u128 truncation and sign extension are not just interpreter related

2020-11-04 13:41:58 +00:00 · 2020-11-04 13:41:58 +00:00 · abacaf2aef
commit abacaf2aef
parent e67c768110
18 changed files with 73 additions and 89 deletions
--- a/compiler/rustc_codegen_cranelift/src/base.rs
+++ b/compiler/rustc_codegen_cranelift/src/base.rs
@ -585,10 +585,7 @@ fn codegen_stmt<'tcx>(
                                    .discriminant_for_variant(fx.tcx, *index)
                                    .unwrap();
                                let discr = if discr.ty.is_signed() {
-                                    rustc_middle::mir::interpret::sign_extend(
-                                        discr.val,
-                                        fx.layout_of(discr.ty).size,
-                                    )
+                                    fx.layout_of(discr.ty).size.sign_extend(discr.val)
                                } else {
                                    discr.val
                                };