59 lines · cpp
1// RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s2// 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-UNREACHABLE3// 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-RECOVER4// 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-UNREACHABLE5 6// CHECK-SANITIZE-ANYRECOVER: @[[CHAR:.*]] = {{.*}} c"'B *'\00" }7// CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 35 }, {{.*}} @[[CHAR]] }8 9struct A { int n; };10struct B { int n; };11struct C : A, B {};12 13void *f(C *c) {14 // CHECK: define {{.*}} ptr @{{.*}}(ptr noundef %[[C:.*]]) {{.*}} {15 // CHECK-NEXT: [[ENTRY:.*]]:16 // CHECK-NEXT: %[[C_ADDR:.*]] = alloca ptr17 // CHECK-NEXT: store ptr %[[C]], ptr %[[C_ADDR]]18 // CHECK-NEXT: %[[C_RELOAD:.*]] = load ptr, ptr %[[C_ADDR]]19 // CHECK-NEXT: %[[IS_NULL:.*]] = icmp eq ptr %[[C_RELOAD]], null20 // CHECK-NEXT: br i1 %[[IS_NULL]], label %[[CAST_END:[^,]+]], label %[[CAST_NOT_NULL:[^,]+]]21 // CHECK: [[CAST_NOT_NULL]]:22 // CHECK-NOSANITIZE-NEXT: %[[ADD_PTR:.*]] = getelementptr inbounds i8, ptr %[[C_RELOAD]], i64 423 // CHECK-NOSANITIZE-NEXT: br label %[[CAST_END]]24 // CHECK-SANITIZE-NEXT: %[[PTRTOINT:.*]] = ptrtoint ptr %[[C_RELOAD]] to i64, !nosanitize25 // CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRTOINT]], 3, !nosanitize26 // CHECK-SANITIZE-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0, !nosanitize27 // CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT:[^,]+]], label %[[HANDLER_TYPE_MISMATCH:[^,]+]]28 // CHECK-SANITIZE: [[HANDLER_TYPE_MISMATCH]]:29 // CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_type_mismatch_v1_abort(30 // CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_type_mismatch_v1(31 // CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(32 // CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize33 // CHECK-SANITIZE: [[CONT]]:34 // CHECK-SANITIZE-NEXT: %[[ADD_PTR:.*]] = getelementptr inbounds i8, ptr %[[C_RELOAD]], i64 435 // CHECK-SANITIZE-NEXT: br label %[[CAST_END]]36 // CHECK: [[CAST_END]]:37 // CHECK-NOSANITIZE-NEXT: %[[CAST_RESULT:.*]] = phi ptr [ %[[ADD_PTR]], %[[CAST_NOT_NULL]] ], [ null, %[[ENTRY]] ]38 // CHECK-NOSANITIZE-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr %[[CAST_RESULT]], i64 8) ]39 // CHECK-NOSANITIZE-NEXT: ret ptr %[[CAST_RESULT]]40 // CHECK-NOSANITIZE-NEXT: }41 // CHECK-SANITIZE-NEXT: %[[CAST_RESULT:.*]] = phi ptr [ %[[ADD_PTR]], %[[CONT]] ], [ null, %[[ENTRY]] ]42 // CHECK-SANITIZE-NEXT: %[[PTRINT:.*]] = ptrtoint ptr %[[CAST_RESULT]] to i6443 // CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], 744 // CHECK-SANITIZE-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 045 // CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT1:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize46 // CHECK-SANITIZE: [[HANDLER_ALIGNMENT_ASSUMPTION]]:47 // CHECK-SANITIZE-ANYRECOVER-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint ptr %[[CAST_RESULT]] to i64, !nosanitize48 // CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_alignment_assumption_abort(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 8, i64 0){{.*}}, !nosanitize49 // CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_alignment_assumption(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 8, i64 0){{.*}}, !nosanitize50 // CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 23){{.*}}, !nosanitize51 // CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize52 // CHECK-SANITIZE: [[CONT1]]:53 // CHECK-SANITIZE-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr %[[CAST_RESULT]], i64 8) ]54 // CHECK-SANITIZE-NEXT: ret ptr %[[CAST_RESULT]]55 // CHECK-SANITIZE-NEXT: }56#line 10057 return __builtin_assume_aligned((B*)c, 8);58}59