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| author | bors <bors@rust-lang.org> | 2017-06-02 04:58:09 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2017-06-02 04:58:09 +0000 |
| commit | 668e698bbaacfeacb712512a58db1bd5e78ee371 (patch) | |
| tree | 49704edc575a8b2963bb7d00b63da9b3238b6192 /src/test/codegen | |
| parent | 4ed2edaafe82fb8d44e81e00ca3e4f7659855ba2 (diff) | |
| parent | f83901bb89e4043268ec3bf033b435d56e1ed303 (diff) | |
| download | rust-668e698bbaacfeacb712512a58db1bd5e78ee371.tar.gz rust-668e698bbaacfeacb712512a58db1bd5e78ee371.zip | |
Auto merge of #41418 - hirschenberger:prefetch-intrinsic, r=nagisa
Adding support for the llvm `prefetch` intrinsic Optimize `slice::binary_search` by using prefetching.
Diffstat (limited to 'src/test/codegen')
| -rw-r--r-- | src/test/codegen/prefetch.rs | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/test/codegen/prefetch.rs b/src/test/codegen/prefetch.rs new file mode 100644 index 00000000000..9ca2f01f80d --- /dev/null +++ b/src/test/codegen/prefetch.rs @@ -0,0 +1,75 @@ +// 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"] +#![feature(core_intrinsics)] + +use std::intrinsics::{prefetch_read_data, prefetch_write_data, + prefetch_read_instruction, prefetch_write_instruction}; + +#[no_mangle] +pub fn check_prefetch_read_data(data: &[i8]) { + unsafe { + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 0, i32 0, i32 1) + prefetch_read_data(data.as_ptr(), 0); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 0, i32 1, i32 1) + prefetch_read_data(data.as_ptr(), 1); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 0, i32 2, i32 1) + prefetch_read_data(data.as_ptr(), 2); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 0, i32 3, i32 1) + prefetch_read_data(data.as_ptr(), 3); + } +} + +#[no_mangle] +pub fn check_prefetch_write_data(data: &[i8]) { + unsafe { + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 1, i32 0, i32 1) + prefetch_write_data(data.as_ptr(), 0); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 1, i32 1, i32 1) + prefetch_write_data(data.as_ptr(), 1); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 1, i32 2, i32 1) + prefetch_write_data(data.as_ptr(), 2); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 1, i32 3, i32 1) + prefetch_write_data(data.as_ptr(), 3); + } +} + +#[no_mangle] +pub fn check_prefetch_read_instruction(data: &[i8]) { + unsafe { + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 0, i32 0, i32 0) + prefetch_read_instruction(data.as_ptr(), 0); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 0, i32 1, i32 0) + prefetch_read_instruction(data.as_ptr(), 1); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 0, i32 2, i32 0) + prefetch_read_instruction(data.as_ptr(), 2); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 0, i32 3, i32 0) + prefetch_read_instruction(data.as_ptr(), 3); + } +} + +#[no_mangle] +pub fn check_prefetch_write_instruction(data: &[i8]) { + unsafe { + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 1, i32 0, i32 0) + prefetch_write_instruction(data.as_ptr(), 0); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 1, i32 1, i32 0) + prefetch_write_instruction(data.as_ptr(), 1); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 1, i32 2, i32 0) + prefetch_write_instruction(data.as_ptr(), 2); + // CHECK: call void @llvm.prefetch(i8* %{{.*}}, i32 1, i32 3, i32 0) + prefetch_write_instruction(data.as_ptr(), 3); + } +} + + |