support arithmetic for non byte aligned integer types

see #261

2 files changed, 26 insertions, 0 deletions

diff --git a/test/cases/math.zig b/test/cases/math.zig
index 7dde0bf62c..55f6680493 100644
--- a/test/cases/math.zig
+++ b/test/cases/math.zig
@@ -180,3 +180,24 @@ fn binaryNot() {
 fn testBinaryNot(x: u16) {
     assert(~x == 0b0101010101010101);
 }
+
+fn smallIntAddition() {
+    @setFnTest(this);
+
+    var x: @intType(false, 2) = 0;
+    assert(x == 0);
+
+    x += 1;
+    assert(x == 1);
+
+    x += 1;
+    assert(x == 2);
+
+    x += 1;
+    assert(x == 3);
+
+    var result: @typeOf(x) = 3;
+    assert(@addWithOverflow(@typeOf(x), x, 1, &result));
+
+    assert(result == 0);
+}
diff --git a/test/cases/struct.zig b/test/cases/struct.zig
index 403133e369..1d30040f86 100644
--- a/test/cases/struct.zig
+++ b/test/cases/struct.zig
@@ -244,11 +244,16 @@ fn bitFieldAccess() {
         .b = 2,
         .c = 3,
     };
+    assert(getA(&data) == 1);
     assert(getB(&data) == 2);
     assert(getC(&data) == 3);
     comptime assert(@sizeOf(BitField1) == 1);
 }
 
+fn getA(data: &const BitField1) -> u3 {
+    return data.a;
+}
+
 fn getB(data: &const BitField1) -> u3 {
     return data.b;
 }