Merge vcode filetest mode into compile.

I hadn't realized before that the filetest backend for `test vcode` is
doing essentially what `compile` is doing, but for new (`MachInst`)
backends: it is just getting a disassembly and running it through
filecheck. There's no reason not to reuse `test compile` for the AArch64
tests as well.

This was motivated by the desire to have "this IR compiles successfully"
tests work on both x86 and AArch64. It seems this should work fine by
adding multiple `target` directives when a test case should be
compile-tested on multiple architectures.

cranelift/filetests/filetests/vcode/aarch64/arithmetic.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f1(i64, i64) -> i64 {

cranelift/filetests/filetests/vcode/aarch64/basic1.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f(i32, i32) -> i32 {

cranelift/filetests/filetests/vcode/aarch64/bitops.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %a(i8) -> i8 {

cranelift/filetests/filetests/vcode/aarch64/call-indirect.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f(i64, i64) -> i64 {

cranelift/filetests/filetests/vcode/aarch64/call.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f(i64) -> i64 {

cranelift/filetests/filetests/vcode/aarch64/condbr.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f(i64, i64) -> b1 {

cranelift/filetests/filetests/vcode/aarch64/condops.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f(i8, i64, i64) -> i64 {

cranelift/filetests/filetests/vcode/aarch64/constants.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f() -> b8 {

cranelift/filetests/filetests/vcode/aarch64/extend-op.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f(i8) -> i64 {

cranelift/filetests/filetests/vcode/aarch64/floating-point.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f1(f32, f32) -> f32 {

cranelift/filetests/filetests/vcode/aarch64/jumptable.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f(i64) -> i64 {

cranelift/filetests/filetests/vcode/aarch64/narrow-arithmetic.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %add8(i8, i8) -> i8 {

cranelift/filetests/filetests/vcode/aarch64/saturating-ops.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %uaddsat64(i64, i64) -> i64 {

cranelift/filetests/filetests/vcode/aarch64/shift-op.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f(i64) -> i64 {

cranelift/filetests/filetests/vcode/aarch64/shift-rotate.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

cranelift/filetests/filetests/vcode/aarch64/stack-limit.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %foo() {

cranelift/filetests/filetests/vcode/aarch64/stack.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %stack_addr_small() -> i64 {

cranelift/filetests/filetests/vcode/aarch64/symbol-value.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f() -> i64 {

cranelift/filetests/filetests/vcode/aarch64/traps.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f() {

cranelift/filetests/filetests/vcode/aarch64/uextend-sextend.clif

@@ -1,4 +1,4 @@
-test vcode
+test compile
 target aarch64
 
 function %f_u_8_64(i8) -> i64 {

cranelift/filetests/src/lib.rs

@@ -57,7 +57,6 @@ mod test_shrink;
 mod test_simple_gvn;
 mod test_simple_preopt;
 mod test_unwind;
-mod test_vcode;
 mod test_verifier;
 
 /// The result of running the test in a file.
@@ -141,7 +140,6 @@ fn new_subtest(parsed: &TestCommand) -> subtest::SubtestResult<Box<dyn subtest::
         "simple-gvn" => test_simple_gvn::subtest(parsed),
         "simple_preopt" => test_simple_preopt::subtest(parsed),
         "unwind" => test_unwind::subtest(parsed),
-        "vcode" => test_vcode::subtest(parsed),
         "verifier" => test_verifier::subtest(parsed),
         _ => Err(format!("unknown test command '{}'", parsed.command)),
     }

cranelift/filetests/src/test_compile.rs

@@ -40,6 +40,11 @@ impl SubTest for TestCompile {
         let isa = context.isa.expect("compile needs an ISA");
         let mut comp_ctx = cranelift_codegen::Context::for_function(func.into_owned());
 
+        if isa.get_mach_backend().is_some() {
+            // With `MachBackend`s, we need to explicitly request dissassembly results.
+            comp_ctx.set_disasm(true);
+        }
+
         let CodeInfo { total_size, .. } = comp_ctx
             .compile(isa)
             .map_err(|e| pretty_error(&comp_ctx.func, context.isa, e))?;
@@ -50,6 +55,7 @@ impl SubTest for TestCompile {
             comp_ctx.func.display(isa)
         );
 
+        if !isa.get_mach_backend().is_some() {
             // Verify that the returned code size matches the emitted bytes.
             let mut sink = SizeSink { offset: 0 };
             binemit::emit_function(
@@ -69,6 +75,16 @@ impl SubTest for TestCompile {
             // Run final code through filecheck.
             let text = comp_ctx.func.display(Some(isa)).to_string();
             run_filecheck(&text, context)
+        } else {
+            let disasm = comp_ctx
+                .mach_compile_result
+                .as_ref()
+                .unwrap()
+                .disasm
+                .as_ref()
+                .unwrap();
+            run_filecheck(&disasm, context)
+        }
     }
 }
 

cranelift/filetests/src/test_vcode.rs

@@ -1,67 +0,0 @@
-use crate::subtest::{run_filecheck, Context, SubTest, SubtestResult};
-use cranelift_codegen::ir::Function;
-use cranelift_codegen::isa::lookup;
-use cranelift_codegen::settings;
-use cranelift_codegen::Context as CodegenContext;
-use cranelift_reader::{TestCommand, TestOption};
-
-use log::info;
-use std::borrow::Cow;
-use std::string::String;
-
-struct TestVCode {
-    arch: String,
-}
-
-pub fn subtest(parsed: &TestCommand) -> SubtestResult<Box<dyn SubTest>> {
-    assert_eq!(parsed.command, "vcode");
-
-    let mut arch = "arm64".to_string();
-    for option in &parsed.options {
-        match option {
-            TestOption::Value(k, v) if k == &"arch" => {
-                arch = v.to_string();
-            }
-            _ => {}
-        }
-    }
-
-    Ok(Box::new(TestVCode { arch }))
-}
-
-impl SubTest for TestVCode {
-    fn name(&self) -> &'static str {
-        "vcode"
-    }
-
-    fn is_mutating(&self) -> bool {
-        true
-    }
-
-    fn needs_isa(&self) -> bool {
-        true
-    }
-
-    fn run(&self, func: Cow<Function>, context: &Context) -> SubtestResult<()> {
-        let triple = context.isa.unwrap().triple().clone();
-        let func = func.into_owned();
-
-        let mut isa = lookup(triple)
-            .map_err(|_| format!("Could not look up backend for arch '{}'", self.arch))?
-            .finish(settings::Flags::new(settings::builder()));
-
-        let mut codectx = CodegenContext::for_function(func);
-        codectx.set_disasm(true);
-
-        codectx
-            .compile(&mut *isa)
-            .map_err(|e| format!("Could not compile with arch '{}': {:?}", self.arch, e))?;
-
-        let result = codectx.mach_compile_result.take().unwrap();
-        let text = result.disasm.unwrap();
-
-        info!("text input to filecheck is:\n{}\n", text);
-
-        run_filecheck(&text, context)
-    }
-}