1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
| //===- AMDGPUPerfHintAnalysis.h ---- analysis of memory traffic -*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
/// \file
/// \brief Analyzes if a function potentially memory bound and if a kernel
/// kernel may benefit from limiting number of waves to reduce cache thrashing.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_AMDGPU_MDGPUPERFHINTANALYSIS_H
#define LLVM_LIB_TARGET_AMDGPU_MDGPUPERFHINTANALYSIS_H
#include "llvm/Analysis/CallGraphSCCPass.h"
#include "llvm/IR/ValueMap.h"
#include "llvm/Pass.h"
namespace llvm {
struct AMDGPUPerfHintAnalysis : public CallGraphSCCPass {
static char ID;
public:
AMDGPUPerfHintAnalysis() : CallGraphSCCPass(ID) {}
bool runOnSCC(CallGraphSCC &SCC) override;
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesAll();
}
bool isMemoryBound(const Function *F) const;
bool needsWaveLimiter(const Function *F) const;
struct FuncInfo {
unsigned MemInstCount;
unsigned InstCount;
unsigned IAMInstCount; // Indirect access memory instruction count
unsigned LSMInstCount; // Large stride memory instruction count
FuncInfo() : MemInstCount(0), InstCount(0), IAMInstCount(0),
LSMInstCount(0) {}
};
typedef ValueMap<const Function*, FuncInfo> FuncInfoMap;
private:
FuncInfoMap FIM;
};
} // namespace llvm
#endif // LLVM_LIB_TARGET_AMDGPU_MDGPUPERFHINTANALYSIS_H
|