| // 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; |
| } |