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1e59de90 TL |
1 | #include <benchmark/benchmark.h> |
2 | ||
3 | #ifdef __clang__ | |
4 | #pragma clang diagnostic ignored "-Wreturn-type" | |
5 | #endif | |
6 | ||
7 | extern "C" { | |
8 | ||
9 | extern int ExternInt; | |
10 | extern int ExternInt2; | |
11 | extern int ExternInt3; | |
12 | ||
13 | inline int Add42(int x) { return x + 42; } | |
14 | ||
15 | struct NotTriviallyCopyable { | |
16 | NotTriviallyCopyable(); | |
17 | explicit NotTriviallyCopyable(int x) : value(x) {} | |
18 | NotTriviallyCopyable(NotTriviallyCopyable const&); | |
19 | int value; | |
20 | }; | |
21 | ||
22 | struct Large { | |
23 | int value; | |
24 | int data[2]; | |
25 | }; | |
26 | ||
27 | } | |
28 | // CHECK-LABEL: test_with_rvalue: | |
29 | extern "C" void test_with_rvalue() { | |
30 | benchmark::DoNotOptimize(Add42(0)); | |
31 | // CHECK: movl $42, %eax | |
32 | // CHECK: ret | |
33 | } | |
34 | ||
35 | // CHECK-LABEL: test_with_large_rvalue: | |
36 | extern "C" void test_with_large_rvalue() { | |
37 | benchmark::DoNotOptimize(Large{ExternInt, {ExternInt, ExternInt}}); | |
38 | // CHECK: ExternInt(%rip) | |
39 | // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]] | |
40 | // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]]) | |
41 | // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]]) | |
42 | // CHECK: ret | |
43 | } | |
44 | ||
45 | // CHECK-LABEL: test_with_non_trivial_rvalue: | |
46 | extern "C" void test_with_non_trivial_rvalue() { | |
47 | benchmark::DoNotOptimize(NotTriviallyCopyable(ExternInt)); | |
48 | // CHECK: mov{{l|q}} ExternInt(%rip) | |
49 | // CHECK: ret | |
50 | } | |
51 | ||
52 | // CHECK-LABEL: test_with_lvalue: | |
53 | extern "C" void test_with_lvalue() { | |
54 | int x = 101; | |
55 | benchmark::DoNotOptimize(x); | |
56 | // CHECK-GNU: movl $101, %eax | |
57 | // CHECK-CLANG: movl $101, -{{[0-9]+}}(%[[REG:[a-z]+]]) | |
58 | // CHECK: ret | |
59 | } | |
60 | ||
61 | // CHECK-LABEL: test_with_large_lvalue: | |
62 | extern "C" void test_with_large_lvalue() { | |
63 | Large L{ExternInt, {ExternInt, ExternInt}}; | |
64 | benchmark::DoNotOptimize(L); | |
65 | // CHECK: ExternInt(%rip) | |
66 | // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]]) | |
67 | // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]]) | |
68 | // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]]) | |
69 | // CHECK: ret | |
70 | } | |
71 | ||
72 | // CHECK-LABEL: test_with_non_trivial_lvalue: | |
73 | extern "C" void test_with_non_trivial_lvalue() { | |
74 | NotTriviallyCopyable NTC(ExternInt); | |
75 | benchmark::DoNotOptimize(NTC); | |
76 | // CHECK: ExternInt(%rip) | |
77 | // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]]) | |
78 | // CHECK: ret | |
79 | } | |
80 | ||
81 | // CHECK-LABEL: test_with_const_lvalue: | |
82 | extern "C" void test_with_const_lvalue() { | |
83 | const int x = 123; | |
84 | benchmark::DoNotOptimize(x); | |
85 | // CHECK: movl $123, %eax | |
86 | // CHECK: ret | |
87 | } | |
88 | ||
89 | // CHECK-LABEL: test_with_large_const_lvalue: | |
90 | extern "C" void test_with_large_const_lvalue() { | |
91 | const Large L{ExternInt, {ExternInt, ExternInt}}; | |
92 | benchmark::DoNotOptimize(L); | |
93 | // CHECK: ExternInt(%rip) | |
94 | // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]]) | |
95 | // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]]) | |
96 | // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]]) | |
97 | // CHECK: ret | |
98 | } | |
99 | ||
100 | // CHECK-LABEL: test_with_non_trivial_const_lvalue: | |
101 | extern "C" void test_with_non_trivial_const_lvalue() { | |
102 | const NotTriviallyCopyable Obj(ExternInt); | |
103 | benchmark::DoNotOptimize(Obj); | |
104 | // CHECK: mov{{q|l}} ExternInt(%rip) | |
105 | // CHECK: ret | |
106 | } | |
107 | ||
108 | // CHECK-LABEL: test_div_by_two: | |
109 | extern "C" int test_div_by_two(int input) { | |
110 | int divisor = 2; | |
111 | benchmark::DoNotOptimize(divisor); | |
112 | return input / divisor; | |
113 | // CHECK: movl $2, [[DEST:.*]] | |
114 | // CHECK: idivl [[DEST]] | |
115 | // CHECK: ret | |
116 | } | |
117 | ||
118 | // CHECK-LABEL: test_inc_integer: | |
119 | extern "C" int test_inc_integer() { | |
120 | int x = 0; | |
121 | for (int i=0; i < 5; ++i) | |
122 | benchmark::DoNotOptimize(++x); | |
123 | // CHECK: movl $1, [[DEST:.*]] | |
124 | // CHECK: {{(addl \$1,|incl)}} [[DEST]] | |
125 | // CHECK: {{(addl \$1,|incl)}} [[DEST]] | |
126 | // CHECK: {{(addl \$1,|incl)}} [[DEST]] | |
127 | // CHECK: {{(addl \$1,|incl)}} [[DEST]] | |
128 | // CHECK-CLANG: movl [[DEST]], %eax | |
129 | // CHECK: ret | |
130 | return x; | |
131 | } | |
132 | ||
133 | // CHECK-LABEL: test_pointer_rvalue | |
134 | extern "C" void test_pointer_rvalue() { | |
135 | // CHECK: movl $42, [[DEST:.*]] | |
136 | // CHECK: leaq [[DEST]], %rax | |
137 | // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]]) | |
138 | // CHECK: ret | |
139 | int x = 42; | |
140 | benchmark::DoNotOptimize(&x); | |
141 | } | |
142 | ||
143 | // CHECK-LABEL: test_pointer_const_lvalue: | |
144 | extern "C" void test_pointer_const_lvalue() { | |
145 | // CHECK: movl $42, [[DEST:.*]] | |
146 | // CHECK: leaq [[DEST]], %rax | |
147 | // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]]) | |
148 | // CHECK: ret | |
149 | int x = 42; | |
150 | int * const xp = &x; | |
151 | benchmark::DoNotOptimize(xp); | |
152 | } | |
153 | ||
154 | // CHECK-LABEL: test_pointer_lvalue: | |
155 | extern "C" void test_pointer_lvalue() { | |
156 | // CHECK: movl $42, [[DEST:.*]] | |
157 | // CHECK: leaq [[DEST]], %rax | |
158 | // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z+]+]]) | |
159 | // CHECK: ret | |
160 | int x = 42; | |
161 | int *xp = &x; | |
162 | benchmark::DoNotOptimize(xp); | |
163 | } |