Add regression test for RMW optimizations.

reference/shaders/comp/rmw-opt.comp

@@ -0,0 +1,27 @@
+#version 310 es
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+
+layout(binding = 0, std430) buffer SSBO
+{
+    int a;
+} _9;
+
+void main()
+{
+    _9.a += 10;
+    _9.a -= 10;
+    _9.a *= 10;
+    _9.a /= 10;
+    _9.a = _9.a << 2;
+    _9.a = _9.a >> 3;
+    _9.a &= 40;
+    _9.a ^= 10;
+    _9.a %= 40;
+    _9.a |= 1;
+    bool c = false;
+    bool d = true;
+    c = c && d;
+    d = d || c;
+    _9.a = int(c && d);
+}
+

shaders/comp/rmw-opt.comp

@@ -0,0 +1,27 @@
+#version 310 es
+layout(local_size_x = 1) in;
+
+layout(std430, binding = 0) buffer SSBO
+{
+	int a;
+};
+
+void main()
+{
+	a += 10;
+	a -= 10;
+	a *= 10;
+	a /= 10;
+	a <<= 2;
+	a >>= 3;
+	a &= 40;
+	a ^= 10;
+	a %= 40;
+	a |= 1;
+
+	bool c = false;
+	bool d = true;
+	c = c && d;
+	d = d || c;
+	a = c && d ? 1 : 0;
+}