45 lines · cpp
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 %s2 3// Testcase from llvm.org/PR320564 5extern "C" int printf (const char *__restrict __format, ...);6 7typedef double __m256d __attribute__((__vector_size__(32)));8 9static __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 15struct A {16 A () {17// Check that the TBAA information generated for the stores to the18// 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 36int 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