| // Copyright 2017 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // compile-flags: -C no-prepopulate-passes |
| |
| #![crate_type = "lib"] |
| |
| // CHECK-LABEL: @zero_sized_elem |
| #[no_mangle] |
| pub fn zero_sized_elem() { |
| // CHECK-NOT: br label %repeat_loop_header{{.*}} |
| // CHECK-NOT: call void @llvm.memset.p0i8 |
| let x = [(); 4]; |
| drop(&x); |
| } |
| |
| // CHECK-LABEL: @zero_len_array |
| #[no_mangle] |
| pub fn zero_len_array() { |
| // CHECK-NOT: br label %repeat_loop_header{{.*}} |
| // CHECK-NOT: call void @llvm.memset.p0i8 |
| let x = [4; 0]; |
| drop(&x); |
| } |
| |
| // CHECK-LABEL: @byte_array |
| #[no_mangle] |
| pub fn byte_array() { |
| // CHECK: call void @llvm.memset.p0i8.i[[WIDTH:[0-9]+]](i8* {{.*}}, i8 7, i[[WIDTH]] 4 |
| // CHECK-NOT: br label %repeat_loop_header{{.*}} |
| let x = [7u8; 4]; |
| drop(&x); |
| } |
| |
| #[allow(dead_code)] |
| #[derive(Copy, Clone)] |
| enum Init { |
| Loop, |
| Memset, |
| } |
| |
| // CHECK-LABEL: @byte_enum_array |
| #[no_mangle] |
| pub fn byte_enum_array() { |
| // CHECK: call void @llvm.memset.p0i8.i[[WIDTH:[0-9]+]](i8* {{.*}}, i8 {{.*}}, i[[WIDTH]] 4 |
| // CHECK-NOT: br label %repeat_loop_header{{.*}} |
| let x = [Init::Memset; 4]; |
| drop(&x); |
| } |
| |
| // CHECK-LABEL: @zeroed_integer_array |
| #[no_mangle] |
| pub fn zeroed_integer_array() { |
| // CHECK: call void @llvm.memset.p0i8.i[[WIDTH:[0-9]+]](i8* {{.*}}, i8 0, i[[WIDTH]] 16 |
| // CHECK-NOT: br label %repeat_loop_header{{.*}} |
| let x = [0u32; 4]; |
| drop(&x); |
| } |
| |
| // CHECK-LABEL: @nonzero_integer_array |
| #[no_mangle] |
| pub fn nonzero_integer_array() { |
| // CHECK: br label %repeat_loop_header{{.*}} |
| // CHECK-NOT: call void @llvm.memset.p0i8 |
| let x = [0x1a_2b_3c_4d_u32; 4]; |
| drop(&x); |
| } |