvalidMonomorphization::UnsupportedSymbol {
span,
name,
symbol: sym::$name,
in_ty,
in_elem,
ret_ty
}),
};
}
};
}
bitwise_red!(simd_reduce_and: vector_reduce_and, false);
bitwise_red!(simd_reduce_or: vector_reduce_or, false);
bitwise_red!(simd_reduce_xor: vector_reduce_xor, false);
bitwise_red!(simd_reduce_all: vector_reduce_and, true);
bitwise_red!(simd_reduce_any: vector_reduce_or, true);
if name == sym::simd_cast_ptr {
require_simd!(ret_ty, InvalidMonomorphization::SimdReturn { span, name, ty: ret_ty });
let (out_len, out_elem) = ret_ty.simd_size_and_type(bx.tcx());
require!(
in_len == out_len,
InvalidMonomorphization::ReturnLengthInputType {
span,
name,
in_len,
in_ty,
ret_ty,
out_len
}
);
match in_elem.kind() {
ty::RawPtr(p) => {
let (metadata, check_sized) = p.ty.ptr_metadata_ty(bx.tcx, |ty| {
bx.tcx.normalize_erasing_regions(ty::ParamEnv::reveal_all(), ty)
});
assert!(!check_sized); require!(
metadata.is_unit(),
InvalidMonomorphization::CastFatPointer { span, name, ty: in_elem }
);
}
_ => {
return_error!(InvalidMonomorphization::ExpectedPointer { span, name, ty: in_elem })
}
}
match out_elem.kind() {
ty::RawPtr(p) => {
let (metadata, check_sized) = p.ty.ptr_metadata_ty(bx.tcx, |ty| {
bx.tcx.normalize_erasing_regions(ty::ParamEnv::reveal_all(), ty)
});
assert!(!check_sized); require!(
metadata.is_unit(),
InvalidMonomorphization::CastFatPointer { span, name, ty: out_elem }
);
}
_ => {
return_error!(InvalidMonomorphization::ExpectedPointer { span, name, ty: out_elem })
}
}
return Ok(args[0].immediate());
}
if name == sym::simd_expose_addr {
require_simd!(ret_ty, InvalidMonomorphization::SimdReturn { span, name, ty: ret_ty });
let (out_len, out_elem) = ret_ty.simd_size_and_type(bx.tcx());
require!(
in_len == out_len,
InvalidMonomorphization::ReturnLengthInputType {
span,
name,
in_len,
in_ty,
ret_ty,
out_len
}
);
match in_elem.kind() {
ty::RawPtr(_) => {}
_ => {
return_error!(InvalidMonomorphization::ExpectedPointer { span, name, ty: in_elem })
}
}
match out_elem.kind() {
ty::Uint(ty::UintTy::Usize) => {}
_ => return_error!(InvalidMonomorphization::ExpectedUsize { span, name, ty: out_elem }),
}
return Ok(bx.ptrtoint(args[0].immediate(), llret_ty));
}
if name == sym::simd_from_exposed_addr {
require_simd!(ret_ty, InvalidMonomorphization::SimdReturn { span, name, ty: ret_ty });
let (out_len, out_elem) = ret_ty.simd_size_and_type(bx.tcx());
require!(
in_len == out_len,
InvalidMonomorphization::ReturnLengthInputType {
span,
name,
in_len,
in_ty,
ret_ty,
out_len
}
);
match in_elem.kind() {
ty::Uint(ty::UintTy::Usize) => {}
_ => return_error!(InvalidMonomorphization::ExpectedUsize { span, name, ty: in_elem }),
}
match out_elem.kind() {
ty::RawPtr(_) => {}
_ => {
return_error!(InvalidMonomorphization::ExpectedPointer { span, name, ty: out_elem })
}
}
return Ok(bx.inttoptr(args[0].immediate(), llret_ty));
}
if name == sym::simd_cast || name == sym::simd_as {
require_simd!(ret_ty, InvalidMonomorphization::SimdReturn { span, name, ty: ret_ty });
let (out_len, out_elem) = ret_ty.simd_size_and_type(bx.tcx());
require!(
in_len == out_len,
InvalidMonomorphization::ReturnLengthInputType {
span,
name,
in_len,
in_ty,
ret_ty,
out_len
}
);
if in_elem == out_elem {
return Ok(args[0].immediate());
}
enum Style {
Float,
Int(bool),
Unsupported,
}
let (in_style, in_width) = match in_elem.kind() {
ty::Int(i) => (
Style::Int(true),
i.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
),
ty::Uint(u) => (
Style::Int(false),
u.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
),
ty::Float(f) => (Style::Float, f.bit_width()),
_ => (Style::Unsupported, 0),
};
let (out_style, out_width) = match out_elem.kind() {
ty::Int(i) => (
Style::Int(true),
i.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
),
ty::Uint(u) => (
Style::Int(false),
u.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
),
ty::Float(f) => (Style::Float, f.bit_width()),
_ => (Style::Unsupported, 0),
};
match (in_style, out_style) {
(Style::Int(in_is_signed), Style::Int(_)) => {
return Ok(match in_width.cmp(&out_width) {
Ordering::Greater => bx.trunc(args[0].immediate(), llret_ty),
Ordering::Equal => args[0].immediate(),
Ordering::Less => {
if in_is_signed {
bx.sext(args[0].immediate(), llret_ty)
} else {
bx.zext(args[0].immediate(), llret_ty)
}
}
});
}
(Style::Int(in_is_signed), Style::Float) => {
return Ok(if in_is_signed {
bx.sitofp(args[0].immediate(), llret_ty)
} else {
bx.uitofp(args[0].immediate(), llret_ty)
});
}
(Style::Float, Style::Int(out_is_signed)) => {
return Ok(match (out_is_signed, name == sym::simd_as) {
(false, false) => bx.fptoui(args[0].immediate(), llret_ty),
(true, false) => bx.fptosi(args[0].immediate(), llret_ty),
(_, true) => bx.cast_float_to_int(out_is_signed, args[0].immediate(), llret_ty),
});
}
(Style::Float, Style::Float) => {
return Ok(match in_width.cmp(&out_width) {
Ordering::Greater => bx.fptrunc(args[0].immediate(), llret_ty),
Ordering::Equal => args[0].immediate(),
Ordering::Less => bx.fpext(args[0].immediate(), llret_ty),
});
}
_ => { }
}
require!(
false,
InvalidMonomorphization::UnsupportedCast {
span,
name,
in_ty,
in_elem,
ret_ty,
out_elem
}
);
}
macro_rules! arith_binary {
($($name: ident: $($($p: ident),* => $call: ident),*;)*) => {
$(if name == sym::$name {
match in_elem.kind() {
$($(ty::$p(_))|* => {
return Ok(bx.$call(args[0].immediate(), args[1].immediate()))
})*
_ => {},
}
require!(
false,
InvalidMonomorphization::UnsupportedOperation { span, name, in_ty, in_elem }
);
})*
}
}
arith_binary! {
simd_add: Uint, Int => add, Float => fadd;
simd_sub: Uint, Int => sub, Float => fsub;
simd_mul: Uint, Int => mul, Float => fmul;
simd_div: Uint => udiv, Int => sdiv, Float => fdiv;
simd_rem: Uint => urem, Int => srem, Float => frem;
simd_shl: Uint, Int => shl;
simd_shr: Uint => lshr, Int => ashr;
simd_and: Uint, Int => and;
simd_or: Uint, Int => or;
simd_xor: Uint, Int => xor;
simd_fmax: Float => maxnum;
simd_fmin: Float => minnum;
}
macro_rules! arith_unary {
($($name: ident: $($($p: ident),* => $call: ident),*;)*) => {
$(if name == sym::$name {
match in_elem.kind() {
$($(ty::$p(_))|* => {
return Ok(bx.$call(args[0].immediate()))
})*
_ => {},
}
require!(
false,
InvalidMonomorphization::UnsupportedOperation { span, name, in_ty, in_elem }
);
})*
}
}
arith_unary! {
simd_neg: Int => neg, Float => fneg;
}
if matches!(name, sym::simd_bswap | sym::simd_bitreverse | sym::simd_ctlz | sym::simd_cttz) {
let vec_ty = bx.cx.type_vector(
match *in_elem.kind() {
ty::Int(i) => bx.cx.type_int_from_ty(i),
ty::Uint(i) => bx.cx.type_uint_from_ty(i),
_ => return_error!(InvalidMonomorphization::UnsupportedOperation {
span,
name,
in_ty,
in_elem
}),
},
in_len as u64,
);
let intrinsic_name = match name {
sym::simd_bswap => "bswap",
sym::simd_bitreverse => "bitreverse",
sym::simd_ctlz => "ctlz",
sym::simd_cttz => "cttz",
_ => unreachable!(),
};
let int_size = in_elem.int_size_and_signed(bx.tcx()).0.bits();
let llvm_intrinsic = &format!("llvm.{}.v{}i{}", intrinsic_name, in_len, int_size,);
return if name == sym::simd_bswap && int_size == 8 {
Ok(args[0].immediate())
} else if matches!(name, sym::simd_ctlz | sym::simd_cttz) {
let fn_ty = bx.type_func(&[vec_ty, bx.type_i1()], vec_ty);
let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty);
Ok(bx.call(
fn_ty,
None,
None,
f,
&[args[0].immediate(), bx.const_int(bx.type_i1(), 0)],
None,
))
} else {
let fn_ty = bx.type_func(&[vec_ty], vec_ty);
let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty);
Ok(bx.call(fn_ty, None, None, f, &[args[0].immediate()], None))
};
}
if name == sym::simd_arith_offset {
let pointee = in_elem.builtin_deref(true).unwrap_or_else(|| {
span_bug!(span, "must be called with a vector of pointer types as first argument")
});
let layout = bx.layout_of(pointee.ty);
let ptrs = args[0].immediate();
let (_offsets_len, offsets_elem) = arg_tys[1].simd_size_and_type(bx.tcx());
if !matches!(offsets_elem.kind(), ty::Int(ty::IntTy::Isize) | ty::Uint(ty::UintTy::Usize)) {
span_bug!(
span,
"must be called with a vector of pointer-sized integers as second argument"
);
}
let offsets = args[1].immediate();
return Ok(bx.gep(bx.backend_type(layout), ptrs, &[offsets]));
}
if name == sym::simd_saturating_add || name == sym::simd_saturating_sub {
let lhs = args[0].immediate();
let rhs = args[1].immediate();
let is_add = name == sym::simd_saturating_add;
let ptr_bits = bx.tcx().data_layout.pointer_size.bits() as _;
let (signed, elem_width, elem_ty) = match *in_elem.kind() {
ty::Int(i) => (true, i.bit_width().unwrap_or(ptr_bits), bx.cx.type_int_from_ty(i)),
ty::Uint(i) => (false, i.bit_width().unwrap_or(ptr_bits), bx.cx.type_uint_from_ty(i)),
_ => {
return_error!(InvalidMonomorphization::ExpectedVectorElementType {
span,
name,
expected_element: arg_tys[0].simd_size_and_type(bx.tcx()).1,
vector_type: arg_tys[0]
});
}
};
let llvm_intrinsic = &format!(
"llvm.{}{}.sat.v{}i{}",
if signed { 's' } else { 'u' },
if is_add { "add" } else { "sub" },
in_len,
elem_width
);
let vec_ty = bx.cx.type_vector(elem_ty, in_len as u64);
let fn_ty = bx.type_func(&[vec_ty, vec_ty], vec_ty);
let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty);
let v = bx.call(fn_ty, None, None, f, &[lhs, rhs], None);
return Ok(v);
}
span_bug!(span, "unknown SIMD intrinsic");
}
fn int_type_width_signed(ty: Ty<'_>, cx: &CodegenCx<'_, '_>) -> Option<(u64, bool)> {
match ty.kind() {
ty::Int(t) => {
Some((t.bit_width().unwrap_or(u64::from(cx.tcx.sess.target.pointer_width)), true))
}
ty::Uint(t) => {
Some((t.bit_width().unwrap_or(u64::from(cx.tcx.sess.target.pointer_width)), false))
}
_ => None,
}
}