[COMMITTED 106/146] gccrs: Allow float type to be casted as integer type

[arthur . cohen]

From: Nobel <nobel2...@gmail.com>

gccrs now should be able to cast float types as numeric.

gcc/rust/ChangeLog:

        * typecheck/rust-casts.cc (TypeCastRules::cast_rules): Add rule.

gcc/testsuite/ChangeLog:

        * rust/compile/cast_float_as_integer.rs: New test.

Signed-off-by: Nobel Singh <nobel2...@gmail.com>
---
 gcc/rust/typecheck/rust-casts.cc                    |  6 ++++++
 gcc/testsuite/rust/compile/cast_float_as_integer.rs | 10 ++++++++++
 2 files changed, 16 insertions(+)
 create mode 100644 gcc/testsuite/rust/compile/cast_float_as_integer.rs

diff --git a/gcc/rust/typecheck/rust-casts.cc b/gcc/rust/typecheck/rust-casts.cc
index 694cbaa5db6..90bdef1fd3c 100644
--- a/gcc/rust/typecheck/rust-casts.cc
+++ b/gcc/rust/typecheck/rust-casts.cc
@@ -235,6 +235,12 @@ TypeCastRules::cast_rules ()
     case TyTy::TypeKind::FLOAT:
       switch (to.get_ty ()->get_kind ())
        {
+       case TyTy::TypeKind::USIZE:
+       case TyTy::TypeKind::ISIZE:
+       case TyTy::TypeKind::UINT:
+       case TyTy::TypeKind::INT:
+         return TypeCoercionRules::CoercionResult{{}, to.get_ty ()->clone ()};
+
        case TyTy::TypeKind::FLOAT:
          return TypeCoercionRules::CoercionResult{{}, to.get_ty ()->clone ()};
 
diff --git a/gcc/testsuite/rust/compile/cast_float_as_integer.rs 
b/gcc/testsuite/rust/compile/cast_float_as_integer.rs
new file mode 100644
index 00000000000..e6b86db8a66
--- /dev/null
+++ b/gcc/testsuite/rust/compile/cast_float_as_integer.rs
@@ -0,0 +1,10 @@
+// { dg-options "-w" }
+fn main(){
+    let foo:f64 = 13.37;
+    let _ = foo as i64;
+    let _ = foo as u64;
+    let _ = foo as isize;
+    let _ = foo as usize;
+    let _ = foo as i8;
+    let _ = foo as u8;
+}
-- 
2.45.2