LLVM 20.0.0git
AMDGPUMachineFunction.h
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1//===-- AMDGPUMachineFunctionInfo.h -------------------------------*- C++ -*-=//
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#ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUMACHINEFUNCTION_H
10#define LLVM_LIB_TARGET_AMDGPU_AMDGPUMACHINEFUNCTION_H
11
13#include "llvm/ADT/DenseMap.h"
15#include "llvm/IR/DataLayout.h"
16#include "llvm/IR/Function.h"
17#include "llvm/IR/GlobalValue.h"
19
20namespace llvm {
21
22class AMDGPUSubtarget;
23
25 /// A map to keep track of local memory objects and their offsets within the
26 /// local memory space.
28
29protected:
30 uint64_t ExplicitKernArgSize = 0; // Cache for this.
31 Align MaxKernArgAlign; // Cache for this.
32
33 /// Number of bytes in the LDS that are being used.
36
37 /// Number of bytes in the LDS allocated statically. This field is only used
38 /// in the instruction selector and not part of the machine function info.
41
42 /// Align for dynamic shared memory if any. Dynamic shared memory is
43 /// allocated directly after the static one, i.e., LDSSize. Need to pad
44 /// LDSSize to ensure that dynamic one is aligned accordingly.
45 /// The maximal alignment is updated during IR translation or lowering
46 /// stages.
48
49 // Flag to check dynamic LDS usage by kernel.
50 bool UsesDynamicLDS = false;
51
52 // Kernels + shaders. i.e. functions called by the hardware and not called
53 // by other functions.
54 bool IsEntryFunction = false;
55
56 // Entry points called by other functions instead of directly by the hardware.
58
59 // Functions with the amdgpu_cs_chain or amdgpu_cs_chain_preserve CC.
60 bool IsChainFunction = false;
61
62 bool NoSignedZerosFPMath = false;
63
64 // Function may be memory bound.
65 bool MemoryBound = false;
66
67 // Kernel may need limited waves per EU for better performance.
68 bool WaveLimiter = false;
69
70public:
72
75 }
76
78
80 return LDSSize;
81 }
82
84 return GDSSize;
85 }
86
87 bool isEntryFunction() const {
88 return IsEntryFunction;
89 }
90
92
93 bool isChainFunction() const { return IsChainFunction; }
94
95 // The stack is empty upon entry to this function.
96 bool isBottomOfStack() const {
97 return isEntryFunction() || isChainFunction();
98 }
99
101 return NoSignedZerosFPMath;
102 }
103
104 bool isMemoryBound() const {
105 return MemoryBound;
106 }
107
108 bool needsWaveLimiter() const {
109 return WaveLimiter;
110 }
111
112 unsigned allocateLDSGlobal(const DataLayout &DL, const GlobalVariable &GV) {
113 return allocateLDSGlobal(DL, GV, DynLDSAlign);
114 }
115
116 unsigned allocateLDSGlobal(const DataLayout &DL, const GlobalVariable &GV,
117 Align Trailing);
118
119 static std::optional<uint32_t> getLDSKernelIdMetadata(const Function &F);
120 static std::optional<uint32_t> getLDSAbsoluteAddress(const GlobalValue &GV);
121
122 Align getDynLDSAlign() const { return DynLDSAlign; }
123
124 void setDynLDSAlign(const Function &F, const GlobalVariable &GV);
125
126 void setUsesDynamicLDS(bool DynLDS);
127
128 bool isDynamicLDSUsed() const;
129};
130
131}
132#endif
#define AMDGPUSubtarget
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
This file defines the DenseMap class.
#define F(x, y, z)
Definition: MD5.cpp:55
static std::optional< uint32_t > getLDSKernelIdMetadata(const Function &F)
Align DynLDSAlign
Align for dynamic shared memory if any.
uint32_t LDSSize
Number of bytes in the LDS that are being used.
void setDynLDSAlign(const Function &F, const GlobalVariable &GV)
static std::optional< uint32_t > getLDSAbsoluteAddress(const GlobalValue &GV)
unsigned allocateLDSGlobal(const DataLayout &DL, const GlobalVariable &GV)
uint32_t StaticLDSSize
Number of bytes in the LDS allocated statically.
A parsed version of the target data layout string in and methods for querying it.
Definition: DataLayout.h:63
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:39
MachineFunctionInfo - This class can be derived from and used by targets to hold private target-speci...