clang/test/CodeGen/bpf-attr-preserve-access-index-7.c

   1 // REQUIRES: bpf-registered-target
   2 // RUN: %clang_cc1 -triple bpf -emit-llvm -debug-info-kind=limited -disable-llvm-passes %s -o - | FileCheck %s
   3
   4 #define __reloc__ __attribute__((preserve_access_index))
   5
   6 // chain of records, all with attributes
   7 struct __reloc__ s1;
   8 struct __reloc__ s2;
   9 struct __reloc__ s3;
  10
  11 struct s1 {
  12   int c;
  13 };
  14 typedef struct s1 __s1;
  15
  16 struct s2 {
  17   union {
  18     __s1 b[3];
  19   };
  20 };
  21 typedef struct s2 __s2;
  22
  23 struct s3 {
  24   __s2 a;
  25 };
  26 typedef struct s3 __s3;
  27
  28 int test(__s3 *arg) {
  29   return arg->a.b[2].c;
  30 }
  31
  32 // CHECK: call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.s3) %{{[0-9a-z]+}}, i32 0, i32 0)
  33 // CHECK: call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.s2) %{{[0-9a-z]+}}, i32 0, i32 0)
  34 // CHECK: call ptr @llvm.preserve.union.access.index.p0.p0(ptr %{{[0-9a-z]+}}, i32 0)
  35 // CHECK: call ptr @llvm.preserve.array.access.index.p0.p0(ptr elementtype([3 x %struct.s1]) %{{[0-9a-z]+}}, i32 1, i32 2)
  36 // CHECK: call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.s1) %{{[0-9a-z]+}}, i32 0, i32 0)