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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
//===----- ProfDataUtils.cpp - Unit tests for ProfDataUtils ---------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/ProfDataUtils.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
using namespace llvm;
static std::unique_ptr<Module> parseIR(LLVMContext &C, const char *IR) {
SMDiagnostic Err;
std::unique_ptr<Module> Mod = parseAssemblyString(IR, Err, C);
if (!Mod)
Err.print("ProfDataUtilsTests", errs());
return Mod;
}
TEST(ProfDataUtils, extractWeights) {
LLVMContext C;
std::unique_ptr<Module> M = parseIR(C, R"IR(
define void @foo(i1 %cond0) {
entry:
br i1 %cond0, label %bb0, label %bb1, !prof !1
bb0:
%0 = mul i32 1, 2
br label %bb1
bb1:
ret void
}
!1 = !{!"branch_weights", i32 1, i32 100000}
)IR");
Function *F = M->getFunction("foo");
auto &Entry = F->getEntryBlock();
auto &I = Entry.front();
auto *Branch = dyn_cast<BranchInst>(&I);
EXPECT_NE(nullptr, Branch);
auto *ProfileData = Branch->getMetadata(LLVMContext::MD_prof);
EXPECT_NE(ProfileData, nullptr);
EXPECT_TRUE(hasProfMD(I));
SmallVector<uint32_t> Weights;
EXPECT_TRUE(extractBranchWeights(ProfileData, Weights));
EXPECT_EQ(Weights[0], 1U);
EXPECT_EQ(Weights[1], 100000U);
EXPECT_EQ(Weights.size(), 2U);
}
TEST(ProfDataUtils, NoWeights) {
LLVMContext C;
std::unique_ptr<Module> M = parseIR(C, R"IR(
define void @foo(i1 %cond0) {
entry:
br i1 %cond0, label %bb0, label %bb1
bb0:
%0 = mul i32 1, 2
br label %bb1
bb1:
ret void
}
)IR");
Function *F = M->getFunction("foo");
auto &Entry = F->getEntryBlock();
auto &I = Entry.front();
auto *Branch = dyn_cast<BranchInst>(&I);
EXPECT_NE(nullptr, Branch);
auto *ProfileData = Branch->getMetadata(LLVMContext::MD_prof);
EXPECT_EQ(ProfileData, nullptr);
EXPECT_FALSE(hasProfMD(I));
SmallVector<uint32_t> Weights;
EXPECT_FALSE(extractBranchWeights(ProfileData, Weights));
EXPECT_EQ(Weights.size(), 0U);
}
|
