moved crates in lib/ to src/, renamed crates, modified some files' text (#660)

moved crates in lib/ to src/, renamed crates, modified some files' text (#660)

cranelift/filetests/src/test_verifier.rs

@@ -0,0 +1,94 @@
+//! Test command for checking the IR verifier.
+//!
+//! The `test verifier` test command looks for annotations on instructions like this:
+//!
+//! ```clif
+//!     jump ebb3 ; error: jump to non-existent EBB
+//! ```
+//!
+//! This annotation means that the verifier is expected to given an error for the jump instruction
+//! containing the substring "jump to non-existent EBB".
+
+use crate::match_directive::match_directive;
+use crate::subtest::{Context, SubTest, SubtestResult};
+use cranelift_codegen::ir::Function;
+use cranelift_codegen::verify_function;
+use cranelift_reader::TestCommand;
+use std::borrow::{Borrow, Cow};
+use std::fmt::Write;
+
+struct TestVerifier;
+
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
+    assert_eq!(parsed.command, "verifier");
+    if !parsed.options.is_empty() {
+        Err(format!("No options allowed on {}", parsed))
+    } else {
+        Ok(Box::new(TestVerifier))
+    }
+}
+
+impl SubTest for TestVerifier {
+    fn name(&self) -> &'static str {
+        "verifier"
+    }
+
+    fn needs_verifier(&self) -> bool {
+        // Running the verifier before this test would defeat its purpose.
+        false
+    }
+
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
+        let func = func.borrow();
+
+        // Scan source annotations for "error:" directives.
+        let mut expected = Vec::new();
+
+        for comment in &context.details.comments {
+            if let Some(tail) = match_directive(comment.text, "error:") {
+                expected.push((comment.entity, tail));
+            }
+        }
+
+        match verify_function(func, context.flags_or_isa()) {
+            Ok(()) if expected.is_empty() => Ok(()),
+            Ok(()) => Err(format!("passed, but expected errors: {:?}", expected)),
+
+            Err(ref errors) if expected.is_empty() => {
+                Err(format!("expected no error, but got:\n{}", errors))
+            }
+
+            Err(errors) => {
+                let mut errors = errors.0;
+                let mut msg = String::new();
+
+                // For each expected error, find a suitable match.
+                for expect in expected {
+                    let pos = errors
+                        .iter()
+                        .position(|err| err.location == expect.0 && err.message.contains(expect.1));
+
+                    match pos {
+                        None => {
+                            writeln!(msg, "  expected error {}: {}", expect.0, expect.1).unwrap();
+                        }
+                        Some(pos) => {
+                            errors.swap_remove(pos);
+                        }
+                    }
+                }
+
+                // Report remaining errors.
+                for err in errors {
+                    writeln!(msg, "unexpected error {}", err).unwrap();
+                }
+
+                if msg.is_empty() {
+                    Ok(())
+                } else {
+                    Err(msg)
+                }
+            }
+        }
+    }
+}