[PATCH] Use builtin bool instead of creating new bool types for ComparisonExpr

[Mark Wielaard <mark@klomp.org>]

The TypeCheckExpr creates a new TyTy::BoolType for a
ComparisonExpr. This new BoolType is unknown to TyTyResolveCompile
which causes a crash when trying to compile the inferred new
BoolType. The new "bools_eq.rs" testcase uses several bools which show
this issue. Resolve this by looking up the builtin bool type.
---
 gcc/rust/typecheck/rust-hir-type-check-expr.h  |  2 +-
 gcc/testsuite/rust/compile/torture/bools_eq.rs | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/rust/compile/torture/bools_eq.rs

diff --git a/gcc/rust/typecheck/rust-hir-type-check-expr.h b/gcc/rust/typecheck/rust-hir-type-check-expr.h
index d88cb0b7f1d..9cf64685e00 100644
--- a/gcc/rust/typecheck/rust-hir-type-check-expr.h
+++ b/gcc/rust/typecheck/rust-hir-type-check-expr.h
@@ -631,7 +631,7 @@ public:
       return;
 
     // we expect this to be
-    infered = new TyTy::BoolType (expr.get_mappings ().get_hirid ());
+    context->lookup_builtin ("bool", &infered);
     infered->append_reference (lhs->get_ref ());
     infered->append_reference (rhs->get_ref ());
   }
diff --git a/gcc/testsuite/rust/compile/torture/bools_eq.rs b/gcc/testsuite/rust/compile/torture/bools_eq.rs
new file mode 100644
index 00000000000..965127b5d54
--- /dev/null
+++ b/gcc/testsuite/rust/compile/torture/bools_eq.rs
@@ -0,0 +1,18 @@
+extern "C"
+{
+  fn abort ();
+}
+
+fn beq (a: bool, b: bool) -> bool
+{
+  let bools_eq = a == b;
+  bools_eq
+}
+
+pub fn main ()
+{
+  let a = true;
+  let b = false;
+  let r = beq (a, b);
+  if r { unsafe { abort (); } }
+}
-- 
2.32.0