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// 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
// Check that call to preserve.static.offset is generated when array
// member of a struct marked with __attribute__((preserve_static_offset))
// is accessed.
#define __ctx __attribute__((preserve_static_offset))
struct foo {
struct {
int a;
} b[7];
} __ctx;
// CHECK-LABEL: define dso_local i32 @arr_access
// 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: [[B:%.*]] = getelementptr inbounds [[STRUCT_FOO:%.*]], ptr [[TMP1]], i32 0, i32 0
// CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [7 x %struct.anon], ptr [[B]], i64 0, i64 2
// CHECK-NEXT: [[A:%.*]] = getelementptr inbounds [[STRUCT_ANON:%.*]], ptr [[ARRAYIDX]], i32 0, i32 0
// CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[A]], align 4
// CHECK-NEXT: ret i32 [[TMP2]]
//
int arr_access(struct foo *p) {
return p->b[2].a;
}
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