1 use crate::llvm::{AtomicRmwBinOp, AtomicOrdering, SynchronizationScope};
2 use crate::llvm::{self, False, BasicBlock};
3 use crate::common::Funclet;
4 use crate::context::CodegenCx;
5 use crate::type_::Type;
6 use crate::type_of::LayoutLlvmExt;
7 use crate::value::Value;
8 use rustc_codegen_ssa::common::{IntPredicate, TypeKind, RealPredicate};
9 use rustc_codegen_ssa::MemFlags;
10 use libc::{c_uint, c_char};
11 use rustc::ty::{self, Ty, TyCtxt};
12 use rustc::ty::layout::{self, Align, Size, TyLayout};
13 use rustc::hir::def_id::DefId;
14 use rustc::session::config;
15 use rustc_data_structures::small_c_str::SmallCStr;
16 use rustc_codegen_ssa::traits::*;
17 use rustc_codegen_ssa::base::to_immediate;
18 use rustc_codegen_ssa::mir::operand::{OperandValue, OperandRef};
19 use rustc_codegen_ssa::mir::place::PlaceRef;
20 use rustc_target::spec::{HasTargetSpec, Target};
23 use std::ops::{Deref, Range};
25 use std::iter::TrustedLen;
27 // All Builders must have an llfn associated with them
29 pub struct Builder<'a, 'll, 'tcx> {
30 pub llbuilder: &'ll mut llvm::Builder<'ll>,
31 pub cx: &'a CodegenCx<'ll, 'tcx>,
34 impl Drop for Builder<'a, 'll, 'tcx> {
37 llvm::LLVMDisposeBuilder(&mut *(self.llbuilder as *mut _));
42 // FIXME(eddyb) use a checked constructor when they become `const fn`.
43 const EMPTY_C_STR: &CStr = unsafe {
44 CStr::from_bytes_with_nul_unchecked(b"\0")
47 /// Empty string, to be used where LLVM expects an instruction name, indicating
48 /// that the instruction is to be left unnamed (i.e. numbered, in textual IR).
49 // FIXME(eddyb) pass `&CStr` directly to FFI once it's a thin pointer.
50 const UNNAMED: *const c_char = EMPTY_C_STR.as_ptr();
52 impl BackendTypes for Builder<'_, 'll, 'tcx> {
53 type Value = <CodegenCx<'ll, 'tcx> as BackendTypes>::Value;
54 type Function = <CodegenCx<'ll, 'tcx> as BackendTypes>::Function;
55 type BasicBlock = <CodegenCx<'ll, 'tcx> as BackendTypes>::BasicBlock;
56 type Type = <CodegenCx<'ll, 'tcx> as BackendTypes>::Type;
57 type Funclet = <CodegenCx<'ll, 'tcx> as BackendTypes>::Funclet;
59 type DIScope = <CodegenCx<'ll, 'tcx> as BackendTypes>::DIScope;
62 impl ty::layout::HasDataLayout for Builder<'_, '_, '_> {
63 fn data_layout(&self) -> &ty::layout::TargetDataLayout {
68 impl ty::layout::HasTyCtxt<'tcx> for Builder<'_, '_, 'tcx> {
69 fn tcx(&self) -> TyCtxt<'tcx> {
74 impl ty::layout::HasParamEnv<'tcx> for Builder<'_, '_, 'tcx> {
75 fn param_env(&self) -> ty::ParamEnv<'tcx> {
80 impl HasTargetSpec for Builder<'_, '_, 'tcx> {
81 fn target_spec(&self) -> &Target {
82 &self.cx.target_spec()
86 impl ty::layout::LayoutOf for Builder<'_, '_, 'tcx> {
88 type TyLayout = TyLayout<'tcx>;
90 fn layout_of(&self, ty: Ty<'tcx>) -> Self::TyLayout {
95 impl Deref for Builder<'_, 'll, 'tcx> {
96 type Target = CodegenCx<'ll, 'tcx>;
98 fn deref(&self) -> &Self::Target {
103 impl HasCodegen<'tcx> for Builder<'_, 'll, 'tcx> {
104 type CodegenCx = CodegenCx<'ll, 'tcx>;
107 macro_rules! builder_methods_for_value_instructions {
108 ($($name:ident($($arg:ident),*) => $llvm_capi:ident),+ $(,)?) => {
109 $(fn $name(&mut self, $($arg: &'ll Value),*) -> &'ll Value {
111 llvm::$llvm_capi(self.llbuilder, $($arg,)* UNNAMED)
117 impl BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
119 cx: &'a CodegenCx<'ll, 'tcx>,
123 let mut bx = Builder::with_cx(cx);
125 let name = SmallCStr::new(name);
126 llvm::LLVMAppendBasicBlockInContext(
132 bx.position_at_end(llbb);
136 fn with_cx(cx: &'a CodegenCx<'ll, 'tcx>) -> Self {
137 // Create a fresh builder from the crate context.
138 let llbuilder = unsafe {
139 llvm::LLVMCreateBuilderInContext(cx.llcx)
147 fn build_sibling_block(&self, name: &str) -> Self {
148 Builder::new_block(self.cx, self.llfn(), name)
151 fn llbb(&self) -> &'ll BasicBlock {
153 llvm::LLVMGetInsertBlock(self.llbuilder)
157 fn position_at_end(&mut self, llbb: &'ll BasicBlock) {
159 llvm::LLVMPositionBuilderAtEnd(self.llbuilder, llbb);
163 fn ret_void(&mut self) {
165 llvm::LLVMBuildRetVoid(self.llbuilder);
169 fn ret(&mut self, v: &'ll Value) {
171 llvm::LLVMBuildRet(self.llbuilder, v);
175 fn br(&mut self, dest: &'ll BasicBlock) {
177 llvm::LLVMBuildBr(self.llbuilder, dest);
184 then_llbb: &'ll BasicBlock,
185 else_llbb: &'ll BasicBlock,
188 llvm::LLVMBuildCondBr(self.llbuilder, cond, then_llbb, else_llbb);
195 else_llbb: &'ll BasicBlock,
196 cases: impl ExactSizeIterator<Item = (u128, &'ll BasicBlock)> + TrustedLen,
198 let switch = unsafe {
199 llvm::LLVMBuildSwitch(self.llbuilder, v, else_llbb, cases.len() as c_uint)
201 for (on_val, dest) in cases {
202 let on_val = self.const_uint_big(self.val_ty(v), on_val);
204 llvm::LLVMAddCase(switch, on_val, dest)
213 then: &'ll BasicBlock,
214 catch: &'ll BasicBlock,
215 funclet: Option<&Funclet<'ll>>,
218 debug!("invoke {:?} with args ({:?})",
222 let args = self.check_call("invoke", llfn, args);
223 let bundle = funclet.map(|funclet| funclet.bundle());
224 let bundle = bundle.as_ref().map(|b| &*b.raw);
227 llvm::LLVMRustBuildInvoke(self.llbuilder,
230 args.len() as c_uint,
238 fn unreachable(&mut self) {
240 llvm::LLVMBuildUnreachable(self.llbuilder);
244 builder_methods_for_value_instructions! {
245 add(a, b) => LLVMBuildAdd,
246 fadd(a, b) => LLVMBuildFAdd,
247 sub(a, b) => LLVMBuildSub,
248 fsub(a, b) => LLVMBuildFSub,
249 mul(a, b) => LLVMBuildMul,
250 fmul(a, b) => LLVMBuildFMul,
251 udiv(a, b) => LLVMBuildUDiv,
252 exactudiv(a, b) => LLVMBuildExactUDiv,
253 sdiv(a, b) => LLVMBuildSDiv,
254 exactsdiv(a, b) => LLVMBuildExactSDiv,
255 fdiv(a, b) => LLVMBuildFDiv,
256 urem(a, b) => LLVMBuildURem,
257 srem(a, b) => LLVMBuildSRem,
258 frem(a, b) => LLVMBuildFRem,
259 shl(a, b) => LLVMBuildShl,
260 lshr(a, b) => LLVMBuildLShr,
261 ashr(a, b) => LLVMBuildAShr,
262 and(a, b) => LLVMBuildAnd,
263 or(a, b) => LLVMBuildOr,
264 xor(a, b) => LLVMBuildXor,
265 neg(x) => LLVMBuildNeg,
266 fneg(x) => LLVMBuildFNeg,
267 not(x) => LLVMBuildNot,
268 unchecked_sadd(x, y) => LLVMBuildNSWAdd,
269 unchecked_uadd(x, y) => LLVMBuildNUWAdd,
270 unchecked_ssub(x, y) => LLVMBuildNSWSub,
271 unchecked_usub(x, y) => LLVMBuildNUWSub,
272 unchecked_smul(x, y) => LLVMBuildNSWMul,
273 unchecked_umul(x, y) => LLVMBuildNUWMul,
276 fn fadd_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
278 let instr = llvm::LLVMBuildFAdd(self.llbuilder, lhs, rhs, UNNAMED);
279 llvm::LLVMRustSetHasUnsafeAlgebra(instr);
284 fn fsub_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
286 let instr = llvm::LLVMBuildFSub(self.llbuilder, lhs, rhs, UNNAMED);
287 llvm::LLVMRustSetHasUnsafeAlgebra(instr);
292 fn fmul_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
294 let instr = llvm::LLVMBuildFMul(self.llbuilder, lhs, rhs, UNNAMED);
295 llvm::LLVMRustSetHasUnsafeAlgebra(instr);
300 fn fdiv_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
302 let instr = llvm::LLVMBuildFDiv(self.llbuilder, lhs, rhs, UNNAMED);
303 llvm::LLVMRustSetHasUnsafeAlgebra(instr);
308 fn frem_fast(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
310 let instr = llvm::LLVMBuildFRem(self.llbuilder, lhs, rhs, UNNAMED);
311 llvm::LLVMRustSetHasUnsafeAlgebra(instr);
322 ) -> (Self::Value, Self::Value) {
323 use syntax::ast::IntTy::*;
324 use syntax::ast::UintTy::*;
325 use rustc::ty::{Int, Uint};
327 let new_kind = match ty.kind {
328 Int(Isize) => Int(self.tcx.sess.target.isize_ty),
329 Uint(Usize) => Uint(self.tcx.sess.target.usize_ty),
330 ref t @ Uint(_) | ref t @ Int(_) => t.clone(),
331 _ => panic!("tried to get overflow intrinsic for op applied to non-int type")
334 let name = match oop {
335 OverflowOp::Add => match new_kind {
336 Int(I8) => "llvm.sadd.with.overflow.i8",
337 Int(I16) => "llvm.sadd.with.overflow.i16",
338 Int(I32) => "llvm.sadd.with.overflow.i32",
339 Int(I64) => "llvm.sadd.with.overflow.i64",
340 Int(I128) => "llvm.sadd.with.overflow.i128",
342 Uint(U8) => "llvm.uadd.with.overflow.i8",
343 Uint(U16) => "llvm.uadd.with.overflow.i16",
344 Uint(U32) => "llvm.uadd.with.overflow.i32",
345 Uint(U64) => "llvm.uadd.with.overflow.i64",
346 Uint(U128) => "llvm.uadd.with.overflow.i128",
350 OverflowOp::Sub => match new_kind {
351 Int(I8) => "llvm.ssub.with.overflow.i8",
352 Int(I16) => "llvm.ssub.with.overflow.i16",
353 Int(I32) => "llvm.ssub.with.overflow.i32",
354 Int(I64) => "llvm.ssub.with.overflow.i64",
355 Int(I128) => "llvm.ssub.with.overflow.i128",
357 Uint(U8) => "llvm.usub.with.overflow.i8",
358 Uint(U16) => "llvm.usub.with.overflow.i16",
359 Uint(U32) => "llvm.usub.with.overflow.i32",
360 Uint(U64) => "llvm.usub.with.overflow.i64",
361 Uint(U128) => "llvm.usub.with.overflow.i128",
365 OverflowOp::Mul => match new_kind {
366 Int(I8) => "llvm.smul.with.overflow.i8",
367 Int(I16) => "llvm.smul.with.overflow.i16",
368 Int(I32) => "llvm.smul.with.overflow.i32",
369 Int(I64) => "llvm.smul.with.overflow.i64",
370 Int(I128) => "llvm.smul.with.overflow.i128",
372 Uint(U8) => "llvm.umul.with.overflow.i8",
373 Uint(U16) => "llvm.umul.with.overflow.i16",
374 Uint(U32) => "llvm.umul.with.overflow.i32",
375 Uint(U64) => "llvm.umul.with.overflow.i64",
376 Uint(U128) => "llvm.umul.with.overflow.i128",
382 let intrinsic = self.get_intrinsic(&name);
383 let res = self.call(intrinsic, &[lhs, rhs], None);
385 self.extract_value(res, 0),
386 self.extract_value(res, 1),
390 fn alloca(&mut self, ty: &'ll Type, align: Align) -> &'ll Value {
391 let mut bx = Builder::with_cx(self.cx);
392 bx.position_at_start(unsafe {
393 llvm::LLVMGetFirstBasicBlock(self.llfn())
395 bx.dynamic_alloca(ty, align)
398 fn dynamic_alloca(&mut self, ty: &'ll Type, align: Align) -> &'ll Value {
400 let alloca = llvm::LLVMBuildAlloca(self.llbuilder, ty, UNNAMED);
401 llvm::LLVMSetAlignment(alloca, align.bytes() as c_uint);
406 fn array_alloca(&mut self,
409 align: Align) -> &'ll Value {
411 let alloca = llvm::LLVMBuildArrayAlloca(self.llbuilder, ty, len, UNNAMED);
412 llvm::LLVMSetAlignment(alloca, align.bytes() as c_uint);
417 fn load(&mut self, ptr: &'ll Value, align: Align) -> &'ll Value {
419 let load = llvm::LLVMBuildLoad(self.llbuilder, ptr, UNNAMED);
420 llvm::LLVMSetAlignment(load, align.bytes() as c_uint);
425 fn volatile_load(&mut self, ptr: &'ll Value) -> &'ll Value {
427 let load = llvm::LLVMBuildLoad(self.llbuilder, ptr, UNNAMED);
428 llvm::LLVMSetVolatile(load, llvm::True);
436 order: rustc_codegen_ssa::common::AtomicOrdering,
440 let load = llvm::LLVMRustBuildAtomicLoad(
444 AtomicOrdering::from_generic(order),
446 // LLVM requires the alignment of atomic loads to be at least the size of the type.
447 llvm::LLVMSetAlignment(load, size.bytes() as c_uint);
454 place: PlaceRef<'tcx, &'ll Value>
455 ) -> OperandRef<'tcx, &'ll Value> {
456 debug!("PlaceRef::load: {:?}", place);
458 assert_eq!(place.llextra.is_some(), place.layout.is_unsized());
460 if place.layout.is_zst() {
461 return OperandRef::new_zst(self, place.layout);
464 fn scalar_load_metadata<'a, 'll, 'tcx>(
465 bx: &mut Builder<'a, 'll, 'tcx>,
467 scalar: &layout::Scalar
469 let vr = scalar.valid_range.clone();
472 let range = scalar.valid_range_exclusive(bx);
473 if range.start != range.end {
474 bx.range_metadata(load, range);
477 layout::Pointer if vr.start() < vr.end() && !vr.contains(&0) => {
478 bx.nonnull_metadata(load);
484 let val = if let Some(llextra) = place.llextra {
485 OperandValue::Ref(place.llval, Some(llextra), place.align)
486 } else if place.layout.is_llvm_immediate() {
487 let mut const_llval = None;
489 if let Some(global) = llvm::LLVMIsAGlobalVariable(place.llval) {
490 if llvm::LLVMIsGlobalConstant(global) == llvm::True {
491 const_llval = llvm::LLVMGetInitializer(global);
495 let llval = const_llval.unwrap_or_else(|| {
496 let load = self.load(place.llval, place.align);
497 if let layout::Abi::Scalar(ref scalar) = place.layout.abi {
498 scalar_load_metadata(self, load, scalar);
502 OperandValue::Immediate(to_immediate(self, llval, place.layout))
503 } else if let layout::Abi::ScalarPair(ref a, ref b) = place.layout.abi {
504 let b_offset = a.value.size(self).align_to(b.value.align(self).abi);
506 let mut load = |i, scalar: &layout::Scalar, align| {
507 let llptr = self.struct_gep(place.llval, i as u64);
508 let load = self.load(llptr, align);
509 scalar_load_metadata(self, load, scalar);
510 if scalar.is_bool() {
511 self.trunc(load, self.type_i1())
518 load(0, a, place.align),
519 load(1, b, place.align.restrict_for_offset(b_offset)),
522 OperandValue::Ref(place.llval, None, place.align)
525 OperandRef { val, layout: place.layout }
528 fn write_operand_repeatedly(
530 cg_elem: OperandRef<'tcx, &'ll Value>,
532 dest: PlaceRef<'tcx, &'ll Value>,
534 let zero = self.const_usize(0);
535 let count = self.const_usize(count);
536 let start = dest.project_index(&mut self, zero).llval;
537 let end = dest.project_index(&mut self, count).llval;
539 let mut header_bx = self.build_sibling_block("repeat_loop_header");
540 let mut body_bx = self.build_sibling_block("repeat_loop_body");
541 let next_bx = self.build_sibling_block("repeat_loop_next");
543 self.br(header_bx.llbb());
544 let current = header_bx.phi(self.val_ty(start), &[start], &[self.llbb()]);
546 let keep_going = header_bx.icmp(IntPredicate::IntNE, current, end);
547 header_bx.cond_br(keep_going, body_bx.llbb(), next_bx.llbb());
549 let align = dest.align.restrict_for_offset(dest.layout.field(self.cx(), 0).size);
550 cg_elem.val.store(&mut body_bx,
551 PlaceRef::new_sized_aligned(current, cg_elem.layout, align));
553 let next = body_bx.inbounds_gep(current, &[self.const_usize(1)]);
554 body_bx.br(header_bx.llbb());
555 header_bx.add_incoming_to_phi(current, next, body_bx.llbb());
560 fn range_metadata(&mut self, load: &'ll Value, range: Range<u128>) {
561 if self.sess().target.target.arch == "amdgpu" {
562 // amdgpu/LLVM does something weird and thinks a i64 value is
563 // split into a v2i32, halving the bitwidth LLVM expects,
564 // tripping an assertion. So, for now, just disable this
570 let llty = self.cx.val_ty(load);
572 self.cx.const_uint_big(llty, range.start),
573 self.cx.const_uint_big(llty, range.end)
576 llvm::LLVMSetMetadata(load, llvm::MD_range as c_uint,
577 llvm::LLVMMDNodeInContext(self.cx.llcx,
583 fn nonnull_metadata(&mut self, load: &'ll Value) {
585 llvm::LLVMSetMetadata(load, llvm::MD_nonnull as c_uint,
586 llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0));
590 fn store(&mut self, val: &'ll Value, ptr: &'ll Value, align: Align) -> &'ll Value {
591 self.store_with_flags(val, ptr, align, MemFlags::empty())
601 debug!("Store {:?} -> {:?} ({:?})", val, ptr, flags);
602 let ptr = self.check_store(val, ptr);
604 let store = llvm::LLVMBuildStore(self.llbuilder, val, ptr);
605 let align = if flags.contains(MemFlags::UNALIGNED) {
608 align.bytes() as c_uint
610 llvm::LLVMSetAlignment(store, align);
611 if flags.contains(MemFlags::VOLATILE) {
612 llvm::LLVMSetVolatile(store, llvm::True);
614 if flags.contains(MemFlags::NONTEMPORAL) {
615 // According to LLVM [1] building a nontemporal store must
616 // *always* point to a metadata value of the integer 1.
618 // [1]: http://llvm.org/docs/LangRef.html#store-instruction
619 let one = self.cx.const_i32(1);
620 let node = llvm::LLVMMDNodeInContext(self.cx.llcx, &one, 1);
621 llvm::LLVMSetMetadata(store, llvm::MD_nontemporal as c_uint, node);
627 fn atomic_store(&mut self, val: &'ll Value, ptr: &'ll Value,
628 order: rustc_codegen_ssa::common::AtomicOrdering, size: Size) {
629 debug!("Store {:?} -> {:?}", val, ptr);
630 let ptr = self.check_store(val, ptr);
632 let store = llvm::LLVMRustBuildAtomicStore(
636 AtomicOrdering::from_generic(order),
638 // LLVM requires the alignment of atomic stores to be at least the size of the type.
639 llvm::LLVMSetAlignment(store, size.bytes() as c_uint);
643 fn gep(&mut self, ptr: &'ll Value, indices: &[&'ll Value]) -> &'ll Value {
645 llvm::LLVMBuildGEP(self.llbuilder, ptr, indices.as_ptr(),
646 indices.len() as c_uint, UNNAMED)
650 fn inbounds_gep(&mut self, ptr: &'ll Value, indices: &[&'ll Value]) -> &'ll Value {
652 llvm::LLVMBuildInBoundsGEP(
653 self.llbuilder, ptr, indices.as_ptr(), indices.len() as c_uint, UNNAMED)
657 fn struct_gep(&mut self, ptr: &'ll Value, idx: u64) -> &'ll Value {
658 assert_eq!(idx as c_uint as u64, idx);
660 llvm::LLVMBuildStructGEP(self.llbuilder, ptr, idx as c_uint, UNNAMED)
665 fn trunc(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
667 llvm::LLVMBuildTrunc(self.llbuilder, val, dest_ty, UNNAMED)
671 fn sext(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
673 llvm::LLVMBuildSExt(self.llbuilder, val, dest_ty, UNNAMED)
677 fn fptoui(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
679 llvm::LLVMBuildFPToUI(self.llbuilder, val, dest_ty, UNNAMED)
683 fn fptosi(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
685 llvm::LLVMBuildFPToSI(self.llbuilder, val, dest_ty,UNNAMED)
689 fn uitofp(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
691 llvm::LLVMBuildUIToFP(self.llbuilder, val, dest_ty, UNNAMED)
695 fn sitofp(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
697 llvm::LLVMBuildSIToFP(self.llbuilder, val, dest_ty, UNNAMED)
701 fn fptrunc(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
703 llvm::LLVMBuildFPTrunc(self.llbuilder, val, dest_ty, UNNAMED)
707 fn fpext(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
709 llvm::LLVMBuildFPExt(self.llbuilder, val, dest_ty, UNNAMED)
713 fn ptrtoint(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
715 llvm::LLVMBuildPtrToInt(self.llbuilder, val, dest_ty, UNNAMED)
719 fn inttoptr(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
721 llvm::LLVMBuildIntToPtr(self.llbuilder, val, dest_ty, UNNAMED)
725 fn bitcast(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
727 llvm::LLVMBuildBitCast(self.llbuilder, val, dest_ty, UNNAMED)
732 fn intcast(&mut self, val: &'ll Value, dest_ty: &'ll Type, is_signed: bool) -> &'ll Value {
734 llvm::LLVMRustBuildIntCast(self.llbuilder, val, dest_ty, is_signed)
738 fn pointercast(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
740 llvm::LLVMBuildPointerCast(self.llbuilder, val, dest_ty, UNNAMED)
745 fn icmp(&mut self, op: IntPredicate, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
746 let op = llvm::IntPredicate::from_generic(op);
748 llvm::LLVMBuildICmp(self.llbuilder, op as c_uint, lhs, rhs, UNNAMED)
752 fn fcmp(&mut self, op: RealPredicate, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
754 llvm::LLVMBuildFCmp(self.llbuilder, op as c_uint, lhs, rhs, UNNAMED)
758 /* Miscellaneous instructions */
759 fn memcpy(&mut self, dst: &'ll Value, dst_align: Align,
760 src: &'ll Value, src_align: Align,
761 size: &'ll Value, flags: MemFlags) {
762 if flags.contains(MemFlags::NONTEMPORAL) {
763 // HACK(nox): This is inefficient but there is no nontemporal memcpy.
764 let val = self.load(src, src_align);
765 let ptr = self.pointercast(dst, self.type_ptr_to(self.val_ty(val)));
766 self.store_with_flags(val, ptr, dst_align, flags);
769 let size = self.intcast(size, self.type_isize(), false);
770 let is_volatile = flags.contains(MemFlags::VOLATILE);
771 let dst = self.pointercast(dst, self.type_i8p());
772 let src = self.pointercast(src, self.type_i8p());
774 llvm::LLVMRustBuildMemCpy(self.llbuilder, dst, dst_align.bytes() as c_uint,
775 src, src_align.bytes() as c_uint, size, is_volatile);
779 fn memmove(&mut self, dst: &'ll Value, dst_align: Align,
780 src: &'ll Value, src_align: Align,
781 size: &'ll Value, flags: MemFlags) {
782 if flags.contains(MemFlags::NONTEMPORAL) {
783 // HACK(nox): This is inefficient but there is no nontemporal memmove.
784 let val = self.load(src, src_align);
785 let ptr = self.pointercast(dst, self.type_ptr_to(self.val_ty(val)));
786 self.store_with_flags(val, ptr, dst_align, flags);
789 let size = self.intcast(size, self.type_isize(), false);
790 let is_volatile = flags.contains(MemFlags::VOLATILE);
791 let dst = self.pointercast(dst, self.type_i8p());
792 let src = self.pointercast(src, self.type_i8p());
794 llvm::LLVMRustBuildMemMove(self.llbuilder, dst, dst_align.bytes() as c_uint,
795 src, src_align.bytes() as c_uint, size, is_volatile);
802 fill_byte: &'ll Value,
807 let ptr_width = &self.sess().target.target.target_pointer_width;
808 let intrinsic_key = format!("llvm.memset.p0i8.i{}", ptr_width);
809 let llintrinsicfn = self.get_intrinsic(&intrinsic_key);
810 let ptr = self.pointercast(ptr, self.type_i8p());
811 let align = self.const_u32(align.bytes() as u32);
812 let volatile = self.const_bool(flags.contains(MemFlags::VOLATILE));
813 self.call(llintrinsicfn, &[ptr, fill_byte, size, align, volatile], None);
817 &mut self, cond: &'ll Value,
818 then_val: &'ll Value,
819 else_val: &'ll Value,
822 llvm::LLVMBuildSelect(self.llbuilder, cond, then_val, else_val, UNNAMED)
827 fn va_arg(&mut self, list: &'ll Value, ty: &'ll Type) -> &'ll Value {
829 llvm::LLVMBuildVAArg(self.llbuilder, list, ty, UNNAMED)
833 fn extract_element(&mut self, vec: &'ll Value, idx: &'ll Value) -> &'ll Value {
835 llvm::LLVMBuildExtractElement(self.llbuilder, vec, idx, UNNAMED)
839 fn vector_splat(&mut self, num_elts: usize, elt: &'ll Value) -> &'ll Value {
841 let elt_ty = self.cx.val_ty(elt);
842 let undef = llvm::LLVMGetUndef(self.type_vector(elt_ty, num_elts as u64));
843 let vec = self.insert_element(undef, elt, self.cx.const_i32(0));
844 let vec_i32_ty = self.type_vector(self.type_i32(), num_elts as u64);
845 self.shuffle_vector(vec, undef, self.const_null(vec_i32_ty))
849 fn extract_value(&mut self, agg_val: &'ll Value, idx: u64) -> &'ll Value {
850 assert_eq!(idx as c_uint as u64, idx);
852 llvm::LLVMBuildExtractValue(self.llbuilder, agg_val, idx as c_uint, UNNAMED)
856 fn insert_value(&mut self, agg_val: &'ll Value, elt: &'ll Value,
857 idx: u64) -> &'ll Value {
858 assert_eq!(idx as c_uint as u64, idx);
860 llvm::LLVMBuildInsertValue(self.llbuilder, agg_val, elt, idx as c_uint,
865 fn landing_pad(&mut self, ty: &'ll Type, pers_fn: &'ll Value,
866 num_clauses: usize) -> &'ll Value {
868 llvm::LLVMBuildLandingPad(self.llbuilder, ty, pers_fn,
869 num_clauses as c_uint, UNNAMED)
873 fn set_cleanup(&mut self, landing_pad: &'ll Value) {
875 llvm::LLVMSetCleanup(landing_pad, llvm::True);
879 fn resume(&mut self, exn: &'ll Value) -> &'ll Value {
881 llvm::LLVMBuildResume(self.llbuilder, exn)
885 fn cleanup_pad(&mut self,
886 parent: Option<&'ll Value>,
887 args: &[&'ll Value]) -> Funclet<'ll> {
888 let name = const_cstr!("cleanuppad");
890 llvm::LLVMRustBuildCleanupPad(self.llbuilder,
892 args.len() as c_uint,
896 Funclet::new(ret.expect("LLVM does not have support for cleanuppad"))
900 &mut self, funclet: &Funclet<'ll>,
901 unwind: Option<&'ll BasicBlock>,
904 llvm::LLVMRustBuildCleanupRet(self.llbuilder, funclet.cleanuppad(), unwind)
906 ret.expect("LLVM does not have support for cleanupret")
909 fn catch_pad(&mut self,
911 args: &[&'ll Value]) -> Funclet<'ll> {
912 let name = const_cstr!("catchpad");
914 llvm::LLVMRustBuildCatchPad(self.llbuilder, parent,
915 args.len() as c_uint, args.as_ptr(),
918 Funclet::new(ret.expect("LLVM does not have support for catchpad"))
923 parent: Option<&'ll Value>,
924 unwind: Option<&'ll BasicBlock>,
927 let name = const_cstr!("catchswitch");
929 llvm::LLVMRustBuildCatchSwitch(self.llbuilder, parent, unwind,
930 num_handlers as c_uint,
933 ret.expect("LLVM does not have support for catchswitch")
936 fn add_handler(&mut self, catch_switch: &'ll Value, handler: &'ll BasicBlock) {
938 llvm::LLVMRustAddHandler(catch_switch, handler);
942 fn set_personality_fn(&mut self, personality: &'ll Value) {
944 llvm::LLVMSetPersonalityFn(self.llfn(), personality);
954 order: rustc_codegen_ssa::common::AtomicOrdering,
955 failure_order: rustc_codegen_ssa::common::AtomicOrdering,
958 let weak = if weak { llvm::True } else { llvm::False };
960 llvm::LLVMRustBuildAtomicCmpXchg(
965 AtomicOrdering::from_generic(order),
966 AtomicOrdering::from_generic(failure_order),
973 op: rustc_codegen_ssa::common::AtomicRmwBinOp,
976 order: rustc_codegen_ssa::common::AtomicOrdering,
979 llvm::LLVMBuildAtomicRMW(
981 AtomicRmwBinOp::from_generic(op),
984 AtomicOrdering::from_generic(order),
991 order: rustc_codegen_ssa::common::AtomicOrdering,
992 scope: rustc_codegen_ssa::common::SynchronizationScope
995 llvm::LLVMRustBuildAtomicFence(
997 AtomicOrdering::from_generic(order),
998 SynchronizationScope::from_generic(scope)
1003 fn set_invariant_load(&mut self, load: &'ll Value) {
1005 llvm::LLVMSetMetadata(load, llvm::MD_invariant_load as c_uint,
1006 llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0));
1010 fn lifetime_start(&mut self, ptr: &'ll Value, size: Size) {
1011 self.call_lifetime_intrinsic("llvm.lifetime.start", ptr, size);
1014 fn lifetime_end(&mut self, ptr: &'ll Value, size: Size) {
1015 self.call_lifetime_intrinsic("llvm.lifetime.end", ptr, size);
1021 args: &[&'ll Value],
1022 funclet: Option<&Funclet<'ll>>,
1025 debug!("call {:?} with args ({:?})",
1029 let args = self.check_call("call", llfn, args);
1030 let bundle = funclet.map(|funclet| funclet.bundle());
1031 let bundle = bundle.as_ref().map(|b| &*b.raw);
1034 llvm::LLVMRustBuildCall(
1037 args.as_ptr() as *const &llvm::Value,
1038 args.len() as c_uint,
1044 fn zext(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
1046 llvm::LLVMBuildZExt(self.llbuilder, val, dest_ty, UNNAMED)
1051 fn cx(&self) -> &CodegenCx<'ll, 'tcx> {
1055 unsafe fn delete_basic_block(&mut self, bb: &'ll BasicBlock) {
1056 llvm::LLVMDeleteBasicBlock(bb);
1059 fn do_not_inline(&mut self, llret: &'ll Value) {
1060 llvm::Attribute::NoInline.apply_callsite(llvm::AttributePlace::Function, llret);
1064 impl StaticBuilderMethods for Builder<'a, 'll, 'tcx> {
1065 fn get_static(&mut self, def_id: DefId) -> &'ll Value {
1066 // Forward to the `get_static` method of `CodegenCx`
1067 self.cx().get_static(def_id)
1071 impl Builder<'a, 'll, 'tcx> {
1072 pub fn llfn(&self) -> &'ll Value {
1074 llvm::LLVMGetBasicBlockParent(self.llbb())
1078 fn position_at_start(&mut self, llbb: &'ll BasicBlock) {
1080 llvm::LLVMRustPositionBuilderAtStart(self.llbuilder, llbb);
1084 pub fn minnum(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
1085 unsafe { llvm::LLVMRustBuildMinNum(self.llbuilder, lhs, rhs) }
1088 pub fn maxnum(&mut self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value {
1089 unsafe { llvm::LLVMRustBuildMaxNum(self.llbuilder, lhs, rhs) }
1092 pub fn insert_element(
1093 &mut self, vec: &'ll Value,
1098 llvm::LLVMBuildInsertElement(self.llbuilder, vec, elt, idx, UNNAMED)
1102 pub fn shuffle_vector(
1109 llvm::LLVMBuildShuffleVector(self.llbuilder, v1, v2, mask, UNNAMED)
1113 pub fn vector_reduce_fadd(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
1114 unsafe { llvm::LLVMRustBuildVectorReduceFAdd(self.llbuilder, acc, src) }
1116 pub fn vector_reduce_fmul(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
1117 unsafe { llvm::LLVMRustBuildVectorReduceFMul(self.llbuilder, acc, src) }
1119 pub fn vector_reduce_fadd_fast(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
1121 let instr = llvm::LLVMRustBuildVectorReduceFAdd(self.llbuilder, acc, src);
1122 llvm::LLVMRustSetHasUnsafeAlgebra(instr);
1126 pub fn vector_reduce_fmul_fast(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
1128 let instr = llvm::LLVMRustBuildVectorReduceFMul(self.llbuilder, acc, src);
1129 llvm::LLVMRustSetHasUnsafeAlgebra(instr);
1133 pub fn vector_reduce_add(&mut self, src: &'ll Value) -> &'ll Value {
1134 unsafe { llvm::LLVMRustBuildVectorReduceAdd(self.llbuilder, src) }
1136 pub fn vector_reduce_mul(&mut self, src: &'ll Value) -> &'ll Value {
1137 unsafe { llvm::LLVMRustBuildVectorReduceMul(self.llbuilder, src) }
1139 pub fn vector_reduce_and(&mut self, src: &'ll Value) -> &'ll Value {
1140 unsafe { llvm::LLVMRustBuildVectorReduceAnd(self.llbuilder, src) }
1142 pub fn vector_reduce_or(&mut self, src: &'ll Value) -> &'ll Value {
1143 unsafe { llvm::LLVMRustBuildVectorReduceOr(self.llbuilder, src) }
1145 pub fn vector_reduce_xor(&mut self, src: &'ll Value) -> &'ll Value {
1146 unsafe { llvm::LLVMRustBuildVectorReduceXor(self.llbuilder, src) }
1148 pub fn vector_reduce_fmin(&mut self, src: &'ll Value) -> &'ll Value {
1149 unsafe { llvm::LLVMRustBuildVectorReduceFMin(self.llbuilder, src, /*NoNaNs:*/ false) }
1151 pub fn vector_reduce_fmax(&mut self, src: &'ll Value) -> &'ll Value {
1152 unsafe { llvm::LLVMRustBuildVectorReduceFMax(self.llbuilder, src, /*NoNaNs:*/ false) }
1154 pub fn vector_reduce_fmin_fast(&mut self, src: &'ll Value) -> &'ll Value {
1156 let instr = llvm::LLVMRustBuildVectorReduceFMin(self.llbuilder, src, /*NoNaNs:*/ true);
1157 llvm::LLVMRustSetHasUnsafeAlgebra(instr);
1161 pub fn vector_reduce_fmax_fast(&mut self, src: &'ll Value) -> &'ll Value {
1163 let instr = llvm::LLVMRustBuildVectorReduceFMax(self.llbuilder, src, /*NoNaNs:*/ true);
1164 llvm::LLVMRustSetHasUnsafeAlgebra(instr);
1168 pub fn vector_reduce_min(&mut self, src: &'ll Value, is_signed: bool) -> &'ll Value {
1169 unsafe { llvm::LLVMRustBuildVectorReduceMin(self.llbuilder, src, is_signed) }
1171 pub fn vector_reduce_max(&mut self, src: &'ll Value, is_signed: bool) -> &'ll Value {
1172 unsafe { llvm::LLVMRustBuildVectorReduceMax(self.llbuilder, src, is_signed) }
1175 pub fn add_clause(&mut self, landing_pad: &'ll Value, clause: &'ll Value) {
1177 llvm::LLVMAddClause(landing_pad, clause);
1181 pub fn catch_ret(&mut self, funclet: &Funclet<'ll>, unwind: &'ll BasicBlock) -> &'ll Value {
1183 llvm::LLVMRustBuildCatchRet(self.llbuilder, funclet.cleanuppad(), unwind)
1185 ret.expect("LLVM does not have support for catchret")
1188 fn check_store(&mut self, val: &'ll Value, ptr: &'ll Value) -> &'ll Value {
1189 let dest_ptr_ty = self.cx.val_ty(ptr);
1190 let stored_ty = self.cx.val_ty(val);
1191 let stored_ptr_ty = self.cx.type_ptr_to(stored_ty);
1193 assert_eq!(self.cx.type_kind(dest_ptr_ty), TypeKind::Pointer);
1195 if dest_ptr_ty == stored_ptr_ty {
1198 debug!("type mismatch in store. \
1199 Expected {:?}, got {:?}; inserting bitcast",
1200 dest_ptr_ty, stored_ptr_ty);
1201 self.bitcast(ptr, stored_ptr_ty)
1205 fn check_call<'b>(&mut self,
1208 args: &'b [&'ll Value]) -> Cow<'b, [&'ll Value]> {
1209 let mut fn_ty = self.cx.val_ty(llfn);
1210 // Strip off pointers
1211 while self.cx.type_kind(fn_ty) == TypeKind::Pointer {
1212 fn_ty = self.cx.element_type(fn_ty);
1215 assert!(self.cx.type_kind(fn_ty) == TypeKind::Function,
1216 "builder::{} not passed a function, but {:?}", typ, fn_ty);
1218 let param_tys = self.cx.func_params_types(fn_ty);
1220 let all_args_match = param_tys.iter()
1221 .zip(args.iter().map(|&v| self.val_ty(v)))
1222 .all(|(expected_ty, actual_ty)| *expected_ty == actual_ty);
1225 return Cow::Borrowed(args);
1228 let casted_args: Vec<_> = param_tys.into_iter()
1231 .map(|(i, (expected_ty, &actual_val))| {
1232 let actual_ty = self.val_ty(actual_val);
1233 if expected_ty != actual_ty {
1234 debug!("type mismatch in function call of {:?}. \
1235 Expected {:?} for param {}, got {:?}; injecting bitcast",
1236 llfn, expected_ty, i, actual_ty);
1237 self.bitcast(actual_val, expected_ty)
1244 Cow::Owned(casted_args)
1247 pub fn va_arg(&mut self, list: &'ll Value, ty: &'ll Type) -> &'ll Value {
1249 llvm::LLVMBuildVAArg(self.llbuilder, list, ty, UNNAMED)
1253 fn call_lifetime_intrinsic(&mut self, intrinsic: &str, ptr: &'ll Value, size: Size) {
1254 if self.cx.sess().opts.optimize == config::OptLevel::No {
1258 let size = size.bytes();
1263 let lifetime_intrinsic = self.cx.get_intrinsic(intrinsic);
1265 let ptr = self.pointercast(ptr, self.cx.type_i8p());
1266 self.call(lifetime_intrinsic, &[self.cx.const_u64(size), ptr], None);
1269 fn phi(&mut self, ty: &'ll Type, vals: &[&'ll Value], bbs: &[&'ll BasicBlock]) -> &'ll Value {
1270 assert_eq!(vals.len(), bbs.len());
1272 llvm::LLVMBuildPhi(self.llbuilder, ty, UNNAMED)
1275 llvm::LLVMAddIncoming(phi, vals.as_ptr(),
1277 vals.len() as c_uint);
1282 fn add_incoming_to_phi(&mut self, phi: &'ll Value, val: &'ll Value, bb: &'ll BasicBlock) {
1284 llvm::LLVMAddIncoming(phi, &val, &bb, 1 as c_uint);