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comparison gcc/testsuite/gcc.dg/vect/vect-over-widen-7.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
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111:04ced10e8804 131:84e7813d76e9
1 /* { dg-require-effective-target vect_int } */
2 /* { dg-require-effective-target vect_shift } */
3 /* { dg-require-effective-target vect_pack_trunc } */
4 /* { dg-require-effective-target vect_unpack } */
5
6 #include "tree-vect.h"
7
8 #ifndef SIGNEDNESS
9 #define SIGNEDNESS signed
10 #define BASE_B -128
11 #define BASE_C -100
12 #define D -120
13 #endif
14
15 #define N 50
16
17 /* Both range analysis and backward propagation from the truncation show
18 that these calculations can be done in SIGNEDNESS short. */
19 void __attribute__ ((noipa))
20 f (SIGNEDNESS char *restrict a, SIGNEDNESS char *restrict b,
21 SIGNEDNESS char *restrict c, SIGNEDNESS char d)
22 {
23 int promoted_d = d;
24 for (int i = 0; i < N; ++i)
25 /* Deliberate use of signed >>. */
26 a[i] = (b[i] + c[i] + promoted_d) >> 2;
27 }
28
29 int
30 main (void)
31 {
32 check_vect ();
33
34 SIGNEDNESS char a[N], b[N], c[N];
35 for (int i = 0; i < N; ++i)
36 {
37 b[i] = BASE_B + i * 5;
38 c[i] = BASE_C + i * 4;
39 asm volatile ("" ::: "memory");
40 }
41 f (a, b, c, D);
42 for (int i = 0; i < N; ++i)
43 if (a[i] != (BASE_B + BASE_C + D + i * 9) >> 2)
44 __builtin_abort ();
45
46 return 0;
47 }
48
49 /* { dg-final { scan-tree-dump {Splitting statement} "vect" } } */
50 /* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* \+ } "vect" } } */
51 /* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* >> 2} "vect" } } */
52 /* { dg-final { scan-tree-dump {vect_recog_cast_forwprop_pattern: detected:[^\n]* \(signed char\)} "vect" } } */
53 /* { dg-final { scan-tree-dump-not {vector[^ ]* int} "vect" } } */
54 /* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" } } */