test: Add a min-llvm-version directive

mk/main.mk

@@ -348,6 +348,7 @@ LLVM_AS_$(1)=$$(CFG_LLVM_INST_DIR_$(1))/bin/llvm-as$$(X_$(1))
 LLC_$(1)=$$(CFG_LLVM_INST_DIR_$(1))/bin/llc$$(X_$(1))
 
 LLVM_ALL_COMPONENTS_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --components)
+LLVM_VERSION_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --version)
 
 endef
 

mk/tests.mk

@@ -649,6 +649,7 @@ CTEST_COMMON_ARGS$(1)-T-$(2)-H-$(3) = \
 	--lldb-python $$(CFG_LLDB_PYTHON) \
         --gdb-version="$(CFG_GDB_VERSION)" \
         --lldb-version="$(CFG_LLDB_VERSION)" \
+        --llvm-version="$$(LLVM_VERSION_$(3))" \
         --android-cross-path=$(CFG_ARM_LINUX_ANDROIDEABI_NDK) \
         --adb-path=$(CFG_ADB) \
         --adb-test-dir=$(CFG_ADB_TEST_DIR) \

src/bootstrap/check.rs

@@ -148,6 +148,9 @@ pub fn compiletest(build: &Build,
     if let Some(ref dir) = build.lldb_python_dir {
         cmd.arg("--lldb-python-dir").arg(dir);
     }
+    let llvm_config = build.llvm_config(target);
+    let llvm_version = output(Command::new(&llvm_config).arg("--version"));
+    cmd.arg("--llvm-version").arg(llvm_version);
 
     cmd.args(&build.flags.args);
 
@@ -158,7 +161,6 @@ pub fn compiletest(build: &Build,
     // Only pass correct values for these flags for the `run-make` suite as it
     // requires that a C++ compiler was configured which isn't always the case.
     if suite == "run-make" {
-        let llvm_config = build.llvm_config(target);
         let llvm_components = output(Command::new(&llvm_config).arg("--components"));
         let llvm_cxxflags = output(Command::new(&llvm_config).arg("--cxxflags"));
         cmd.arg("--cc").arg(build.cc(target))

src/test/run-pass/issue-36023.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// min-llvm-version 3.9
+
 use std::ops::Deref;
 
 fn main() {

src/tools/compiletest/src/common.rs

@@ -152,6 +152,9 @@ pub struct Config {
     // Version of LLDB
     pub lldb_version: Option<String>,
 
+    // Version of LLVM
+    pub llvm_version: Option<String>,
+
     // Path to the android tools
     pub android_cross_path: PathBuf,
 

src/tools/compiletest/src/header.rs

@@ -44,7 +44,9 @@ impl EarlyProps {
                 (config.mode == common::Pretty && parse_name_directive(ln, "ignore-pretty")) ||
                 (config.target != config.host &&
                  parse_name_directive(ln, "ignore-cross-compile")) ||
-                ignore_gdb(config, ln) || ignore_lldb(config, ln);
+                ignore_gdb(config, ln) ||
+                ignore_lldb(config, ln) ||
+                ignore_llvm(config, ln);
 
             props.should_fail = props.should_fail || parse_name_directive(ln, "should-fail");
         });
@@ -115,6 +117,24 @@ impl EarlyProps {
                 false
             }
         }
+
+        fn ignore_llvm(config: &Config, line: &str) -> bool {
+            if let Some(ref actual_version) = config.llvm_version {
+                if line.contains("min-llvm-version") {
+                    let min_version = line.trim()
+                        .split(' ')
+                        .last()
+                        .expect("Malformed llvm version directive");
+                    // Ignore if actual version is smaller the minimum required
+                    // version
+                    &actual_version[..] < min_version
+                } else {
+                    false
+                }
+            } else {
+                false
+            }
+        }
     }
 }
 

src/tools/compiletest/src/main.rs

@@ -99,6 +99,7 @@ pub fn parse_config(args: Vec<String> ) -> Config {
           optopt("", "host", "the host to build for", "HOST"),
           optopt("", "gdb-version", "the version of GDB used", "VERSION STRING"),
           optopt("", "lldb-version", "the version of LLDB used", "VERSION STRING"),
+          optopt("", "llvm-version", "the version of LLVM used", "VERSION STRING"),
           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"),
@@ -170,6 +171,7 @@ pub fn parse_config(args: Vec<String> ) -> Config {
         host: opt_str2(matches.opt_str("host")),
         gdb_version: extract_gdb_version(matches.opt_str("gdb-version")),
         lldb_version: extract_lldb_version(matches.opt_str("lldb-version")),
+        llvm_version: matches.opt_str("llvm-version"),
         android_cross_path: opt_path(matches, "android-cross-path"),
         adb_path: opt_str2(matches.opt_str("adb-path")),
         adb_test_dir: format!("{}/{}",