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 // CHECK-SANITIZE-ANYRECOVER: @[[CHAR:.*]] = {{.*}} c"'char **'\00" }
7 // CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_ALIGNMENT_ASSUMPTION:.*]] = {{.*}}, i32 100, i32 35 }, {{.*}} @[[CHAR]] }
8
caller(char ** x,unsigned long offset)9 void *caller(char **x, unsigned long offset) {
10 // CHECK: define{{.*}} ptr @{{.*}}(ptr noundef %[[X:.*]], i64 noundef %[[OFFSET:.*]])
11 // CHECK-NEXT: entry:
12 // CHECK-NEXT: %[[X_ADDR:.*]] = alloca ptr, align 8
13 // CHECK-NEXT: %[[OFFSET_ADDR:.*]] = alloca i64, align 8
14 // CHECK-NEXT: store ptr %[[X]], ptr %[[X_ADDR]], align 8
15 // CHECK-NEXT: store i64 %[[OFFSET]], ptr %[[OFFSET_ADDR]], align 8
16 // CHECK-NEXT: %[[X_RELOADED:.*]] = load ptr, ptr %[[X_ADDR]], align 8
17 // CHECK-NEXT: %[[OFFSET_RELOADED:.*]] = load i64, ptr %[[OFFSET_ADDR]], align 8
18 // CHECK-SANITIZE-NEXT: %[[PTRINT:.*]] = ptrtoint ptr %[[X_RELOADED]] to i64
19 // CHECK-SANITIZE-NEXT: %[[OFFSETPTR:.*]] = sub i64 %[[PTRINT]], %[[OFFSET_RELOADED]]
20 // CHECK-SANITIZE-NEXT: %[[MASKEDPTR:.*]] = and i64 %[[OFFSETPTR]], 4294967295
21 // CHECK-SANITIZE-NEXT: %[[MASKCOND:.*]] = icmp eq i64 %[[MASKEDPTR]], 0
22 // CHECK-SANITIZE-NEXT: %[[PTRINT_DUP:.*]] = ptrtoint ptr %[[X_RELOADED]] to i64, !nosanitize
23 // CHECK-SANITIZE-NEXT: br i1 %[[MASKCOND]], label %[[CONT:.*]], label %[[HANDLER_ALIGNMENT_ASSUMPTION:[^,]+]],{{.*}} !nosanitize
24 // CHECK-SANITIZE: [[HANDLER_ALIGNMENT_ASSUMPTION]]:
25 // CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_alignment_assumption_abort(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 4294967296, i64 %[[OFFSET_RELOADED]]){{.*}}, !nosanitize
26 // CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_alignment_assumption(ptr @[[LINE_100_ALIGNMENT_ASSUMPTION]], i64 %[[PTRINT_DUP]], i64 4294967296, i64 %[[OFFSET_RELOADED]]){{.*}}, !nosanitize
27 // CHECK-SANITIZE-TRAP-NEXT: call void @llvm.ubsantrap(i8 23){{.*}}, !nosanitize
28 // CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
29 // CHECK-SANITIZE: [[CONT]]:
30 // CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr %[[X_RELOADED]], i64 4294967296, i64 %[[OFFSET_RELOADED]]) ]
31 // CHECK-NEXT: ret ptr %[[X_RELOADED]]
32 // CHECK-NEXT: }
33 #line 100
34 return __builtin_assume_aligned(x, 0x100000000, offset);
35 }
36