https://issues.dlang.org/show_bug.cgi?id=14114
Issue ID: 14114
Summary: DMD optimizer defeats use of volatileLoad/Store with
error: null dereference in function
Product: D
Version: D2
Hardware: x86_64
OS: Linux
Status: NEW
Severity: enhancement
Priority: P1
Component: DMD
Assignee: [email protected]
Reporter: [email protected]
>From the NG, the following example written by Walter as a way to demonstrate
volatileLoad/volatileStore actually does not work with -O
example.d(4): Error: null dereference in function _D7example5Ports1BFZh
---
import core.bitop;
struct Ports {
static ubyte B() { return volatileLoad(cast(ubyte *)0x0025); } // error
here
static void B(ubyte value) { volatileStore(cast(ubyte *)0x0025, value); }
}
void main() {
Ports.B = 7;
auto foo = Ports.B;
}
--
