1 //===- llvm/unittest/IR/UseTest.cpp - Use unit tests ----------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/AsmParser/Parser.h"
11 #include "llvm/IR/Function.h"
12 #include "llvm/IR/LLVMContext.h"
13 #include "llvm/IR/Module.h"
14 #include "llvm/IR/User.h"
15 #include "llvm/Support/Format.h"
16 #include "llvm/Support/SourceMgr.h"
17 #include "gtest/gtest.h"
18 
19 using namespace llvm;
20 
21 namespace {
22 
23 TEST(UseTest, sort) {
24   LLVMContext C;
25 
26   const char *ModuleString = "define void @f(i32 %x) {\n"
27                              "entry:\n"
28                              "  %v0 = add i32 %x, 0\n"
29                              "  %v2 = add i32 %x, 2\n"
30                              "  %v5 = add i32 %x, 5\n"
31                              "  %v1 = add i32 %x, 1\n"
32                              "  %v3 = add i32 %x, 3\n"
33                              "  %v7 = add i32 %x, 7\n"
34                              "  %v6 = add i32 %x, 6\n"
35                              "  %v4 = add i32 %x, 4\n"
36                              "  ret void\n"
37                              "}\n";
38   SMDiagnostic Err;
39   char vnbuf[8];
40   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
41   Function *F = M->getFunction("f");
42   ASSERT_TRUE(F);
43   ASSERT_TRUE(F->arg_begin() != F->arg_end());
44   Argument &X = *F->arg_begin();
45   ASSERT_EQ("x", X.getName());
46 
47   X.sortUseList([](const Use &L, const Use &R) {
48     return L.getUser()->getName() < R.getUser()->getName();
49   });
50   unsigned I = 0;
51   for (User *U : X.users()) {
52     format("v%u", I++).snprint(vnbuf, sizeof(vnbuf));
53     EXPECT_EQ(vnbuf, U->getName());
54   }
55   ASSERT_EQ(8u, I);
56 
57   X.sortUseList([](const Use &L, const Use &R) {
58     return L.getUser()->getName() > R.getUser()->getName();
59   });
60   I = 0;
61   for (User *U : X.users()) {
62     format("v%u", (7 - I++)).snprint(vnbuf, sizeof(vnbuf));
63     EXPECT_EQ(vnbuf, U->getName());
64   }
65   ASSERT_EQ(8u, I);
66 }
67 
68 TEST(UseTest, reverse) {
69   LLVMContext C;
70 
71   const char *ModuleString = "define void @f(i32 %x) {\n"
72                              "entry:\n"
73                              "  %v0 = add i32 %x, 0\n"
74                              "  %v2 = add i32 %x, 2\n"
75                              "  %v5 = add i32 %x, 5\n"
76                              "  %v1 = add i32 %x, 1\n"
77                              "  %v3 = add i32 %x, 3\n"
78                              "  %v7 = add i32 %x, 7\n"
79                              "  %v6 = add i32 %x, 6\n"
80                              "  %v4 = add i32 %x, 4\n"
81                              "  ret void\n"
82                              "}\n";
83   SMDiagnostic Err;
84   char vnbuf[8];
85   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
86   Function *F = M->getFunction("f");
87   ASSERT_TRUE(F);
88   ASSERT_TRUE(F->arg_begin() != F->arg_end());
89   Argument &X = *F->arg_begin();
90   ASSERT_EQ("x", X.getName());
91 
92   X.sortUseList([](const Use &L, const Use &R) {
93     return L.getUser()->getName() < R.getUser()->getName();
94   });
95   unsigned I = 0;
96   for (User *U : X.users()) {
97     format("v%u", I++).snprint(vnbuf, sizeof(vnbuf));
98     EXPECT_EQ(vnbuf, U->getName());
99   }
100   ASSERT_EQ(8u, I);
101 
102   X.reverseUseList();
103   I = 0;
104   for (User *U : X.users()) {
105     format("v%u", (7 - I++)).snprint(vnbuf, sizeof(vnbuf));
106     EXPECT_EQ(vnbuf, U->getName());
107   }
108   ASSERT_EQ(8u, I);
109 }
110 
111 } // end anonymous namespace
112