llvm-mirror/include/llvm/Intrinsics.td

//===- Intrinsics.td - Defines all LLVM intrinsics ---------*- tablegen -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines properties of all LLVM intrinsics.
//
//===----------------------------------------------------------------------===//

include "llvm/CodeGen/ValueTypes.td"

//===----------------------------------------------------------------------===//
//  Properties we keep track of for intrinsics.
//===----------------------------------------------------------------------===//

class IntrinsicProperty;

// Intr*Mem - Memory properties.  An intrinsic is allowed to have at most one of
// these properties set.  They are listed from the most aggressive (best to use
// if correct) to the least aggressive.  If no property is set, the worst case
// is assumed (it may read and write any memory it can get access to and it may
// have other side effects).

// IntrNoMem - The intrinsic does not access memory or have any other side
// effects.  It may be CSE'd deleted if dead, etc.
def IntrNoMem : IntrinsicProperty;

// IntrReadArgMem - This intrinsic reads only from memory that one of its
// pointer-typed arguments points to, but may read an unspecified amount.
def IntrReadArgMem : IntrinsicProperty;

// IntrReadMem - This intrinsic reads from unspecified memory, so it cannot be
// moved across stores.  However, it can be reordered otherwise and can be
// deleted if dead.
def IntrReadMem : IntrinsicProperty;

// IntrReadWriteArgMem - This intrinsic reads and writes only from memory that
// one of its arguments points to, but may access an unspecified amount.  The
// reads and writes may be volatile, but except for this it has no other side
// effects.
def IntrReadWriteArgMem : IntrinsicProperty;

// Commutative - This intrinsic is commutative: X op Y == Y op X.
def Commutative : IntrinsicProperty;

// Throws - This intrinsic can throw.
def Throws : IntrinsicProperty;

// NoCapture - The specified argument pointer is not captured by the intrinsic.
class NoCapture<int argNo> : IntrinsicProperty {
  int ArgNo = argNo;
}

//===----------------------------------------------------------------------===//
// Types used by intrinsics.
//===----------------------------------------------------------------------===//

class LLVMType<ValueType vt> {
  ValueType VT = vt;
}

class LLVMPointerType<LLVMType elty>
  : LLVMType<iPTR>{
  LLVMType ElTy = elty;
}

class LLVMAnyPointerType<LLVMType elty>
  : LLVMType<iPTRAny>{
  LLVMType ElTy = elty;
}

// Match the type of another intrinsic parameter.  Number is an index into the
// list of overloaded types for the intrinsic, excluding all the fixed types.
// The Number value must refer to a previously listed type.  For example:
//   Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_anyfloat_ty, LLVMMatchType<0>]>
// has two overloaded types, the 2nd and 3rd arguments.  LLVMMatchType<0>
// refers to the first overloaded type, which is the 2nd argument.
class LLVMMatchType<int num>
  : LLVMType<OtherVT>{
  int Number = num;
}

// Match the type of another intrinsic parameter that is expected to be
// an integral vector type, but change the element size to be twice as wide
// or half as wide as the other type.  This is only useful when the intrinsic
// is overloaded, so the matched type should be declared as iAny.
class LLVMExtendedElementVectorType<int num> : LLVMMatchType<num>;
class LLVMTruncatedElementVectorType<int num> : LLVMMatchType<num>;

def llvm_void_ty       : LLVMType<isVoid>;
def llvm_anyint_ty     : LLVMType<iAny>;
def llvm_anyfloat_ty   : LLVMType<fAny>;
def llvm_anyvector_ty  : LLVMType<vAny>;
def llvm_i1_ty         : LLVMType<i1>;
def llvm_i8_ty         : LLVMType<i8>;
def llvm_i16_ty        : LLVMType<i16>;
def llvm_i32_ty        : LLVMType<i32>;
def llvm_i64_ty        : LLVMType<i64>;
def llvm_float_ty      : LLVMType<f32>;
def llvm_double_ty     : LLVMType<f64>;
def llvm_f80_ty        : LLVMType<f80>;
def llvm_f128_ty       : LLVMType<f128>;
def llvm_ppcf128_ty    : LLVMType<ppcf128>;
def llvm_ptr_ty        : LLVMPointerType<llvm_i8_ty>;             // i8*
def llvm_ptrptr_ty     : LLVMPointerType<llvm_ptr_ty>;            // i8**
def llvm_anyptr_ty     : LLVMAnyPointerType<llvm_i8_ty>;          // (space)i8*
def llvm_empty_ty      : LLVMType<OtherVT>;                       // { }
def llvm_descriptor_ty : LLVMPointerType<llvm_empty_ty>;          // { }*
def llvm_metadata_ty   : LLVMType<MetadataVT>;                    // !{...}

def llvm_x86mmx_ty     : LLVMType<x86mmx>;
def llvm_ptrx86mmx_ty  : LLVMPointerType<llvm_x86mmx_ty>;         // <1 x i64>*

def llvm_v2i8_ty       : LLVMType<v2i8>;     //  2 x i8
def llvm_v4i8_ty       : LLVMType<v4i8>;     //  4 x i8
def llvm_v8i8_ty       : LLVMType<v8i8>;     //  8 x i8
def llvm_v16i8_ty      : LLVMType<v16i8>;    // 16 x i8
def llvm_v32i8_ty      : LLVMType<v32i8>;    // 32 x i8
def llvm_v2i16_ty      : LLVMType<v2i16>;    //  2 x i16
def llvm_v4i16_ty      : LLVMType<v4i16>;    //  4 x i16
def llvm_v8i16_ty      : LLVMType<v8i16>;    //  8 x i16
def llvm_v16i16_ty     : LLVMType<v16i16>;   // 16 x i16
def llvm_v2i32_ty      : LLVMType<v2i32>;    //  2 x i32
def llvm_v4i32_ty      : LLVMType<v4i32>;    //  4 x i32
def llvm_v8i32_ty      : LLVMType<v8i32>;    //  8 x i32
def llvm_v1i64_ty      : LLVMType<v1i64>;    //  1 x i64
def llvm_v2i64_ty      : LLVMType<v2i64>;    //  2 x i64
def llvm_v4i64_ty      : LLVMType<v4i64>;    //  4 x i64

def llvm_v2f32_ty      : LLVMType<v2f32>;    //  2 x float
def llvm_v4f32_ty      : LLVMType<v4f32>;    //  4 x float
def llvm_v8f32_ty      : LLVMType<v8f32>;    //  8 x float
def llvm_v2f64_ty      : LLVMType<v2f64>;    //  2 x double
def llvm_v4f64_ty      : LLVMType<v4f64>;    //  4 x double

def llvm_vararg_ty     : LLVMType<isVoid>;   // this means vararg here


//===----------------------------------------------------------------------===//
// Intrinsic Definitions.
//===----------------------------------------------------------------------===//

// Intrinsic class - This is used to define one LLVM intrinsic.  The name of the
// intrinsic definition should start with "int_", then match the LLVM intrinsic
// name with the "llvm." prefix removed, and all "."s turned into "_"s.  For
// example, llvm.bswap.i16 -> int_bswap_i16.
//
//  * RetTypes is a list containing the return types expected for the
//    intrinsic.
//  * ParamTypes is a list containing the parameter types expected for the
//    intrinsic.
//  * Properties can be set to describe the behavior of the intrinsic.
//
class Intrinsic<list<LLVMType> ret_types,
                list<LLVMType> param_types = [],
                list<IntrinsicProperty> properties = [],
                string name = ""> {
  string LLVMName = name;
  string TargetPrefix = "";   // Set to a prefix for target-specific intrinsics.
  list<LLVMType> RetTypes = ret_types;
  list<LLVMType> ParamTypes = param_types;
  list<IntrinsicProperty> Properties = properties;

  bit isTarget = 0;
}

/// GCCBuiltin - If this intrinsic exactly corresponds to a GCC builtin, this
/// specifies the name of the builtin.  This provides automatic CBE and CFE
/// support.
class GCCBuiltin<string name> {
  string GCCBuiltinName = name;
}


//===--------------- Variable Argument Handling Intrinsics ----------------===//
//

def int_vastart : Intrinsic<[], [llvm_ptr_ty], [], "llvm.va_start">;
def int_vacopy  : Intrinsic<[], [llvm_ptr_ty, llvm_ptr_ty], [],
                            "llvm.va_copy">;
def int_vaend   : Intrinsic<[], [llvm_ptr_ty], [], "llvm.va_end">;

//===------------------- Garbage Collection Intrinsics --------------------===//
//
def int_gcroot  : Intrinsic<[],
                            [llvm_ptrptr_ty, llvm_ptr_ty]>;
def int_gcread  : Intrinsic<[llvm_ptr_ty],
                            [llvm_ptr_ty, llvm_ptrptr_ty],
                            [IntrReadArgMem]>;
def int_gcwrite : Intrinsic<[],
                            [llvm_ptr_ty, llvm_ptr_ty, llvm_ptrptr_ty],
                            [IntrReadWriteArgMem, NoCapture<1>, NoCapture<2>]>;

//===--------------------- Code Generator Intrinsics ----------------------===//
//
def int_returnaddress : Intrinsic<[llvm_ptr_ty], [llvm_i32_ty], [IntrNoMem]>;
def int_frameaddress  : Intrinsic<[llvm_ptr_ty], [llvm_i32_ty], [IntrNoMem]>;

// Note: we treat stacksave/stackrestore as writemem because we don't otherwise
// model their dependencies on allocas.
def int_stacksave     : Intrinsic<[llvm_ptr_ty]>,
                        GCCBuiltin<"__builtin_stack_save">;
def int_stackrestore  : Intrinsic<[], [llvm_ptr_ty]>,
                        GCCBuiltin<"__builtin_stack_restore">;

// IntrReadWriteArgMem is more pessimistic than strictly necessary for prefetch,
// however it does conveniently prevent the prefetch from being reordered
// with respect to nearby accesses to the same memory.
def int_prefetch      : Intrinsic<[],
                                  [llvm_ptr_ty, llvm_i32_ty, llvm_i32_ty,
                                   llvm_i32_ty],
                                  [IntrReadWriteArgMem, NoCapture<0>]>;
def int_pcmarker      : Intrinsic<[], [llvm_i32_ty]>;

def int_readcyclecounter : Intrinsic<[llvm_i64_ty]>;

// Stack Protector Intrinsic - The stackprotector intrinsic writes the stack
// guard to the correct place on the stack frame.
def int_stackprotector : Intrinsic<[], [llvm_ptr_ty, llvm_ptrptr_ty], []>;

//===------------------- Standard C Library Intrinsics --------------------===//
//

def int_memcpy  : Intrinsic<[],
                             [llvm_anyptr_ty, llvm_anyptr_ty, llvm_anyint_ty,
                              llvm_i32_ty, llvm_i1_ty],
                            [IntrReadWriteArgMem, NoCapture<0>, NoCapture<1>]>;
def int_memmove : Intrinsic<[],
                            [llvm_anyptr_ty, llvm_anyptr_ty, llvm_anyint_ty,
                             llvm_i32_ty, llvm_i1_ty],
                            [IntrReadWriteArgMem, NoCapture<0>, NoCapture<1>]>;
def int_memset  : Intrinsic<[],
                            [llvm_anyptr_ty, llvm_i8_ty, llvm_anyint_ty,
                             llvm_i32_ty, llvm_i1_ty],
                            [IntrReadWriteArgMem, NoCapture<0>]>;

// These functions do not actually read memory, but they are sensitive to the
// rounding mode.  This needs to be modelled separately; in the meantime
// declaring them as reading memory is conservatively correct.
let Properties = [IntrReadMem] in {
  def int_sqrt : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
  def int_powi : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>, llvm_i32_ty]>;
  def int_sin  : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
  def int_cos  : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
  def int_pow  : Intrinsic<[llvm_anyfloat_ty],
                           [LLVMMatchType<0>, LLVMMatchType<0>]>;
  def int_log  : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
  def int_log10: Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
  def int_log2 : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
  def int_exp  : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
  def int_exp2 : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
}

let Properties = [IntrNoMem] in {
  def int_fma  : Intrinsic<[llvm_anyfloat_ty],
                         [LLVMMatchType<0>, LLVMMatchType<0>,
                          LLVMMatchType<0>]>;
}

// NOTE: these are internal interfaces.
def int_setjmp     : Intrinsic<[llvm_i32_ty],  [llvm_ptr_ty]>;
def int_longjmp    : Intrinsic<[], [llvm_ptr_ty, llvm_i32_ty]>;
def int_sigsetjmp  : Intrinsic<[llvm_i32_ty] , [llvm_ptr_ty, llvm_i32_ty]>;
def int_siglongjmp : Intrinsic<[], [llvm_ptr_ty, llvm_i32_ty]>;

// Internal interface for object size checking
def int_objectsize : Intrinsic<[llvm_anyint_ty], [llvm_ptr_ty, llvm_i1_ty],
                               [IntrNoMem]>,
                               GCCBuiltin<"__builtin_object_size">;

//===------------------------- Expect Intrinsics --------------------------===//
//
def int_expect : Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>,
                                              LLVMMatchType<0>], [IntrNoMem]>;

//===-------------------- Bit Manipulation Intrinsics ---------------------===//
//

// None of these intrinsics accesses memory at all.
let Properties = [IntrNoMem] in {
  def int_bswap: Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>]>;
  def int_ctpop: Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>]>;
  def int_ctlz : Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>]>;
  def int_cttz : Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>]>;
}

//===------------------------ Debugger Intrinsics -------------------------===//
//

// None of these intrinsics accesses memory at all...but that doesn't mean the
// optimizers can change them aggressively.  Special handling needed in a few
// places.
let Properties = [IntrNoMem] in {
  def int_dbg_declare      : Intrinsic<[],
                                       [llvm_metadata_ty, llvm_metadata_ty]>;
  def int_dbg_value  	   : Intrinsic<[],
                                       [llvm_metadata_ty, llvm_i64_ty,
                                        llvm_metadata_ty]>;
}

//===------------------ Exception Handling Intrinsics----------------------===//
//
def int_eh_exception : Intrinsic<[llvm_ptr_ty], [], [IntrReadMem]>;
def int_eh_selector  : Intrinsic<[llvm_i32_ty],
                                 [llvm_ptr_ty, llvm_ptr_ty, llvm_vararg_ty]>;
def int_eh_resume    : Intrinsic<[], [llvm_ptr_ty, llvm_i32_ty], [Throws]>;

// The result of eh.typeid.for depends on the enclosing function, but inside a
// given function it is 'const' and may be CSE'd etc.
def int_eh_typeid_for : Intrinsic<[llvm_i32_ty], [llvm_ptr_ty], [IntrNoMem]>;

def int_eh_return_i32 : Intrinsic<[], [llvm_i32_ty, llvm_ptr_ty]>;
def int_eh_return_i64 : Intrinsic<[], [llvm_i64_ty, llvm_ptr_ty]>;

def int_eh_unwind_init: Intrinsic<[]>,
                        GCCBuiltin<"__builtin_unwind_init">;

def int_eh_dwarf_cfa  : Intrinsic<[llvm_ptr_ty], [llvm_i32_ty]>;

let Properties = [IntrNoMem] in {
  def int_eh_sjlj_lsda             : Intrinsic<[llvm_ptr_ty]>;
  def int_eh_sjlj_callsite         : Intrinsic<[], [llvm_i32_ty]>;
}
def int_eh_sjlj_functioncontext : Intrinsic<[], [llvm_ptr_ty]>;
def int_eh_sjlj_dispatch_setup  : Intrinsic<[], [llvm_i32_ty]>;
def int_eh_sjlj_setjmp          : Intrinsic<[llvm_i32_ty], [llvm_ptr_ty]>;
def int_eh_sjlj_longjmp         : Intrinsic<[], [llvm_ptr_ty]>;

//===---------------- Generic Variable Attribute Intrinsics----------------===//
//
def int_var_annotation : Intrinsic<[],
                                   [llvm_ptr_ty, llvm_ptr_ty,
                                    llvm_ptr_ty, llvm_i32_ty],
                                   [], "llvm.var.annotation">;
def int_ptr_annotation : Intrinsic<[LLVMAnyPointerType<llvm_anyint_ty>],
                                   [LLVMMatchType<0>, llvm_ptr_ty, llvm_ptr_ty,
                                    llvm_i32_ty],
                                   [], "llvm.ptr.annotation">;
def int_annotation : Intrinsic<[llvm_anyint_ty],
                               [LLVMMatchType<0>, llvm_ptr_ty,
                                llvm_ptr_ty, llvm_i32_ty],
                               [], "llvm.annotation">;

//===------------------------ Trampoline Intrinsics -----------------------===//
//
def int_init_trampoline : Intrinsic<[],
                                    [llvm_ptr_ty, llvm_ptr_ty, llvm_ptr_ty],
                                    [IntrReadWriteArgMem, NoCapture<0>]>,
                                   GCCBuiltin<"__builtin_init_trampoline">;

def int_adjust_trampoline : Intrinsic<[llvm_ptr_ty], [llvm_ptr_ty],
                                      [IntrReadArgMem]>,
                                     GCCBuiltin<"__builtin_adjust_trampoline">;

//===------------------------ Overflow Intrinsics -------------------------===//
//

// Expose the carry flag from add operations on two integrals.
def int_sadd_with_overflow : Intrinsic<[llvm_anyint_ty, llvm_i1_ty],
                                       [LLVMMatchType<0>, LLVMMatchType<0>],
                                       [IntrNoMem]>;
def int_uadd_with_overflow : Intrinsic<[llvm_anyint_ty, llvm_i1_ty],
                                       [LLVMMatchType<0>, LLVMMatchType<0>],
                                       [IntrNoMem]>;

def int_ssub_with_overflow : Intrinsic<[llvm_anyint_ty, llvm_i1_ty],
                                       [LLVMMatchType<0>, LLVMMatchType<0>],
                                       [IntrNoMem]>;
def int_usub_with_overflow : Intrinsic<[llvm_anyint_ty, llvm_i1_ty],
                                       [LLVMMatchType<0>, LLVMMatchType<0>],
                                       [IntrNoMem]>;

def int_smul_with_overflow : Intrinsic<[llvm_anyint_ty, llvm_i1_ty],
                                       [LLVMMatchType<0>, LLVMMatchType<0>],
                                       [IntrNoMem]>;
def int_umul_with_overflow : Intrinsic<[llvm_anyint_ty, llvm_i1_ty],
                                       [LLVMMatchType<0>, LLVMMatchType<0>],
                                       [IntrNoMem]>;

//===------------------------- Memory Use Markers -------------------------===//
//
def int_lifetime_start  : Intrinsic<[],
                                    [llvm_i64_ty, llvm_ptr_ty],
                                    [IntrReadWriteArgMem, NoCapture<1>]>;
def int_lifetime_end    : Intrinsic<[],
                                    [llvm_i64_ty, llvm_ptr_ty],
                                    [IntrReadWriteArgMem, NoCapture<1>]>;
def int_invariant_start : Intrinsic<[llvm_descriptor_ty],
                                    [llvm_i64_ty, llvm_ptr_ty],
                                    [IntrReadWriteArgMem, NoCapture<1>]>;
def int_invariant_end   : Intrinsic<[],
                                    [llvm_descriptor_ty, llvm_i64_ty,
                                     llvm_ptr_ty],
                                    [IntrReadWriteArgMem, NoCapture<2>]>;

//===-------------------------- Other Intrinsics --------------------------===//
//
def int_flt_rounds : Intrinsic<[llvm_i32_ty]>,
                     GCCBuiltin<"__builtin_flt_rounds">;
def int_trap : Intrinsic<[]>,
               GCCBuiltin<"__builtin_trap">;

// Intrisics to support half precision floating point format
let Properties = [IntrNoMem] in {
def int_convert_to_fp16   : Intrinsic<[llvm_i16_ty], [llvm_float_ty]>,
                            GCCBuiltin<"__gnu_f2h_ieee">;
def int_convert_from_fp16 : Intrinsic<[llvm_float_ty], [llvm_i16_ty]>,
                            GCCBuiltin<"__gnu_h2f_ieee">;
}

// These convert intrinsics are to support various conversions between
// various types with rounding and saturation. NOTE: avoid using these
// intrinsics as they might be removed sometime in the future and
// most targets don't support them.
def int_convertff  : Intrinsic<[llvm_anyfloat_ty],
                               [llvm_anyfloat_ty, llvm_i32_ty, llvm_i32_ty]>;
def int_convertfsi : Intrinsic<[llvm_anyfloat_ty],
                               [llvm_anyint_ty, llvm_i32_ty, llvm_i32_ty]>;
def int_convertfui : Intrinsic<[llvm_anyfloat_ty],
                               [llvm_anyint_ty, llvm_i32_ty, llvm_i32_ty]>;
def int_convertsif : Intrinsic<[llvm_anyint_ty],
                               [llvm_anyfloat_ty, llvm_i32_ty, llvm_i32_ty]>;
def int_convertuif : Intrinsic<[llvm_anyint_ty],
                               [llvm_anyfloat_ty, llvm_i32_ty, llvm_i32_ty]>;
def int_convertss  : Intrinsic<[llvm_anyint_ty],
                               [llvm_anyint_ty, llvm_i32_ty, llvm_i32_ty]>;
def int_convertsu  : Intrinsic<[llvm_anyint_ty],
                               [llvm_anyint_ty, llvm_i32_ty, llvm_i32_ty]>;
def int_convertus  : Intrinsic<[llvm_anyint_ty],
                               [llvm_anyint_ty, llvm_i32_ty, llvm_i32_ty]>;
def int_convertuu  : Intrinsic<[llvm_anyint_ty],
                               [llvm_anyint_ty, llvm_i32_ty, llvm_i32_ty]>;

//===----------------------------------------------------------------------===//
// Target-specific intrinsics
//===----------------------------------------------------------------------===//

include "llvm/IntrinsicsPowerPC.td"
include "llvm/IntrinsicsX86.td"
include "llvm/IntrinsicsARM.td"
include "llvm/IntrinsicsCellSPU.td"
include "llvm/IntrinsicsXCore.td"
include "llvm/IntrinsicsPTX.td"