45 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"'char **'\00" }7// CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 10 }, {{.*}} @[[CHAR]] }8 9char **__attribute__((assume_aligned(0x100000000, 42))) passthrough(char **x) {10 // CHECK: define{{.*}} ptr @[[PASSTHROUGH:.*]](ptr noundef %[[X:.*]])11 // CHECK-NEXT: entry:12 // CHECK-NEXT: %[[X_ADDR:.*]] = alloca ptr, align 813 // CHECK-NEXT: store ptr %[[X]], ptr %[[X_ADDR]], align 814 // CHECK-NEXT: %[[X_RELOADED:.*]] = load ptr, ptr %[[X_ADDR]], align 815 // CHECK-NEXT: ret ptr %[[X_RELOADED]]16 // CHECK-NEXT: }17 return x;18}19 20char **caller(char **x) {21 // CHECK: define{{.*}} ptr @{{.*}}(ptr noundef %[[X:.*]])22 // CHECK-NEXT: entry:23 // CHECK-NEXT: %[[X_ADDR:.*]] = alloca ptr, align 824 // CHECK-NEXT: store ptr %[[X]], ptr %[[X_ADDR]], align 825 // CHECK-NEXT: %[[X_RELOADED:.*]] = load ptr, ptr %[[X_ADDR]], align 826 // CHECK-NEXT: %[[X_RETURNED:.*]] = call noundef ptr @[[PASSTHROUGH]](ptr noundef %[[X_RELOADED]])27 // CHECK-SANITIZE-NEXT: %[[PTRINT:.*]] = ptrtoint ptr %[[X_RETURNED]] to i6428 // CHECK-SANITIZE-NEXT: %[[OFFSETPTR:.*]] = sub i64 %[[PTRINT]], 4229 // CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[OFFSETPTR]], 429496729530 // CHECK-SANITIZE-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 031 // CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize32 // CHECK-SANITIZE: [[HANDLER_ALIGNMENT_ASSUMPTION]]:33 // CHECK-SANITIZE-ANYRECOVER-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint ptr %[[X_RETURNED]] to i64, !nosanitize34 // CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_alignment_assumption_abort(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 4294967296, i64 42){{.*}}, !nosanitize35 // CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_alignment_assumption(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 4294967296, i64 42){{.*}}, !nosanitize36 // CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 23){{.*}}, !nosanitize37 // CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize38 // CHECK-SANITIZE: [[CONT]]:39 // CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr %[[X_RETURNED]], i64 4294967296, i64 42) ]40 // CHECK-NEXT: ret ptr %[[X_RETURNED]]41 // CHECK-NEXT: }42#line 10043 return passthrough(x);44}45