| // RUN: %clang_cc1 -triple=x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s |
| |
| // PR8839 |
| extern "C" char memmove(); |
| |
| int main() { |
| // CHECK: call {{signext i8|i8}} @memmove() |
| return memmove(); |
| } |
| |
| struct S; |
| // CHECK: define {{.*}} @_Z9addressofbR1SS0_( |
| S *addressof(bool b, S &s, S &t) { |
| // CHECK: %[[LVALUE:.*]] = phi |
| // CHECK: ret {{.*}}* %[[LVALUE]] |
| return __builtin_addressof(b ? s : t); |
| } |
| |
| extern "C" int __builtin_abs(int); // #1 |
| long __builtin_abs(long); // #2 |
| extern "C" int __builtin_abs(int); // #3 |
| |
| int x = __builtin_abs(-2); |
| // CHECK: store i32 2, i32* @x, align 4 |
| |
| long y = __builtin_abs(-2l); |
| // CHECK: [[Y:%.+]] = call i64 @_Z13__builtin_absl(i64 -2) |
| // CHECK: store i64 [[Y]], i64* @y, align 8 |
| |
| extern const char char_memchr_arg[32]; |
| char *memchr_result = __builtin_char_memchr(char_memchr_arg, 123, 32); |
| // CHECK: call i8* @memchr(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @char_memchr_arg, i32 0, i32 0), i32 123, i64 32) |
| |
| int constexpr_overflow_result() { |
| constexpr int x = 1; |
| // CHECK: alloca i32 |
| constexpr int y = 2; |
| // CHECK: alloca i32 |
| int z; |
| // CHECK: [[Z:%.+]] = alloca i32 |
| |
| __builtin_sadd_overflow(x, y, &z); |
| return z; |
| // CHECK: [[RET_PTR:%.+]] = extractvalue { i32, i1 } %0, 0 |
| // CHECK: store i32 [[RET_PTR]], i32* [[Z]] |
| // CHECK: [[RET_VAL:%.+]] = load i32, i32* [[Z]] |
| // CHECK: ret i32 [[RET_VAL]] |
| } |