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/reader/src/isaspec.rs

@@ -0,0 +1,65 @@
+//! Parsed representation of `set` and `isa` commands.
+//!
+//! A test case file can contain `set` commands that set ISA-independent settings, and it can
+//! contain `isa` commands that select an ISA and applies ISA-specific settings.
+//!
+//! If a test case file contains `isa` commands, the tests will only be run against the specified
+//! ISAs. If the file contains no `isa` commands, the tests will be run against all supported ISAs.
+
+use crate::error::{Location, ParseResult};
+use crate::testcommand::TestOption;
+use cranelift_codegen::isa::TargetIsa;
+use cranelift_codegen::settings::{Configurable, Flags, SetError};
+
+/// The ISA specifications in a `.clif` file.
+pub enum IsaSpec {
+    /// The parsed file does not contain any `isa` commands, but it may contain `set` commands
+    /// which are reflected in the finished `Flags` object.
+    None(Flags),
+
+    /// The parsed file does contains `isa` commands.
+    /// Each `isa` command is used to configure a `TargetIsa` trait object.
+    Some(Vec<Box<TargetIsa>>),
+}
+
+impl IsaSpec {
+    /// If the `IsaSpec` contains exactly 1 `TargetIsa` we return a reference to it
+    pub fn unique_isa(&self) -> Option<&TargetIsa> {
+        if let IsaSpec::Some(ref isa_vec) = *self {
+            if isa_vec.len() == 1 {
+                return Some(&*isa_vec[0]);
+            }
+        }
+        None
+    }
+}
+
+/// Parse an iterator of command line options and apply them to `config`.
+pub fn parse_options<'a, I>(iter: I, config: &mut Configurable, loc: Location) -> ParseResult<()>
+where
+    I: Iterator<Item = &'a str>,
+{
+    for opt in iter.map(TestOption::new) {
+        match opt {
+            TestOption::Flag(name) => match config.enable(name) {
+                Ok(_) => {}
+                Err(SetError::BadName(name)) => return err!(loc, "unknown flag '{}'", name),
+                Err(_) => return err!(loc, "not a boolean flag: '{}'", opt),
+            },
+            TestOption::Value(name, value) => match config.set(name, value) {
+                Ok(_) => {}
+                Err(SetError::BadName(name)) => return err!(loc, "unknown setting '{}'", name),
+                Err(SetError::BadType) => return err!(loc, "invalid setting type: '{}'", opt),
+                Err(SetError::BadValue(expected)) => {
+                    return err!(
+                        loc,
+                        "invalid setting value for '{}', expected {}",
+                        opt,
+                        expected
+                    );
+                }
+            },
+        }
+    }
+    Ok(())
+}