// option. This file may not be copied, modified, or distributed
// except according to those terms.
-use llvm::{self, LLVMConstInBoundsGEP};
use rustc::ty::{self, Ty};
-use rustc::ty::layout::{self, Align, TyLayout, LayoutOf, Size};
+use rustc::ty::layout::{self, Align, TyLayout, LayoutOf, VariantIdx, HasTyCtxt};
use rustc::mir;
use rustc::mir::tcx::PlaceTy;
-use base;
-use builder::Builder;
-use common::{CodegenCx, C_undef, C_usize, C_u8, C_u32, C_uint, C_null, C_uint_big};
-use consts;
+use builder::MemFlags;
+use rustc_codegen_ssa::common::IntPredicate;
use type_of::LayoutLlvmExt;
-use type_::Type;
-use value::Value;
use glue;
-use mir::constant::const_alloc_to_llvm;
+
+use interfaces::*;
use super::{FunctionCx, LocalRef};
-use super::operand::{OperandRef, OperandValue};
+use super::operand::OperandValue;
#[derive(Copy, Clone, Debug)]
-pub struct PlaceRef<'ll, 'tcx> {
+pub struct PlaceRef<'tcx, V> {
/// Pointer to the contents of the place
- pub llval: &'ll Value,
+ pub llval: V,
/// This place's extra data if it is unsized, or null
- pub llextra: Option<&'ll Value>,
+ pub llextra: Option<V>,
/// Monomorphized type of this place, including variant information
pub layout: TyLayout<'tcx>,
pub align: Align,
}
-impl PlaceRef<'ll, 'tcx> {
+impl<'a, 'tcx: 'a, V: CodegenObject> PlaceRef<'tcx, V> {
pub fn new_sized(
- llval: &'ll Value,
+ llval: V,
layout: TyLayout<'tcx>,
align: Align,
- ) -> PlaceRef<'ll, 'tcx> {
+ ) -> PlaceRef<'tcx, V> {
assert!(!layout.is_unsized());
PlaceRef {
llval,
}
}
- pub fn from_const_alloc(
- bx: &Builder<'a, 'll, 'tcx>,
+ pub fn alloca<Bx: BuilderMethods<'a, 'tcx, Value = V>>(
+ bx: &Bx,
layout: TyLayout<'tcx>,
- alloc: &mir::interpret::Allocation,
- offset: Size,
- ) -> PlaceRef<'ll, 'tcx> {
- let init = const_alloc_to_llvm(bx.cx, alloc);
- let base_addr = consts::addr_of(bx.cx, init, layout.align, None);
-
- let llval = unsafe { LLVMConstInBoundsGEP(
- consts::bitcast(base_addr, Type::i8p(bx.cx)),
- &C_usize(bx.cx, offset.bytes()),
- 1,
- )};
- let llval = consts::bitcast(llval, layout.llvm_type(bx.cx).ptr_to());
- PlaceRef::new_sized(llval, layout, alloc.align)
- }
-
- pub fn alloca(bx: &Builder<'a, 'll, 'tcx>, layout: TyLayout<'tcx>, name: &str)
- -> PlaceRef<'ll, 'tcx> {
+ name: &str
+ ) -> Self {
debug!("alloca({:?}: {:?})", name, layout);
assert!(!layout.is_unsized(), "tried to statically allocate unsized place");
- let tmp = bx.alloca(layout.llvm_type(bx.cx), name, layout.align);
+ let tmp = bx.alloca(bx.cx().backend_type(layout), name, layout.align);
Self::new_sized(tmp, layout, layout.align)
}
/// Returns a place for an indirect reference to an unsized place.
- pub fn alloca_unsized_indirect(bx: &Builder<'a, 'll, 'tcx>, layout: TyLayout<'tcx>, name: &str)
- -> PlaceRef<'ll, 'tcx> {
+ pub fn alloca_unsized_indirect<Bx: BuilderMethods<'a, 'tcx, Value = V>>(
+ bx: &Bx,
+ layout: TyLayout<'tcx>,
+ name: &str,
+ ) -> Self {
debug!("alloca_unsized_indirect({:?}: {:?})", name, layout);
assert!(layout.is_unsized(), "tried to allocate indirect place for sized values");
- let ptr_ty = bx.cx.tcx.mk_mut_ptr(layout.ty);
- let ptr_layout = bx.cx.layout_of(ptr_ty);
+ let ptr_ty = bx.cx().tcx().mk_mut_ptr(layout.ty);
+ let ptr_layout = bx.cx().layout_of(ptr_ty);
Self::alloca(bx, ptr_layout, name)
}
- pub fn len(&self, cx: &CodegenCx<'ll, 'tcx>) -> &'ll Value {
+ pub fn len<Cx: CodegenMethods<'tcx, Value = V>>(
+ &self,
+ cx: &Cx
+ ) -> V {
if let layout::FieldPlacement::Array { count, .. } = self.layout.fields {
if self.layout.is_unsized() {
assert_eq!(count, 0);
self.llextra.unwrap()
} else {
- C_usize(cx, count)
+ cx.const_usize(count)
}
} else {
bug!("unexpected layout `{:#?}` in PlaceRef::len", self.layout)
}
}
- pub fn load(&self, bx: &Builder<'a, 'll, 'tcx>) -> OperandRef<'ll, 'tcx> {
- debug!("PlaceRef::load: {:?}", self);
-
- assert_eq!(self.llextra.is_some(), self.layout.is_unsized());
-
- if self.layout.is_zst() {
- return OperandRef::new_zst(bx.cx, self.layout);
- }
-
- let scalar_load_metadata = |load, scalar: &layout::Scalar| {
- let vr = scalar.valid_range.clone();
- match scalar.value {
- layout::Int(..) => {
- let range = scalar.valid_range_exclusive(bx.cx);
- if range.start != range.end {
- bx.range_metadata(load, range);
- }
- }
- layout::Pointer if vr.start() < vr.end() && !vr.contains(&0) => {
- bx.nonnull_metadata(load);
- }
- _ => {}
- }
- };
-
- let val = if let Some(llextra) = self.llextra {
- OperandValue::Ref(self.llval, Some(llextra), self.align)
- } else if self.layout.is_llvm_immediate() {
- let mut const_llval = None;
- unsafe {
- if let Some(global) = llvm::LLVMIsAGlobalVariable(self.llval) {
- if llvm::LLVMIsGlobalConstant(global) == llvm::True {
- const_llval = llvm::LLVMGetInitializer(global);
- }
- }
- }
- let llval = const_llval.unwrap_or_else(|| {
- let load = bx.load(self.llval, self.align);
- if let layout::Abi::Scalar(ref scalar) = self.layout.abi {
- scalar_load_metadata(load, scalar);
- }
- load
- });
- OperandValue::Immediate(base::to_immediate(bx, llval, self.layout))
- } else if let layout::Abi::ScalarPair(ref a, ref b) = self.layout.abi {
- let load = |i, scalar: &layout::Scalar| {
- let llptr = bx.struct_gep(self.llval, i as u64);
- let load = bx.load(llptr, self.align);
- scalar_load_metadata(load, scalar);
- if scalar.is_bool() {
- bx.trunc(load, Type::i1(bx.cx))
- } else {
- load
- }
- };
- OperandValue::Pair(load(0, a), load(1, b))
- } else {
- OperandValue::Ref(self.llval, None, self.align)
- };
-
- OperandRef { val, layout: self.layout }
- }
+}
+impl<'a, 'tcx: 'a, V: CodegenObject> PlaceRef<'tcx, V> {
/// Access a field, at a point when the value's case is known.
- pub fn project_field(self, bx: &Builder<'a, 'll, 'tcx>, ix: usize) -> PlaceRef<'ll, 'tcx> {
- let cx = bx.cx;
+ pub fn project_field<Bx: BuilderMethods<'a, 'tcx, Value = V>>(
+ self, bx: &Bx,
+ ix: usize,
+ ) -> Self {
+ let cx = bx.cx();
let field = self.layout.field(cx, ix);
let offset = self.layout.fields.offset(ix);
let effective_field_align = self.align.restrict_for_offset(offset);
};
PlaceRef {
// HACK(eddyb) have to bitcast pointers until LLVM removes pointee types.
- llval: bx.pointercast(llval, field.llvm_type(cx).ptr_to()),
+ llval: bx.pointercast(llval, cx.type_ptr_to(cx.backend_type(field))),
llextra: if cx.type_has_metadata(field.ty) {
self.llextra
} else {
let meta = self.llextra;
- let unaligned_offset = C_usize(cx, offset.bytes());
+ let unaligned_offset = cx.const_usize(offset.bytes());
// Get the alignment of the field
let (_, unsized_align) = glue::size_and_align_of_dst(bx, field.ty, meta);
// (unaligned offset + (align - 1)) & -align
// Calculate offset
- let align_sub_1 = bx.sub(unsized_align, C_usize(cx, 1u64));
+ let align_sub_1 = bx.sub(unsized_align, cx.const_usize(1u64));
let offset = bx.and(bx.add(unaligned_offset, align_sub_1),
bx.neg(unsized_align));
debug!("struct_field_ptr: DST field offset: {:?}", offset);
// Cast and adjust pointer
- let byte_ptr = bx.pointercast(self.llval, Type::i8p(cx));
+ let byte_ptr = bx.pointercast(self.llval, cx.type_i8p());
let byte_ptr = bx.gep(byte_ptr, &[offset]);
// Finally, cast back to the type expected
- let ll_fty = field.llvm_type(cx);
+ let ll_fty = cx.backend_type(field);
debug!("struct_field_ptr: Field type is {:?}", ll_fty);
PlaceRef {
- llval: bx.pointercast(byte_ptr, ll_fty.ptr_to()),
+ llval: bx.pointercast(byte_ptr, bx.cx().type_ptr_to(ll_fty)),
llextra: self.llextra,
layout: field,
align: effective_field_align,
}
/// Obtain the actual discriminant of a value.
- pub fn codegen_get_discr(self, bx: &Builder<'a, 'll, 'tcx>, cast_to: Ty<'tcx>) -> &'ll Value {
- let cast_to = bx.cx.layout_of(cast_to).immediate_llvm_type(bx.cx);
+ pub fn codegen_get_discr<Bx: BuilderMethods<'a, 'tcx, Value = V>>(
+ self,
+ bx: &Bx,
+ cast_to: Ty<'tcx>
+ ) -> V {
+ let cast_to = bx.cx().immediate_backend_type(bx.cx().layout_of(cast_to));
if self.layout.abi.is_uninhabited() {
- return C_undef(cast_to);
+ return bx.cx().const_undef(cast_to);
}
match self.layout.variants {
layout::Variants::Single { index } => {
let discr_val = self.layout.ty.ty_adt_def().map_or(
- index as u128,
- |def| def.discriminant_for_variant(bx.cx.tcx, index).val);
- return C_uint_big(cast_to, discr_val);
+ index.as_u32() as u128,
+ |def| def.discriminant_for_variant(bx.cx().tcx(), index).val);
+ return bx.cx().const_uint_big(cast_to, discr_val);
}
layout::Variants::Tagged { .. } |
layout::Variants::NicheFilling { .. } => {},
}
let discr = self.project_field(bx, 0);
- let lldiscr = discr.load(bx).immediate();
+ let lldiscr = bx.load_operand(discr).immediate();
match self.layout.variants {
layout::Variants::Single { .. } => bug!(),
layout::Variants::Tagged { ref tag, .. } => {
niche_start,
..
} => {
- let niche_llty = discr.layout.immediate_llvm_type(bx.cx);
+ let niche_llty = bx.cx().immediate_backend_type(discr.layout);
if niche_variants.start() == niche_variants.end() {
// FIXME(eddyb) Check the actual primitive type here.
let niche_llval = if niche_start == 0 {
- // HACK(eddyb) Using `C_null` as it works on all types.
- C_null(niche_llty)
+ // HACK(eddyb) Using `c_null` as it works on all types.
+ bx.cx().const_null(niche_llty)
} else {
- C_uint_big(niche_llty, niche_start)
+ bx.cx().const_uint_big(niche_llty, niche_start)
};
- bx.select(bx.icmp(llvm::IntEQ, lldiscr, niche_llval),
- C_uint(cast_to, *niche_variants.start() as u64),
- C_uint(cast_to, dataful_variant as u64))
+ bx.select(bx.icmp(IntPredicate::IntEQ, lldiscr, niche_llval),
+ bx.cx().const_uint(cast_to, niche_variants.start().as_u32() as u64),
+ bx.cx().const_uint(cast_to, dataful_variant.as_u32() as u64))
} else {
// Rebase from niche values to discriminant values.
- let delta = niche_start.wrapping_sub(*niche_variants.start() as u128);
- let lldiscr = bx.sub(lldiscr, C_uint_big(niche_llty, delta));
- let lldiscr_max = C_uint(niche_llty, *niche_variants.end() as u64);
- bx.select(bx.icmp(llvm::IntULE, lldiscr, lldiscr_max),
+ let delta = niche_start.wrapping_sub(niche_variants.start().as_u32() as u128);
+ let lldiscr = bx.sub(lldiscr, bx.cx().const_uint_big(niche_llty, delta));
+ let lldiscr_max =
+ bx.cx().const_uint(niche_llty, niche_variants.end().as_u32() as u64);
+ bx.select(bx.icmp(IntPredicate::IntULE, lldiscr, lldiscr_max),
bx.intcast(lldiscr, cast_to, false),
- C_uint(cast_to, dataful_variant as u64))
+ bx.cx().const_uint(cast_to, dataful_variant.as_u32() as u64))
}
}
}
/// Set the discriminant for a new value of the given case of the given
/// representation.
- pub fn codegen_set_discr(&self, bx: &Builder<'a, 'll, 'tcx>, variant_index: usize) {
- if self.layout.for_variant(bx.cx, variant_index).abi.is_uninhabited() {
+ pub fn codegen_set_discr<Bx: BuilderMethods<'a, 'tcx, Value = V>>(
+ &self,
+ bx: &Bx,
+ variant_index: VariantIdx
+ ) {
+ if self.layout.for_variant(bx.cx(), variant_index).abi.is_uninhabited() {
return;
}
match self.layout.variants {
.discriminant_for_variant(bx.tcx(), variant_index)
.val;
bx.store(
- C_uint_big(ptr.layout.llvm_type(bx.cx), to),
+ bx.cx().const_uint_big(bx.cx().backend_type(ptr.layout), to),
ptr.llval,
ptr.align);
}
..
} => {
if variant_index != dataful_variant {
- if bx.sess().target.target.arch == "arm" ||
- bx.sess().target.target.arch == "aarch64" {
+ if bx.cx().sess().target.target.arch == "arm" ||
+ bx.cx().sess().target.target.arch == "aarch64" {
// Issue #34427: As workaround for LLVM bug on ARM,
// use memset of 0 before assigning niche value.
- let llptr = bx.pointercast(self.llval, Type::i8(bx.cx).ptr_to());
- let fill_byte = C_u8(bx.cx, 0);
+ let fill_byte = bx.cx().const_u8(0);
let (size, align) = self.layout.size_and_align();
- let size = C_usize(bx.cx, size.bytes());
- let align = C_u32(bx.cx, align.abi() as u32);
- base::call_memset(bx, llptr, fill_byte, size, align, false);
+ let size = bx.cx().const_usize(size.bytes());
+ bx.memset(self.llval, fill_byte, size, align, MemFlags::empty());
}
let niche = self.project_field(bx, 0);
- let niche_llty = niche.layout.immediate_llvm_type(bx.cx);
- let niche_value = ((variant_index - *niche_variants.start()) as u128)
+ let niche_llty = bx.cx().immediate_backend_type(niche.layout);
+ let niche_value = variant_index.as_u32() - niche_variants.start().as_u32();
+ let niche_value = (niche_value as u128)
.wrapping_add(niche_start);
// FIXME(eddyb) Check the actual primitive type here.
let niche_llval = if niche_value == 0 {
- // HACK(eddyb) Using `C_null` as it works on all types.
- C_null(niche_llty)
+ // HACK(eddyb) Using `c_null` as it works on all types.
+ bx.cx().const_null(niche_llty)
} else {
- C_uint_big(niche_llty, niche_value)
+ bx.cx().const_uint_big(niche_llty, niche_value)
};
OperandValue::Immediate(niche_llval).store(bx, niche);
}
}
}
- pub fn project_index(&self, bx: &Builder<'a, 'll, 'tcx>, llindex: &'ll Value)
- -> PlaceRef<'ll, 'tcx> {
+ pub fn project_index<Bx: BuilderMethods<'a, 'tcx, Value = V>>(
+ &self,
+ bx: &Bx,
+ llindex: V
+ ) -> Self {
PlaceRef {
- llval: bx.inbounds_gep(self.llval, &[C_usize(bx.cx, 0), llindex]),
+ llval: bx.inbounds_gep(self.llval, &[bx.cx().const_usize(0), llindex]),
llextra: None,
- layout: self.layout.field(bx.cx, 0),
+ layout: self.layout.field(bx.cx(), 0),
align: self.align
}
}
- pub fn project_downcast(&self, bx: &Builder<'a, 'll, 'tcx>, variant_index: usize)
- -> PlaceRef<'ll, 'tcx> {
+ pub fn project_downcast<Bx: BuilderMethods<'a, 'tcx, Value = V>>(
+ &self,
+ bx: &Bx,
+ variant_index: VariantIdx
+ ) -> Self {
let mut downcast = *self;
- downcast.layout = self.layout.for_variant(bx.cx, variant_index);
+ downcast.layout = self.layout.for_variant(bx.cx(), variant_index);
// Cast to the appropriate variant struct type.
- let variant_ty = downcast.layout.llvm_type(bx.cx);
- downcast.llval = bx.pointercast(downcast.llval, variant_ty.ptr_to());
+ let variant_ty = bx.cx().backend_type(downcast.layout);
+ downcast.llval = bx.pointercast(downcast.llval, bx.cx().type_ptr_to(variant_ty));
downcast
}
- pub fn storage_live(&self, bx: &Builder<'a, 'll, 'tcx>) {
+ pub fn storage_live<Bx: BuilderMethods<'a, 'tcx, Value = V>>(&self, bx: &Bx) {
bx.lifetime_start(self.llval, self.layout.size);
}
- pub fn storage_dead(&self, bx: &Builder<'a, 'll, 'tcx>) {
+ pub fn storage_dead<Bx: BuilderMethods<'a, 'tcx, Value = V>>(&self, bx: &Bx) {
bx.lifetime_end(self.llval, self.layout.size);
}
}
-impl FunctionCx<'a, 'll, 'tcx> {
- pub fn codegen_place(&mut self,
- bx: &Builder<'a, 'll, 'tcx>,
- place: &mir::Place<'tcx>)
- -> PlaceRef<'ll, 'tcx> {
+impl<'a, 'tcx: 'a, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
+ pub fn codegen_place(
+ &mut self,
+ bx: &Bx,
+ place: &mir::Place<'tcx>
+ ) -> PlaceRef<'tcx, Bx::Value> {
debug!("codegen_place(place={:?})", place);
- let cx = bx.cx;
- let tcx = cx.tcx;
+ let cx = bx.cx();
+ let tcx = cx.tcx();
if let mir::Place::Local(index) = *place {
match self.locals[index] {
return place;
}
LocalRef::UnsizedPlace(place) => {
- return place.load(bx).deref(&cx);
+ return bx.load_operand(place).deref(cx);
}
LocalRef::Operand(..) => {
bug!("using operand local {:?} as place", place);
match bx.tcx().const_eval(param_env.and(cid)) {
Ok(val) => match val.val {
mir::interpret::ConstValue::ByRef(_, alloc, offset) => {
- PlaceRef::from_const_alloc(bx, layout, alloc, offset)
+ bx.cx().from_const_alloc(layout, alloc, offset)
}
_ => bug!("promoteds should have an allocation: {:?}", val),
},
// and compile-time agree on values
// With floats that won't always be true
// so we generate an abort
- let fnname = bx.cx.get_intrinsic(&("llvm.trap"));
+ let fnname = bx.cx().get_intrinsic(&("llvm.trap"));
bx.call(fnname, &[], None);
- let llval = C_undef(layout.llvm_type(bx.cx).ptr_to());
+ let llval = bx.cx().const_undef(
+ bx.cx().type_ptr_to(bx.cx().backend_type(layout))
+ );
PlaceRef::new_sized(llval, layout, layout.align)
}
}
}
mir::Place::Static(box mir::Static { def_id, ty }) => {
let layout = cx.layout_of(self.monomorphize(&ty));
- PlaceRef::new_sized(consts::get_static(cx, def_id), layout, layout.align)
+ PlaceRef::new_sized(cx.get_static(def_id), layout, layout.align)
},
mir::Place::Projection(box mir::Projection {
ref base,
elem: mir::ProjectionElem::Deref
}) => {
// Load the pointer from its location.
- self.codegen_consume(bx, base).deref(bx.cx)
+ self.codegen_consume(bx, base).deref(bx.cx())
}
mir::Place::Projection(ref projection) => {
let cg_base = self.codegen_place(bx, &projection.base);
mir::ProjectionElem::ConstantIndex { offset,
from_end: false,
min_length: _ } => {
- let lloffset = C_usize(bx.cx, offset as u64);
+ let lloffset = bx.cx().const_usize(offset as u64);
cg_base.project_index(bx, lloffset)
}
mir::ProjectionElem::ConstantIndex { offset,
from_end: true,
min_length: _ } => {
- let lloffset = C_usize(bx.cx, offset as u64);
- let lllen = cg_base.len(bx.cx);
+ let lloffset = bx.cx().const_usize(offset as u64);
+ let lllen = cg_base.len(bx.cx());
let llindex = bx.sub(lllen, lloffset);
cg_base.project_index(bx, llindex)
}
mir::ProjectionElem::Subslice { from, to } => {
let mut subslice = cg_base.project_index(bx,
- C_usize(bx.cx, from as u64));
+ bx.cx().const_usize(from as u64));
let projected_ty = PlaceTy::Ty { ty: cg_base.layout.ty }
- .projection_ty(tcx, &projection.elem).to_ty(bx.tcx());
- subslice.layout = bx.cx.layout_of(self.monomorphize(&projected_ty));
+ .projection_ty(tcx, &projection.elem).to_ty(tcx);
+ subslice.layout = bx.cx().layout_of(self.monomorphize(&projected_ty));
if subslice.layout.is_unsized() {
subslice.llextra = Some(bx.sub(cg_base.llextra.unwrap(),
- C_usize(bx.cx, (from as u64) + (to as u64))));
+ bx.cx().const_usize((from as u64) + (to as u64))));
}
// Cast the place pointer type to the new
// array or slice type (*[%_; new_len]).
subslice.llval = bx.pointercast(subslice.llval,
- subslice.layout.llvm_type(bx.cx).ptr_to());
+ bx.cx().type_ptr_to(bx.cx().backend_type(subslice.layout)));
subslice
}
}
pub fn monomorphized_place_ty(&self, place: &mir::Place<'tcx>) -> Ty<'tcx> {
- let tcx = self.cx.tcx;
+ let tcx = self.cx.tcx();
let place_ty = place.ty(self.mir, tcx);
self.monomorphize(&place_ty.to_ty(tcx))
}
projects / rust.git / blobdiff