71 lines · c
1// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -w -emit-llvm -o - %s -fsanitize=builtin | FileCheck %s --check-prefixes=CHECK,POISON2// RUN: %clang_cc1 -triple arm64-none-linux-gnu -w -emit-llvm -o - %s -fsanitize=builtin | FileCheck %s --check-prefixes=CHECK,NOPOISON3 4// A zero input to __bultin_ctz/clz is considered UB even if the target does not5// want to optimize based on zero input being undefined.6 7// CHECK: define{{.*}} void @check_ctz8void check_ctz(int n) {9 // CHECK: [[NOT_ZERO:%.*]] = icmp ne i32 [[N:%.*]], 0, !nosanitize10 // CHECK-NEXT: br i1 [[NOT_ZERO]]11 //12 // Handler block:13 // CHECK: call void @__ubsan_handle_invalid_builtin14 // CHECK-NEXT: unreachable15 //16 // Continuation block:17 // POISON: call i32 @llvm.cttz.i32(i32 [[N]], i1 true)18 // NOPOISON: call i32 @llvm.cttz.i32(i32 [[N]], i1 false)19 __builtin_ctz(n);20 21 // CHECK: call void @__ubsan_handle_invalid_builtin22 __builtin_ctzl(n);23 24 // CHECK: call void @__ubsan_handle_invalid_builtin25 __builtin_ctzll(n);26 27 // CHECK: call void @__ubsan_handle_invalid_builtin28 __builtin_ctzg((unsigned int)n);29}30 31// CHECK: define{{.*}} void @check_clz32void check_clz(int n) {33 // CHECK: [[NOT_ZERO:%.*]] = icmp ne i32 [[N:%.*]], 0, !nosanitize34 // CHECK-NEXT: br i1 [[NOT_ZERO]]35 //36 // Handler block:37 // CHECK: call void @__ubsan_handle_invalid_builtin38 // CHECK-NEXT: unreachable39 //40 // Continuation block:41 // POISON: call i32 @llvm.ctlz.i32(i32 [[N]], i1 true)42 // NOPOISON: call i32 @llvm.ctlz.i32(i32 [[N]], i1 false)43 __builtin_clz(n);44 45 // CHECK: call void @__ubsan_handle_invalid_builtin46 __builtin_clzl(n);47 48 // CHECK: call void @__ubsan_handle_invalid_builtin49 __builtin_clzll(n);50 51 // CHECK: call void @__ubsan_handle_invalid_builtin52 __builtin_clzg((unsigned int)n);53}54 55// CHECK: define{{.*}} void @check_assume56void check_assume(int n) {57 // CHECK: [[TOBOOL:%.*]] = icmp ne i32 [[N:%.*]], 058 // CHECK-NEXT: br i1 [[TOBOOL]]59 //60 // Handler block:61 // CHECK: call void @__ubsan_handle_invalid_builtin62 // CHECK-NEXT: unreachable63 //64 // Continuation block:65 // CHECK: call void @llvm.assume(i1 [[TOBOOL]])66 __builtin_assume(n);67 68 // CHECK: call void @__ubsan_handle_invalid_builtin69 __attribute__((assume(n)));70}71