LLVM 20.0.0git
VectorBuilder.cpp
Go to the documentation of this file.
1//===- VectorBuilder.cpp - Builder for VP Intrinsics ----------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the VectorBuilder class, which is used as a convenient
10// way to create VP intrinsics as if they were LLVM instructions with a
11// consistent and simplified interface.
12//
13//===----------------------------------------------------------------------===//
14
16#include <llvm/IR/FPEnv.h>
19#include <llvm/IR/Intrinsics.h>
21
22namespace llvm {
23
24void VectorBuilder::handleError(const char *ErrorMsg) const {
25 if (ErrorHandling == Behavior::SilentlyReturnNone)
26 return;
27 report_fatal_error(ErrorMsg);
28}
29
31 return *Builder.GetInsertBlock()->getModule();
32}
33
35 return Builder.getAllOnesMask(StaticVectorLength);
36}
37
38Value &VectorBuilder::requestMask() {
39 if (Mask)
40 return *Mask;
41
42 return *getAllTrueMask();
43}
44
45Value &VectorBuilder::requestEVL() {
46 if (ExplicitVectorLength)
47 return *ExplicitVectorLength;
48
49 assert(!StaticVectorLength.isScalable() && "TODO vscale lowering");
50 auto *IntTy = Builder.getInt32Ty();
51 return *ConstantInt::get(IntTy, StaticVectorLength.getFixedValue());
52}
53
55 ArrayRef<Value *> InstOpArray,
56 const Twine &Name) {
57 auto VPID = VPIntrinsic::getForOpcode(Opcode);
58 if (VPID == Intrinsic::not_intrinsic)
59 return returnWithError<Value *>("No VPIntrinsic for this opcode");
60 return createVectorInstructionImpl(VPID, ReturnTy, InstOpArray, Name);
61}
62
64 Type *ValTy,
65 ArrayRef<Value *> InstOpArray,
66 const Twine &Name) {
67 auto VPID = VPIntrinsic::getForIntrinsic(RdxID);
69 "No VPIntrinsic for this reduction");
70 return createVectorInstructionImpl(VPID, ValTy, InstOpArray, Name);
71}
72
73Value *VectorBuilder::createVectorInstructionImpl(Intrinsic::ID VPID,
74 Type *ReturnTy,
75 ArrayRef<Value *> InstOpArray,
76 const Twine &Name) {
77 auto MaskPosOpt = VPIntrinsic::getMaskParamPos(VPID);
78 auto VLenPosOpt = VPIntrinsic::getVectorLengthParamPos(VPID);
79 size_t NumInstParams = InstOpArray.size();
80 size_t NumVPParams =
81 NumInstParams + MaskPosOpt.has_value() + VLenPosOpt.has_value();
82
83 SmallVector<Value *, 6> IntrinParams;
84
85 // Whether the mask and vlen parameter are at the end of the parameter list.
86 bool TrailingMaskAndVLen =
87 std::min<size_t>(MaskPosOpt.value_or(NumInstParams),
88 VLenPosOpt.value_or(NumInstParams)) >= NumInstParams;
89
90 if (TrailingMaskAndVLen) {
91 // Fast path for trailing mask, vector length.
92 IntrinParams.append(InstOpArray.begin(), InstOpArray.end());
93 IntrinParams.resize(NumVPParams);
94 } else {
95 IntrinParams.resize(NumVPParams);
96 // Insert mask and evl operands in between the instruction operands.
97 for (size_t VPParamIdx = 0, ParamIdx = 0; VPParamIdx < NumVPParams;
98 ++VPParamIdx) {
99 if (MaskPosOpt == VPParamIdx || VLenPosOpt == VPParamIdx)
100 continue;
101 assert(ParamIdx < NumInstParams);
102 IntrinParams[VPParamIdx] = InstOpArray[ParamIdx++];
103 }
104 }
105
106 if (MaskPosOpt)
107 IntrinParams[*MaskPosOpt] = &requestMask();
108 if (VLenPosOpt)
109 IntrinParams[*VLenPosOpt] = &requestEVL();
110
112 &getModule(), VPID, ReturnTy, IntrinParams);
113 return Builder.CreateCall(VPDecl, IntrinParams, Name);
114}
115
116} // namespace llvm
std::string Name
This file contains the declarations of entities that describe floating point environment and related ...
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
This file defines the SmallVector class.
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition: ArrayRef.h:41
iterator end() const
Definition: ArrayRef.h:157
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:168
iterator begin() const
Definition: ArrayRef.h:156
const Module * getModule() const
Return the module owning the function this basic block belongs to, or nullptr if the function does no...
Definition: BasicBlock.cpp:292
IntegerType * getInt32Ty()
Fetch the type representing a 32-bit integer.
Definition: IRBuilder.h:523
BasicBlock * GetInsertBlock() const
Definition: IRBuilder.h:171
Value * getAllOnesMask(ElementCount NumElts)
Return an all true boolean vector (mask) with NumElts lanes.
Definition: IRBuilder.h:844
CallInst * CreateCall(FunctionType *FTy, Value *Callee, ArrayRef< Value * > Args={}, const Twine &Name="", MDNode *FPMathTag=nullptr)
Definition: IRBuilder.h:2444
A Module instance is used to store all the information related to an LLVM module.
Definition: Module.h:65
void append(ItTy in_start, ItTy in_end)
Add the specified range to the end of the SmallVector.
Definition: SmallVector.h:683
void resize(size_type N)
Definition: SmallVector.h:638
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
Definition: SmallVector.h:1196
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:81
The instances of the Type class are immutable: once they are created, they are never changed.
Definition: Type.h:45
static std::optional< unsigned > getMaskParamPos(Intrinsic::ID IntrinsicID)
static std::optional< unsigned > getVectorLengthParamPos(Intrinsic::ID IntrinsicID)
static Intrinsic::ID getForOpcode(unsigned OC)
The llvm.vp.* intrinsics for this instruction Opcode.
static Function * getOrInsertDeclarationForParams(Module *M, Intrinsic::ID, Type *ReturnType, ArrayRef< Value * > Params)
Declares a llvm.vp.
static Intrinsic::ID getForIntrinsic(Intrinsic::ID Id)
The llvm.vp.
static bool isVPReduction(Intrinsic::ID ID)
LLVM Value Representation.
Definition: Value.h:74
Value * createSimpleReduction(Intrinsic::ID RdxID, Type *ValTy, ArrayRef< Value * > VecOpArray, const Twine &Name=Twine())
Emit a VP reduction intrinsic call for recurrence kind.
Module & getModule() const
Value * createVectorInstruction(unsigned Opcode, Type *ReturnTy, ArrayRef< Value * > VecOpArray, const Twine &Name=Twine())
constexpr ScalarTy getFixedValue() const
Definition: TypeSize.h:202
constexpr bool isScalable() const
Returns whether the quantity is scaled by a runtime quantity (vscale).
Definition: TypeSize.h:171
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
void report_fatal_error(Error Err, bool gen_crash_diag=true)
Report a serious error, calling any installed error handler.
Definition: Error.cpp:167