Rename subtest's Result to SubtestResult.

This avoids naming confusion with the standard `Result`, which is
included in the prelude.

lib/filetests/src/lib.rs

@@ -79,7 +79,7 @@ pub fn run(verbose: bool, files: &[String]) -> TestResult {
 ///
 /// This function knows how to create all of the possible `test <foo>` commands that can appear in
 /// a `.cton` test file.
-fn new_subtest(parsed: &TestCommand) -> subtest::Result<Box<subtest::SubTest>> {
+fn new_subtest(parsed: &TestCommand) -> subtest::SubtestResult<Box<subtest::SubTest>> {
     match parsed.command {
         "binemit" => test_binemit::subtest(parsed),
         "cat" => test_cat::subtest(parsed),

lib/filetests/src/runone.rs

@@ -13,7 +13,7 @@ use std::fs;
 use std::io::{self, Read};
 use std::path::Path;
 use std::time;
-use subtest::{Context, Result, SubTest};
+use subtest::{Context, SubTest, SubtestResult};
 use {new_subtest, TestResult};
 
 /// Read an entire file into a string.
@@ -42,7 +42,7 @@ pub fn run(path: &Path) -> TestResult {
         .commands
         .iter()
         .map(new_subtest)
-        .collect::<Result<Vec<_>>>()?;
+        .collect::<SubtestResult<Vec<_>>>()?;
 
     // Flags to use for those tests that don't need an ISA.
     // This is the cumulative effect of all the `set` commands in the file.
@@ -90,7 +90,7 @@ fn test_tuples<'a>(
     tests: &'a [Box<SubTest>],
     isa_spec: &'a IsaSpec,
     no_isa_flags: &'a Flags,
-) -> Result<Vec<(&'a SubTest, &'a Flags, Option<&'a TargetIsa>)>> {
+) -> SubtestResult<Vec<(&'a SubTest, &'a Flags, Option<&'a TargetIsa>)>> {
     let mut out = Vec::new();
     for test in tests {
         if test.needs_isa() {
@@ -119,7 +119,7 @@ fn run_one_test<'a>(
     tuple: (&'a SubTest, &'a Flags, Option<&'a TargetIsa>),
     func: Cow<Function>,
     context: &mut Context<'a>,
-) -> Result<()> {
+) -> SubtestResult<()> {
     let (test, flags, isa) = tuple;
     let name = format!("{}({})", test.name(), func.name);
     dbg!("Test: {} {}", name, isa.map_or("-", TargetIsa::name));

lib/filetests/src/subtest.rs

@@ -6,9 +6,8 @@ use cretonne_codegen::settings::{Flags, FlagsOrIsa};
 use cretonne_reader::{Comment, Details};
 use filecheck::{Checker, CheckerBuilder, NO_VARIABLES};
 use std::borrow::Cow;
-use std::result;
 
-pub type Result<T> = result::Result<T, String>;
+pub type SubtestResult<T> = Result<T, String>;
 
 /// Context for running a test on a single function.
 pub struct Context<'a> {
@@ -64,11 +63,11 @@ pub trait SubTest {
     }
 
     /// Run this test on `func`.
-    fn run(&self, func: Cow<Function>, context: &Context) -> Result<()>;
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()>;
 }
 
 /// Run filecheck on `text`, using directives extracted from `context`.
-pub fn run_filecheck(text: &str, context: &Context) -> Result<()> {
+pub fn run_filecheck(text: &str, context: &Context) -> SubtestResult<()> {
     let checker = build_filechecker(context)?;
     if checker
         .check(text, NO_VARIABLES)
@@ -85,7 +84,7 @@ pub fn run_filecheck(text: &str, context: &Context) -> Result<()> {
 }
 
 /// Build a filechecker using the directives in the file preamble and the function's comments.
-pub fn build_filechecker(context: &Context) -> Result<Checker> {
+pub fn build_filechecker(context: &Context) -> SubtestResult<Checker> {
     let mut builder = CheckerBuilder::new();
     // Preamble comments apply to all functions.
     for comment in context.preamble_comments {

lib/filetests/src/test_binemit.rs

@@ -15,11 +15,11 @@ use match_directive::match_directive;
 use std::borrow::Cow;
 use std::collections::HashMap;
 use std::fmt::Write;
-use subtest::{Context, Result, SubTest};
+use subtest::{Context, SubTest, SubtestResult};
 
 struct TestBinEmit;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
     assert_eq!(parsed.command, "binemit");
     if !parsed.options.is_empty() {
         Err(format!("No options allowed on {}", parsed))
@@ -108,7 +108,7 @@ impl SubTest for TestBinEmit {
         true
     }
 
-    fn run(&self, func: Cow<ir::Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<ir::Function>, context: &Context) -> SubtestResult<()> {
         let isa = context.isa.expect("binemit needs an ISA");
         let encinfo = isa.encoding_info();
         // TODO: Run a verifier pass over the code first to detect any bad encodings or missing/bad

lib/filetests/src/test_cat.rs

@@ -3,7 +3,7 @@
 use cretonne_codegen::ir::Function;
 use cretonne_reader::TestCommand;
 use std::borrow::Cow;
-use subtest::{self, Context, Result as STResult, SubTest};
+use subtest::{self, Context, SubTest, SubtestResult as STResult};
 
 /// Object implementing the `test cat` sub-test.
 ///

lib/filetests/src/test_compile.rs

@@ -7,11 +7,11 @@ use cretonne_codegen::print_errors::pretty_error;
 use cretonne_codegen::{binemit, ir};
 use cretonne_reader::TestCommand;
 use std::borrow::Cow;
-use subtest::{run_filecheck, Context, Result, SubTest};
+use subtest::{run_filecheck, Context, SubTest, SubtestResult};
 
 struct TestCompile;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
     assert_eq!(parsed.command, "compile");
     if !parsed.options.is_empty() {
         Err(format!("No options allowed on {}", parsed))
@@ -33,7 +33,7 @@ impl SubTest for TestCompile {
         true
     }
 
-    fn run(&self, func: Cow<ir::Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<ir::Function>, context: &Context) -> SubtestResult<()> {
         let isa = context.isa.expect("compile needs an ISA");
         let mut comp_ctx = cretonne_codegen::Context::for_function(func.into_owned());
 

lib/filetests/src/test_dce.rs

@@ -10,11 +10,11 @@ use cretonne_codegen::ir::Function;
 use cretonne_codegen::print_errors::pretty_error;
 use cretonne_reader::TestCommand;
 use std::borrow::Cow;
-use subtest::{run_filecheck, Context, Result, SubTest};
+use subtest::{run_filecheck, Context, SubTest, SubtestResult};
 
 struct TestDCE;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
     assert_eq!(parsed.command, "dce");
     if !parsed.options.is_empty() {
         Err(format!("No options allowed on {}", parsed))
@@ -32,7 +32,7 @@ impl SubTest for TestDCE {
         true
     }
 
-    fn run(&self, func: Cow<Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
         let mut comp_ctx = cretonne_codegen::Context::for_function(func.into_owned());
 
         comp_ctx.flowgraph();

lib/filetests/src/test_domtree.rs

@@ -21,12 +21,11 @@ use match_directive::match_directive;
 use std::borrow::{Borrow, Cow};
 use std::collections::HashMap;
 use std::fmt::{self, Write};
-use std::result;
-use subtest::{run_filecheck, Context, Result, SubTest};
+use subtest::{run_filecheck, Context, SubTest, SubtestResult};
 
 struct TestDomtree;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
     assert_eq!(parsed.command, "domtree");
     if !parsed.options.is_empty() {
         Err(format!("No options allowed on {}", parsed))
@@ -41,7 +40,7 @@ impl SubTest for TestDomtree {
     }
 
     // Extract our own dominator tree from
-    fn run(&self, func: Cow<Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
         let func = func.borrow();
         let cfg = ControlFlowGraph::with_function(func);
         let domtree = DominatorTree::with_function(func, &cfg);
@@ -114,7 +113,7 @@ impl SubTest for TestDomtree {
 }
 
 // Generate some output for filecheck testing
-fn filecheck_text(func: &Function, domtree: &DominatorTree) -> result::Result<String, fmt::Error> {
+fn filecheck_text(func: &Function, domtree: &DominatorTree) -> Result<String, fmt::Error> {
     let mut s = String::new();
 
     write!(s, "cfg_postorder:")?;

lib/filetests/src/test_legalizer.rs

@@ -8,11 +8,11 @@ use cretonne_codegen::ir::Function;
 use cretonne_codegen::print_errors::pretty_error;
 use cretonne_reader::TestCommand;
 use std::borrow::Cow;
-use subtest::{run_filecheck, Context, Result, SubTest};
+use subtest::{run_filecheck, Context, SubTest, SubtestResult};
 
 struct TestLegalizer;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
     assert_eq!(parsed.command, "legalizer");
     if !parsed.options.is_empty() {
         Err(format!("No options allowed on {}", parsed))
@@ -34,7 +34,7 @@ impl SubTest for TestLegalizer {
         true
     }
 
-    fn run(&self, func: Cow<Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
         let mut comp_ctx = cretonne_codegen::Context::for_function(func.into_owned());
         let isa = context.isa.expect("legalizer needs an ISA");
 

lib/filetests/src/test_licm.rs

@@ -10,11 +10,11 @@ use cretonne_codegen::ir::Function;
 use cretonne_codegen::print_errors::pretty_error;
 use cretonne_reader::TestCommand;
 use std::borrow::Cow;
-use subtest::{run_filecheck, Context, Result, SubTest};
+use subtest::{run_filecheck, Context, SubTest, SubtestResult};
 
 struct TestLICM;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
     assert_eq!(parsed.command, "licm");
     if !parsed.options.is_empty() {
         Err(format!("No options allowed on {}", parsed))
@@ -32,7 +32,7 @@ impl SubTest for TestLICM {
         true
     }
 
-    fn run(&self, func: Cow<Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
         let mut comp_ctx = cretonne_codegen::Context::for_function(func.into_owned());
 
         comp_ctx.flowgraph();

lib/filetests/src/test_postopt.rs

@@ -7,11 +7,11 @@ use cretonne_codegen::ir::Function;
 use cretonne_codegen::print_errors::pretty_error;
 use cretonne_reader::TestCommand;
 use std::borrow::Cow;
-use subtest::{run_filecheck, Context, Result, SubTest};
+use subtest::{run_filecheck, Context, SubTest, SubtestResult};
 
 struct TestPostopt;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
     assert_eq!(parsed.command, "postopt");
     if !parsed.options.is_empty() {
         Err(format!("No options allowed on {}", parsed))
@@ -29,7 +29,7 @@ impl SubTest for TestPostopt {
         true
     }
 
-    fn run(&self, func: Cow<Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
         let mut comp_ctx = cretonne_codegen::Context::for_function(func.into_owned());
         let isa = context.isa.expect("postopt needs an ISA");
 

lib/filetests/src/test_preopt.rs

@@ -7,11 +7,11 @@ use cretonne_codegen::ir::Function;
 use cretonne_codegen::print_errors::pretty_error;
 use cretonne_reader::TestCommand;
 use std::borrow::Cow;
-use subtest::{run_filecheck, Context, Result, SubTest};
+use subtest::{run_filecheck, Context, SubTest, SubtestResult};
 
 struct TestPreopt;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
     assert_eq!(parsed.command, "preopt");
     if !parsed.options.is_empty() {
         Err(format!("No options allowed on {}", parsed))
@@ -29,7 +29,7 @@ impl SubTest for TestPreopt {
         true
     }
 
-    fn run(&self, func: Cow<Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
         let mut comp_ctx = cretonne_codegen::Context::for_function(func.into_owned());
         let isa = context.isa.expect("preopt needs an ISA");
 

lib/filetests/src/test_print_cfg.rs

@@ -8,7 +8,7 @@ use std::borrow::Cow;
 use cretonne_codegen::cfg_printer::CFGPrinter;
 use cretonne_codegen::ir::Function;
 use cretonne_reader::TestCommand;
-use subtest::{self, Context, Result as STResult, SubTest};
+use subtest::{self, Context, SubTest, SubtestResult as STResult};
 
 /// Object implementing the `test print-cfg` sub-test.
 struct TestPrintCfg;

lib/filetests/src/test_regalloc.rs

@@ -10,11 +10,11 @@ use cretonne_codegen::ir::Function;
 use cretonne_codegen::print_errors::pretty_error;
 use cretonne_reader::TestCommand;
 use std::borrow::Cow;
-use subtest::{run_filecheck, Context, Result, SubTest};
+use subtest::{run_filecheck, Context, SubTest, SubtestResult};
 
 struct TestRegalloc;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
     assert_eq!(parsed.command, "regalloc");
     if !parsed.options.is_empty() {
         Err(format!("No options allowed on {}", parsed))
@@ -36,7 +36,7 @@ impl SubTest for TestRegalloc {
         true
     }
 
-    fn run(&self, func: Cow<Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
         let isa = context.isa.expect("register allocator needs an ISA");
         let mut comp_ctx = cretonne_codegen::Context::for_function(func.into_owned());
 

lib/filetests/src/test_simple_gvn.rs

@@ -10,11 +10,11 @@ use cretonne_codegen::ir::Function;
 use cretonne_codegen::print_errors::pretty_error;
 use cretonne_reader::TestCommand;
 use std::borrow::Cow;
-use subtest::{run_filecheck, Context, Result, SubTest};
+use subtest::{run_filecheck, Context, SubTest, SubtestResult};
 
 struct TestSimpleGVN;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<SubTest>> {
     assert_eq!(parsed.command, "simple-gvn");
     if !parsed.options.is_empty() {
         Err(format!("No options allowed on {}", parsed))
@@ -32,7 +32,7 @@ impl SubTest for TestSimpleGVN {
         true
     }
 
-    fn run(&self, func: Cow<Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
         let mut comp_ctx = cretonne_codegen::Context::for_function(func.into_owned());
 
         comp_ctx.flowgraph();

lib/filetests/src/test_verifier.rs

@@ -14,11 +14,11 @@ use cretonne_codegen::verify_function;
 use cretonne_reader::TestCommand;
 use match_directive::match_directive;
 use std::borrow::{Borrow, Cow};
-use subtest::{Context, Result, SubTest};
+use subtest::{Context, SubTest, SubtestResult};
 
 struct TestVerifier;
 
-pub fn subtest(parsed: &TestCommand) -> Result<Box<SubTest>> {
+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))
@@ -37,7 +37,7 @@ impl SubTest for TestVerifier {
         false
     }
 
-    fn run(&self, func: Cow<Function>, context: &Context) -> Result<()> {
+    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
         let func = func.borrow();
 
         // Scan source annotations for "error:" directives.