diff options
Diffstat (limited to 'test/CodeGen/catch-alignment-assumption-attribute-align_value-on-lvalue.cpp')
| -rw-r--r-- | test/CodeGen/catch-alignment-assumption-attribute-align_value-on-lvalue.cpp | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/test/CodeGen/catch-alignment-assumption-attribute-align_value-on-lvalue.cpp b/test/CodeGen/catch-alignment-assumption-attribute-align_value-on-lvalue.cpp new file mode 100644 index 0000000000000..96d264190bec7 --- /dev/null +++ b/test/CodeGen/catch-alignment-assumption-attribute-align_value-on-lvalue.cpp @@ -0,0 +1,40 @@ +// RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,CHECK-NOSANITIZE +// 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 +// 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 +// 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 + +typedef char **__attribute__((align_value(0x80000000))) aligned_char; + +struct ac_struct { + // CHECK: %[[STRUCT_AC_STRUCT:.*]] = type { i8** } + aligned_char a; +}; + +// CHECK-SANITIZE-ANYRECOVER: @[[ALIGNED_CHAR:.*]] = {{.*}} c"'aligned_char' (aka 'char **')\00" } +// CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 13 }, {{.*}}* @[[ALIGNED_CHAR]] } + +char **load_from_ac_struct(struct ac_struct *x) { + // CHECK: define i8** @{{.*}}(%[[STRUCT_AC_STRUCT]]* %[[X:.*]]) + // CHECK-NEXT: [[ENTRY:.*]]: + // CHECK-NEXT: %[[STRUCT_AC_STRUCT_ADDR:.*]] = alloca %[[STRUCT_AC_STRUCT]]*, align 8 + // CHECK-NEXT: store %[[STRUCT_AC_STRUCT]]* %[[X]], %[[STRUCT_AC_STRUCT]]** %[[STRUCT_AC_STRUCT_ADDR]], align 8 + // CHECK-NEXT: %[[X_RELOADED:.*]] = load %[[STRUCT_AC_STRUCT]]*, %[[STRUCT_AC_STRUCT]]** %[[STRUCT_AC_STRUCT_ADDR]], align 8 + // CHECK: %[[A_ADDR:.*]] = getelementptr inbounds %[[STRUCT_AC_STRUCT]], %[[STRUCT_AC_STRUCT]]* %[[X_RELOADED]], i32 0, i32 0 + // CHECK: %[[A:.*]] = load i8**, i8*** %[[A_ADDR]], align 8 + // CHECK-NEXT: %[[PTRINT:.*]] = ptrtoint i8** %[[A]] to i64 + // CHECK-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[PTRINT]], 2147483647 + // CHECK-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0 + // CHECK-SANITIZE-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint i8** %[[A]] to i64, !nosanitize + // CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize + // CHECK-SANITIZE: [[HANDLER_ALIGNMENT_ASSUMPTION]]: + // CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_alignment_assumption_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}, {{{.*}}}* }* @[[LINE_100_ALIGNMENT_ASSUMPTION]] to i8*), i64 %[[PTRINT_DUP]], i64 2147483648, i64 0){{.*}}, !nosanitize + // CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_alignment_assumption(i8* bitcast ({ {{{.*}}}, {{{.*}}}, {{{.*}}}* }* @[[LINE_100_ALIGNMENT_ASSUMPTION]] to i8*), i64 %[[PTRINT_DUP]], i64 2147483648, i64 0){{.*}}, !nosanitize + // CHECK-SANITIZE-TRAP-NEXT: call void @llvm.trap(){{.*}}, !nosanitize + // CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize + // CHECK-SANITIZE: [[CONT]]: + // CHECK-NEXT: call void @llvm.assume(i1 %[[MASKCOND]]) + // CHECK-NEXT: ret i8** %[[A]] + // CHECK-NEXT: } +#line 100 + return x->a; +} |