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
|
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 2
// REQUIRES: bpf-registered-target
// RUN: %clang_cc1 -triple bpf -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s
// Verify that preserve_static_offset does not interfere with
// preserve_access_index at IR generation stage.
#define __ctx __attribute__((preserve_static_offset))
#define __pai __attribute__((preserve_access_index))
struct foo {
int a;
} __ctx __pai;
// CHECK-LABEL: define dso_local i32 @bar
// CHECK-SAME: (ptr noundef [[P:%.*]]) #[[ATTR0:[0-9]+]] {
// CHECK-NEXT: entry:
// CHECK-NEXT: [[P_ADDR:%.*]] = alloca ptr, align 8
// CHECK-NEXT: store ptr [[P]], ptr [[P_ADDR]], align 8
// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[P_ADDR]], align 8
// CHECK-NEXT: [[TMP1:%.*]] = call ptr @llvm.preserve.static.offset(ptr [[TMP0]])
// CHECK-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_FOO:%.*]], ptr [[TMP1]], i32 0, i32 0
// CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[A]], align 4
// CHECK-NEXT: ret i32 [[TMP2]]
//
int bar(struct foo *p) {
return p->a;
}
|
