bda083fa70
A DST value and a fat pointer to it have the same representation, all we have to do is to adjust the type of the datum holding the pointer.
30 lines
1.1 KiB
Rust
30 lines
1.1 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// compile-flags: -C no-prepopulate-passes
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#![crate_type = "lib"]
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// Hack to get the correct size for the length part in slices
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// CHECK: @helper([[USIZE:i[0-9]+]])
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#[no_mangle]
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fn helper(_: usize) {
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}
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// CHECK-LABEL: @ref_dst
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#[no_mangle]
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pub fn ref_dst(s: &[u8]) {
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// We used to generate an extra alloca and memcpy to ref the dst, so check that we copy
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// directly to the alloca for "x"
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// CHECK: [[SRC:%[0-9]+]] = bitcast { i8*, [[USIZE]] }* %s to i8*
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// CHECK: [[DST:%[0-9]+]] = bitcast { i8*, [[USIZE]] }* %x to i8*
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// CHECK: call void @llvm.memcpy.{{.*}}(i8* [[DST]], i8* [[SRC]],
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let x = &*s;
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}
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