9a24025661
This is so LLVM isn't forced to load every byte of it. Also sets the alignment of the load. Adds a test for the debug script section.
48 lines
1.4 KiB
Rust
48 lines
1.4 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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pub struct Bytes {
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a: u8,
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b: u8,
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c: u8,
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d: u8,
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}
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// CHECK-LABEL: small_array_alignment
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// The array is stored as i32, but its alignment is lower, go with 1 byte to avoid target
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// dependent alignment
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#[no_mangle]
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pub fn small_array_alignment(x: &mut [i8; 4]) {
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// CHECK: [[VAR:%[0-9]+]] = load {{(\[4 x i8\]\*, )?}}[4 x i8]** %x
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// CHECK: [[VAR2:%[0-9]+]] = bitcast [4 x i8]* [[VAR]] to i32*
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// CHECK: store i32 %{{.*}}, i32* [[VAR2]], align 1
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*x = [0; 4];
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}
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// CHECK-LABEL: small_struct_alignment
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// The struct is stored as i32, but its alignment is lower, go with 1 byte to avoid target
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// dependent alignment
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#[no_mangle]
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pub fn small_struct_alignment(x: &mut Bytes) {
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// CHECK: [[VAR:%[0-9]+]] = load {{(%Bytes\*, )?}}%Bytes** %x
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// CHECK: [[VAR2:%[0-9]+]] = bitcast %Bytes* [[VAR]] to i32*
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// CHECK: store i32 %{{.*}}, i32* [[VAR2]], align 1
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*x = Bytes {
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a: 0,
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b: 0,
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c: 0,
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d: 0,
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};
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}
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