Add a no-system-llvm compilecheck header

Author: nagisa

src/bootstrap/check.rs

@@ -245,6 +245,9 @@ pub fn compiletest(build: &Build,
     let llvm_config = build.llvm_config(target);
     let llvm_version = output(Command::new(&llvm_config).arg("--version"));
     cmd.arg("--llvm-version").arg(llvm_version);
+    if !build.is_rust_llvm(target) {
+        cmd.arg("--system-llvm");
+    }
 
     cmd.args(&build.flags.cmd.test_args());
 

src/llvm

@@ -7,17 +7,11 @@
 // <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.
+//
+// no-system-llvm
+// compile-flags: -O
 #![crate_type="lib"]
 
-#[no_mangle]
-pub fn alloc_zeroed_test(size: u8) {
-    // CHECK-LABEL: @alloc_zeroed_test
-    // CHECK-NEXT: start:
-    // CHECK-NEXT: ret void
-    let x = vec![0u8; size as usize];
-    drop(x);
-}
-
 #[no_mangle]
 pub fn alloc_test(data: u32) {
     // CHECK-LABEL: @alloc_test

src/test/codegen/alloc-optimisation.rs

@@ -166,6 +166,9 @@ pub struct Config {
     // Version of LLVM
     pub llvm_version: Option<String>,
 
+    // Is LLVM a system LLVM
+    pub system_llvm: bool,
+
     // Path to the android tools
     pub android_cross_path: PathBuf,
 

src/tools/compiletest/src/common.rs

@@ -166,6 +166,9 @@ impl EarlyProps {
         }
 
         fn ignore_llvm(config: &Config, line: &str) -> bool {
+            if config.system_llvm && line.starts_with("no-system-llvm") {
+                    return true;
+            }
             if let Some(ref actual_version) = config.llvm_version {
                 if line.starts_with("min-llvm-version") {
                     let min_version = line.trim_right()

src/tools/compiletest/src/header.rs

@@ -97,6 +97,7 @@ pub fn parse_config(args: Vec<String> ) -> Config {
           optopt("", "gdb", "path to GDB to use for GDB debuginfo tests", "PATH"),
           optopt("", "lldb-version", "the version of LLDB used", "VERSION STRING"),
           optopt("", "llvm-version", "the version of LLVM used", "VERSION STRING"),
+          optflag("", "system-llvm", "is LLVM the system LLVM"),
           optopt("", "android-cross-path", "Android NDK standalone path", "PATH"),
           optopt("", "adb-path", "path to the android debugger", "PATH"),
           optopt("", "adb-test-dir", "path to tests for the android debugger", "PATH"),
@@ -183,6 +184,7 @@ pub fn parse_config(args: Vec<String> ) -> Config {
         gdb_native_rust: gdb_native_rust,
         lldb_version: extract_lldb_version(matches.opt_str("lldb-version")),
         llvm_version: matches.opt_str("llvm-version"),
+        system_llvm: matches.opt_present("system-llvm"),
         android_cross_path: opt_path(matches, "android-cross-path"),
         adb_path: opt_str2(matches.opt_str("adb-path")),
         adb_test_dir: opt_str2(matches.opt_str("adb-test-dir")),