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
|
/* { dg-require-effective-target vect_double } */
/* { dg-require-effective-target vsx_hw { target { powerpc*-*-* } } } */
/* { dg-require-effective-target sse2_runtime { target { i?86-*-* x86_64-*-* } } } */
/* { dg-additional-options "-O2 -ffast-math -fdump-tree-reassoc1" } */
/* { dg-additional-options "-mvsx" { target { powerpc*-*-* } } } */
/* { dg-additional-options "-msse2" { target { i?86-*-* x86_64-*-* } } } */
/* To test reassoc can undistribute vector bit_field_ref summation.
arg1 and arg2 are two arrays whose elements of type vector double.
Assuming:
A0 = arg1[0], A1 = arg1[1], A2 = arg1[2], A3 = arg1[3],
B0 = arg2[0], B1 = arg2[1], B2 = arg2[2], B3 = arg2[3],
Then:
V0 = A0 * B0, V1 = A1 * B1, V2 = A2 * B2, V3 = A3 * B3,
reassoc transforms
accumulator += V0[0] + V0[1] + V1[0] + V1[1] + V2[0] + V2[1]
+ V3[0] + V3[1];
into:
T = V0 + V1 + V2 + V3
accumulator += T[0] + T[1];
Fewer bit_field_refs, only two for 128 or more bits vector. */
typedef double v2df __attribute__ ((vector_size (16)));
__attribute__ ((noinline)) double
test (double accumulator, v2df arg1[], v2df arg2[])
{
v2df temp;
temp = arg1[0] * arg2[0];
accumulator += temp[0] + temp[1];
temp = arg1[1] * arg2[1];
accumulator += temp[0] + temp[1];
temp = arg1[2] * arg2[2];
accumulator += temp[0] + temp[1];
temp = arg1[3] * arg2[3];
accumulator += temp[0] + temp[1];
return accumulator;
}
extern void abort (void);
int
main ()
{
v2df v2[4] = {{1.0, 2.0}, {4.0, 8.0}, {1.0, 3.0}, {9.0, 27.0}};
v2df v3[4] = {{1.0, 4.0}, {16.0, 64.0}, {1.0, 2.0}, {3.0, 4.0}};
double acc = 100.0;
double res = test (acc, v2, v3);
if (res != 827.0)
abort ();
return 0;
}
/* { dg-final { scan-tree-dump-times "BIT_FIELD_REF" 2 "reassoc1" { target { powerpc*-*-* i?86-*-* x86_64-*-* } } } } */
|
