1 // RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s 2 // RUN: %clang_cc1 -fsanitize=alignment -fno-sanitize-recover=alignment -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_alignment_assumption" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-NORECOVER,CHECK-SANITIZE-UNREACHABLE 3 // RUN: %clang_cc1 -fsanitize=alignment -fsanitize-recover=alignment -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_alignment_assumption" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-RECOVER 4 // RUN: %clang_cc1 -fsanitize=alignment -fsanitize-trap=alignment -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_alignment_assumption" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-TRAP,CHECK-SANITIZE-UNREACHABLE 5 6 typedef char **__attribute__((align_value(0x100000000))) aligned_char; 7 8 struct ac_struct { 9 // CHECK: %[[STRUCT_AC_STRUCT:.*]] = type { ptr } 10 aligned_char a; 11 }; 12 13 // CHECK-SANITIZE-ANYRECOVER: @[[ALIGNED_CHAR:.*]] = {{.*}} c"'aligned_char' (aka 'char **')\00" } 14 // CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 13 }, {{.*}} @[[ALIGNED_CHAR]] } 15 16 char **load_from_ac_struct(struct ac_struct *x) { 17 // CHECK: define{{.*}} ptr @{{.*}}(ptr noundef %[[X:.*]]) 18 // CHECK-NEXT: [[ENTRY:.*]]: 19 // CHECK-NEXT: %[[STRUCT_AC_STRUCT_ADDR:.*]] = alloca ptr, align 8 20 // CHECK-NEXT: store ptr %[[X]], ptr %[[STRUCT_AC_STRUCT_ADDR]], align 8 21 // CHECK-NEXT: %[[X_RELOADED:.*]] = load ptr, ptr %[[STRUCT_AC_STRUCT_ADDR]], align 8 22 // CHECK: %[[A_ADDR:.*]] = getelementptr inbounds nuw %[[STRUCT_AC_STRUCT]], ptr %[[X_RELOADED]], i32 0, i32 0 23 // CHECK: %[[A:.*]] = load ptr, ptr %[[A_ADDR]], align 8 24 // CHECK-SANITIZE-NEXT: %[[PTRINT:.*]] = ptrtoint ptr %[[A]] to i64 25 // CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], 4294967295 26 // CHECK-SANITIZE-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0 27 // CHECK-SANITIZE-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint ptr %[[A]] to i64, !nosanitize 28 // CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize 29 // CHECK-SANITIZE: [[HANDLER_ALIGNMENT_ASSUMPTION]]: 30 // CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_alignment_assumption_abort(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 4294967296, i64 0){{.*}}, !nosanitize 31 // CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_alignment_assumption(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 4294967296, i64 0){{.*}}, !nosanitize 32 // CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 23){{.*}}, !nosanitize 33 // CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize 34 // CHECK-SANITIZE: [[CONT]]: 35 // CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr %[[A]], i64 4294967296) ] 36 // CHECK-NEXT: ret ptr %[[A]] 37 // CHECK-NEXT: } 38 #line 100 39 return x->a; 40 } 41