Sign extend ints in trans_const_value

bjorn3 · bjorn3 · commit b0ecbf14a23a · 2019-03-11T20:44:05.000+01:00
diff --git a/src/constant.rs b/src/constant.rs
@@ -116,7 +116,7 @@ fn trans_const_value<'a, 'tcx: 'a>(
         }
         ty::Int(_) => {
             let bits = const_.val.try_to_bits(layout.size).unwrap();
-            CValue::const_val(fx, ty, bits as i128 as i64)
+            CValue::const_val(fx, ty, rustc::mir::interpret::sign_extend(bits, layout.size) as i128 as i64)
         }
         ty::FnDef(_def_id, _substs) => CValue::ByRef(
             fx.bcx

Original file line number	Diff line number	Diff line change
`@@ -116,7 +116,7 @@ fn trans_const_value<'a, 'tcx: 'a>(`
`116`	`116`	`}`
`117`	`117`	`ty::Int(_) => {`
`118`	`118`	`let bits = const_.val.try_to_bits(layout.size).unwrap();`
`119`		`- CValue::const_val(fx, ty, bits as i128 as i64)`
	`119`	`+ CValue::const_val(fx, ty, rustc::mir::interpret::sign_extend(bits, layout.size) as i128 as i64)`
`120`	`120`	`}`
`121`	`121`	`ty::FnDef(_def_id, _substs) => CValue::ByRef(`
`122`	`122`	`fx.bcx`