1 /// Check that the new alignment set by the alignment builtins is propagated 2 /// to e.g. llvm.memcpy calls. 3 // RUN: %clang_cc1 -no-opaque-pointers -triple=x86_64-unknown-unknown %s -emit-llvm -O1 -o - | FileCheck %s 4 5 // CHECK-LABEL: define {{[^@]+}}@align_up 6 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 64 dereferenceable(16) {{%.+}}, i8* noundef nonnull align 1 dereferenceable(16) {{%.+}}, i64 16, i1 false) 7 // CHECK-NEXT: ret void 8 // 9 void align_up(void* data, int* ptr) { 10 // The call to llvm.memcpy should have an "align 64" on the first argument 11 __builtin_memcpy(__builtin_align_up(ptr, 64), data, 16); 12 } 13