blob: 54e26ccdadf4c1505e24c78364f2a30eec4f153f (
plain)
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
|
#include <benchmark/benchmark.h>
#ifdef __clang__
#pragma clang diagnostic ignored "-Wreturn-type"
#endif
BENCHMARK_DISABLE_DEPRECATED_WARNING
extern "C" {
extern int ExternInt;
extern int ExternInt2;
extern int ExternInt3;
}
// CHECK-LABEL: test_basic:
extern "C" void test_basic() {
int x;
benchmark::DoNotOptimize(&x);
x = 101;
benchmark::ClobberMemory();
// CHECK: leaq [[DEST:[^,]+]], %rax
// CHECK: movl $101, [[DEST]]
// CHECK: ret
}
// CHECK-LABEL: test_redundant_store:
extern "C" void test_redundant_store() {
ExternInt = 3;
benchmark::ClobberMemory();
ExternInt = 51;
// CHECK-DAG: ExternInt
// CHECK-DAG: movl $3
// CHECK: movl $51
}
// CHECK-LABEL: test_redundant_read:
extern "C" void test_redundant_read() {
int x;
benchmark::DoNotOptimize(&x);
x = ExternInt;
benchmark::ClobberMemory();
x = ExternInt2;
// CHECK: leaq [[DEST:[^,]+]], %rax
// CHECK: ExternInt(%rip)
// CHECK: movl %eax, [[DEST]]
// CHECK-NOT: ExternInt2
// CHECK: ret
}
// CHECK-LABEL: test_redundant_read2:
extern "C" void test_redundant_read2() {
int x;
benchmark::DoNotOptimize(&x);
x = ExternInt;
benchmark::ClobberMemory();
x = ExternInt2;
benchmark::ClobberMemory();
// CHECK: leaq [[DEST:[^,]+]], %rax
// CHECK: ExternInt(%rip)
// CHECK: movl %eax, [[DEST]]
// CHECK: ExternInt2(%rip)
// CHECK: movl %eax, [[DEST]]
// CHECK: ret
}
|
