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Work around ziglang/zig #17882 #153

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Work around ziglang/zig #17882 #153

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4 changes: 3 additions & 1 deletion src/mmio.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,9 @@ pub fn Mmio(comptime PackedT: type) type {
pub const underlying_type = PackedT;

pub inline fn read(addr: *volatile Self) PackedT {
return @bitCast(addr.raw);
const result: PackedT = @bitCast(addr.raw);
std.mem.doNotOptimizeAway(result); // work around https://github.com/ziglang/zig/issues/17882
return result;
}

pub inline fn write(addr: *volatile Self, val: PackedT) void {
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