1 // RUN: %clang_cc1 %s -O1 -std=c++11 -triple x86_64-unknown-linux-gnu -target-cpu x86-64 -target-feature +sse4.2 -target-feature +avx -emit-llvm -o - | FileCheck %s
2 
3 // Testcase from llvm.org/PR32056
4 
5 extern "C" int printf (const char *__restrict __format, ...);
6 
7 typedef double __m256d __attribute__((__vector_size__(32)));
8 
9 static __inline __m256d __attribute__((__always_inline__, __nodebug__,
10                                        __target__("avx")))
11 _mm256_setr_pd(double __a, double __b, double __c, double __d) {
12   return (__m256d){ __a, __b, __c, __d };
13 }
14 
15 struct A {
16   A () {
17 // Check that the TBAA information generated for the stores to the
18 // union members is based on the omnipotent char.
19 // CHECK: store <4 x double>
20 // CHECK: tbaa ![[OCPATH:[0-9]+]]
21 // CHECK: store <4 x double>
22 // CHECK: tbaa ![[OCPATH]]
23     a = _mm256_setr_pd(0.0, 1.0, 2.0, 3.0);
24     b = _mm256_setr_pd(4.0, 5.0, 6.0, 7.0);
25   }
26 
27   const double *begin() { return c; }
28   const double *end() { return c+8; }
29 
30   union {
31     struct { __m256d a, b; };
32     double c[8];
33   };
34 };
35 
36 int main(int argc, char *argv[]) {
37   A a;
38   for (double value : a)
39     printf("%f ", value);
40   return 0;
41 }
42 
43 // CHECK-DAG: ![[CHAR:[0-9]+]] = !{!"omnipotent char"
44 // CHECK-DAG: ![[OCPATH]] = !{![[CHAR]], ![[CHAR]], i64 0}
45