From 06dd27b4ca36b00da50094dc54a142d0f865feab Mon Sep 17 00:00:00 2001 From: Nobel Date: Mon, 23 Dec 2024 04:04:44 +0545 Subject: [PATCH] add ptr to int and int to ptr type cast rules Added rules to allow type casting pointer as integer types (u*,i*) and integer types to be casted as pointer. gcc/rust/ChangeLog: * typecheck/rust-casts.cc (TypeCastRules::cast_rules): Add rule. gcc/testsuite/ChangeLog: * rust/compile/ptr_int_cast.rs: New test. Signed-off-by: Nobel Singh --- gcc/rust/typecheck/rust-casts.cc | 27 ++++++++++++++++++++-- gcc/testsuite/rust/compile/ptr_int_cast.rs | 18 +++++++++++++++ 2 files changed, 43 insertions(+), 2 deletions(-) create mode 100644 gcc/testsuite/rust/compile/ptr_int_cast.rs diff --git a/gcc/rust/typecheck/rust-casts.cc b/gcc/rust/typecheck/rust-casts.cc index fb7951032491..c1996ca5a083 100644 --- a/gcc/rust/typecheck/rust-casts.cc +++ b/gcc/rust/typecheck/rust-casts.cc @@ -210,6 +210,16 @@ TypeCastRules::cast_rules () } break; + case TyTy::TypeKind::POINTER: { + // char can't be casted as a ptr + bool from_char + = from.get_ty ()->get_kind () == TyTy::TypeKind::CHAR; + if (!from_char) + return TypeCoercionRules::CoercionResult{{}, + to.get_ty ()->clone ()}; + } + break; + case TyTy::TypeKind::INFER: case TyTy::TypeKind::USIZE: case TyTy::TypeKind::ISIZE: @@ -254,12 +264,25 @@ TypeCastRules::cast_rules () case TyTy::TypeKind::POINTER: switch (to.get_ty ()->get_kind ()) { + case TyTy::TypeKind::USIZE: + case TyTy::TypeKind::ISIZE: + case TyTy::TypeKind::UINT: + case TyTy::TypeKind::INT: { + // refs should not cast to numeric type + bool from_ptr + = from.get_ty ()->get_kind () == TyTy::TypeKind::POINTER; + if (from_ptr) + { + return TypeCoercionRules::CoercionResult{ + {}, to.get_ty ()->clone ()}; + } + } + break; + case TyTy::TypeKind::REF: case TyTy::TypeKind::POINTER: return check_ptr_ptr_cast (); - // FIXME can you cast a pointer to a integral type? - default: return TypeCoercionRules::CoercionResult::get_error (); } diff --git a/gcc/testsuite/rust/compile/ptr_int_cast.rs b/gcc/testsuite/rust/compile/ptr_int_cast.rs new file mode 100644 index 000000000000..3a2a5d563d60 --- /dev/null +++ b/gcc/testsuite/rust/compile/ptr_int_cast.rs @@ -0,0 +1,18 @@ +fn main(){ + let foo = 1337; + let bar_ptr = &foo as *const i32; + + let bar_ptr_usize = bar_ptr as usize; + let bar_ptr_isize = bar_ptr as isize; + let bar_ptr_u64 = bar_ptr as u64; + let bar_ptr_i64 = bar_ptr as i64; + let bar_ptr_i8 = bar_ptr as i8; + let bar_ptr_u8 = bar_ptr as u8; + + let _ = bar_ptr_usize as *const i32; + let _ = bar_ptr_isize as *const i32; + let _ = bar_ptr_u64 as *const i32; + let _ = bar_ptr_i64 as *const i32; + let _ = bar_ptr_i8 as *const i32; + let _ = bar_ptr_u8 as *const i32; +}