1 // NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 2 2 // REQUIRES: bpf-registered-target 3 // RUN: %clang_cc1 -triple bpf -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s 4 5 // Check that call to preserve.static.offset is generated when field of 6 // a struct marked with __attribute__((preserve_static_offset)) is accessed. 7 8 #define __ctx __attribute__((preserve_static_offset)) 9 10 struct foo { 11 int a; 12 } __ctx; 13 14 // CHECK-LABEL: define dso_local void @lvalue 15 // CHECK-SAME: (ptr noundef [[P:%.*]]) #[[ATTR0:[0-9]+]] { 16 // CHECK-NEXT: entry: 17 // CHECK-NEXT: [[P_ADDR:%.*]] = alloca ptr, align 8 18 // CHECK-NEXT: store ptr [[P]], ptr [[P_ADDR]], align 8 19 // CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[P_ADDR]], align 8 20 // CHECK-NEXT: [[TMP1:%.*]] = call ptr @llvm.preserve.static.offset(ptr [[TMP0]]) 21 // CHECK-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_FOO:%.*]], ptr [[TMP1]], i32 0, i32 0 22 // CHECK-NEXT: store i32 42, ptr [[A]], align 4 23 // CHECK-NEXT: ret void 24 // 25 void lvalue(struct foo *p) { 26 p->a = 42; 27 } 28