Initial public commit of regalloc2.

fuzz/fuzz_targets/ssagen.rs

@@ -0,0 +1,35 @@
+#![no_main]
+use libfuzzer_sys::arbitrary::{Arbitrary, Result, Unstructured};
+use libfuzzer_sys::fuzz_target;
+
+use regalloc2::cfg::CFGInfo;
+use regalloc2::fuzzing::func::{Func, Options};
+use regalloc2::ssa::validate_ssa;
+
+#[derive(Debug)]
+struct TestCase {
+    f: Func,
+}
+
+impl Arbitrary for TestCase {
+    fn arbitrary(u: &mut Unstructured) -> Result<Self> {
+        Ok(TestCase {
+            f: Func::arbitrary_with_options(
+                u,
+                &Options {
+                    reused_inputs: true,
+                    fixed_regs: true,
+                    clobbers: true,
+                    control_flow: true,
+                    reducible: false,
+                    always_local_uses: false,
+                },
+            )?,
+        })
+    }
+}
+
+fuzz_target!(|t: TestCase| {
+    let cfginfo = CFGInfo::new(&t.f);
+    validate_ssa(&t.f, &cfginfo).expect("invalid SSA");
+});