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| // RUN: %clang_cc1 -x c -S -emit-llvm -o - -triple x86_64-apple-darwin10 %s \
// RUN: -w -fsanitize=signed-integer-overflow,unsigned-integer-overflow,integer-divide-by-zero,float-divide-by-zero \
// RUN: | FileCheck %s
// CHECK-LABEL: define void @foo
// CHECK-NOT: !nosanitize
void foo(const int *p) {
// __builtin_prefetch expects its optional arguments to be constant integers.
// Check that ubsan does not instrument any safe arithmetic performed in
// operands to __builtin_prefetch. (A clang frontend check should reject
// unsafe arithmetic in these operands.)
__builtin_prefetch(p, 0 + 1, 0 + 3);
__builtin_prefetch(p, 1 - 0, 3 - 0);
__builtin_prefetch(p, 1 * 1, 1 * 3);
__builtin_prefetch(p, 1 / 1, 3 / 1);
__builtin_prefetch(p, 3 % 2, 3 % 1);
__builtin_prefetch(p, 0U + 1U, 0U + 3U);
__builtin_prefetch(p, 1U - 0U, 3U - 0U);
__builtin_prefetch(p, 1U * 1U, 1U * 3U);
__builtin_prefetch(p, 1U / 1U, 3U / 1U);
__builtin_prefetch(p, 3U % 2U, 3U % 1U);
}
// CHECK-LABEL: define void @ub_constant_arithmetic
void ub_constant_arithmetic() {
// Check that we still instrument unsafe arithmetic, even if it is known to
// be unsafe at compile time.
int INT_MIN = 0xffffffff;
int INT_MAX = 0x7fffffff;
// CHECK: call void @__ubsan_handle_add_overflow
// CHECK: call void @__ubsan_handle_add_overflow
INT_MAX + 1;
INT_MAX + -1;
// CHECK: call void @__ubsan_handle_negate_overflow
// CHECK: call void @__ubsan_handle_sub_overflow
-INT_MIN;
-INT_MAX - 2;
// CHECK: call void @__ubsan_handle_mul_overflow
// CHECK: call void @__ubsan_handle_mul_overflow
INT_MAX * INT_MAX;
INT_MIN * INT_MIN;
// CHECK: call void @__ubsan_handle_divrem_overflow
// CHECK: call void @__ubsan_handle_divrem_overflow
1 / 0;
INT_MIN / -1;
// CHECK: call void @__ubsan_handle_divrem_overflow
// CHECK: call void @__ubsan_handle_divrem_overflow
1 % 0;
INT_MIN % -1;
// CHECK: call void @__ubsan_handle_divrem_overflow
1.0 / 0.0;
}
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