New upstream version 1.63.0+dfsg1

[rustc.git] / compiler / rustc_codegen_ssa / src / mir / rvalue.rs

diff --git a/compiler/rustc_codegen_ssa/src/mir/rvalue.rs b/compiler/rustc_codegen_ssa/src/mir/rvalue.rs
index fd29c9e281b920dba741834c28a1703753631785..81c1897694ce61773aef5d0fc3344bf5aa825b6d 100644 (file)
--- a/compiler/rustc_codegen_ssa/src/mir/rvalue.rs
+++ b/compiler/rustc_codegen_ssa/src/mir/rvalue.rs
@@ -181,6 +181,13 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                 let cast = bx.cx().layout_of(self.monomorphize(mir_cast_ty));
 
                 let val = match *kind {
+                    mir::CastKind::PointerExposeAddress => {
+                        assert!(bx.cx().is_backend_immediate(cast));
+                        let llptr = operand.immediate();
+                        let llcast_ty = bx.cx().immediate_backend_type(cast);
+                        let lladdr = bx.ptrtoint(llptr, llcast_ty);
+                        OperandValue::Immediate(lladdr)
+                    }
                     mir::CastKind::Pointer(PointerCast::ReifyFnPointer) => {
                         match *operand.layout.ty.kind() {
                             ty::FnDef(def_id, substs) => {
@@ -262,7 +269,11 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                     mir::CastKind::Pointer(
                         PointerCast::MutToConstPointer | PointerCast::ArrayToPointer,
                     )
-                    | mir::CastKind::Misc => {
+                    | mir::CastKind::Misc
+                    // Since int2ptr can have arbitrary integer types as input (so we have to do
+                    // sign extension and all that), it is currently best handled in the same code
+                    // path as the other integer-to-X casts.
+                    | mir::CastKind::PointerFromExposedAddress => {
                         assert!(bx.cx().is_backend_immediate(cast));
                         let ll_t_out = bx.cx().immediate_backend_type(cast);
                         if operand.layout.abi.is_uninhabited() {
@@ -362,9 +373,6 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                             (CastTy::Ptr(_) | CastTy::FnPtr, CastTy::Ptr(_)) => {
                                 bx.pointercast(llval, ll_t_out)
                             }
-                            (CastTy::Ptr(_) | CastTy::FnPtr, CastTy::Int(_)) => {
-                                bx.ptrtoint(llval, ll_t_out)
-                            }
                             (CastTy::Int(_), CastTy::Ptr(_)) => {
                                 let usize_llval = bx.intcast(llval, bx.cx().type_isize(), signed);
                                 bx.inttoptr(usize_llval, ll_t_out)