| // RUN: %clang_cc1 -triple x86_64-unknown-unknown -S -emit-llvm -o - %s | FileCheck %s |
| // |
| // Verifies that clang doesn't mark an inline builtin definition as `nobuiltin` |
| // if the builtin isn't emittable. |
| |
| typedef unsigned long size_t; |
| |
| // always_inline is used so clang will emit this body. Otherwise, we need >= |
| // -O1. |
| #define AVAILABLE_EXTERNALLY extern inline __attribute__((always_inline)) \ |
| __attribute__((gnu_inline)) |
| |
| AVAILABLE_EXTERNALLY void *memcpy(void *a, const void *b, size_t c) { |
| return __builtin_memcpy(a, b, c); |
| } |
| |
| // CHECK-LABEL: define void @foo |
| void foo(void *a, const void *b, size_t c) { |
| // Clang will always _emit_ this as memcpy. LLVM turns it into @llvm.memcpy |
| // later on if optimizations are enabled. |
| // CHECK: call i8* @memcpy |
| memcpy(a, b, c); |
| } |
| |
| // CHECK-NOT: nobuiltin |
