DDC: mostly incremental compilation, fixes #223

lib/runtime/dart/math.txt

Index: lib/runtime/dart/math.txt
diff --git a/lib/runtime/dart/math.txt b/lib/runtime/dart/math.txt
new file mode 100644
index 0000000000000000000000000000000000000000..518474f56bfbfa9c174d8c568662cd710237a654
--- /dev/null
+++ b/lib/runtime/dart/math.txt
@@ -0,0 +1,35 @@
+warning: [DownCastComposite] x + other.x (num) will need runtime check to cast to type T (dart:math/point.dart, line 37, col 25)
+warning: [DownCastComposite] y + other.y (num) will need runtime check to cast to type T (dart:math/point.dart, line 37, col 38)
+warning: [DownCastComposite] x - other.x (num) will need runtime check to cast to type T (dart:math/point.dart, line 46, col 25)
+warning: [DownCastComposite] y - other.y (num) will need runtime check to cast to type T (dart:math/point.dart, line 46, col 38)
+warning: [DownCastComposite] x * factor (num) will need runtime check to cast to type T (dart:math/point.dart, line 59, col 25)
+warning: [DownCastComposite] y * factor (num) will need runtime check to cast to type T (dart:math/point.dart, line 59, col 37)
+warning: [DownCastComposite] dx * dx + dy * dy (num) will need runtime check to cast to type T (dart:math/point.dart, line 86, col 12)
+warning: [DownCastComposite] left + width (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 33, col 18)
+warning: [DownCastComposite] top + height (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 35, col 19)
+warning: [DownCastComposite] x0 (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 68, col 33)
+warning: [DownCastComposite] y0 (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 68, col 37)
+warning: [DownCastComposite] x1 - x0 (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 68, col 41)
+warning: [DownCastComposite] y1 - y0 (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 68, col 50)
+warning: [DownCastComposite] left (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 95, col 29)
+warning: [DownCastComposite] top (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 95, col 35)
+warning: [DownCastComposite] right - left (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 95, col 40)
+warning: [DownCastComposite] bottom - top (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 95, col 54)
+warning: [DownCastComposite] this.left + this.width (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 119, col 41)
+warning: [DownCastComposite] this.left + this.width (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 120, col 44)
+warning: [DownCastComposite] this.top + this.height (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 121, col 7)
+warning: [DownCastComposite] this.top + this.height (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 123, col 7)
+warning: [DownCastComposite] (width < 0) ? -width * 0 : width (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 151, col 22)
+warning: [DownCastComposite] (height < 0) ? -height * 0 : height (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 152, col 23)
+warning: [DownCastComposite] min(a.x, b.x) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 167, col 14)
+warning: [DownCastComposite] max(a.x, b.x) - left (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 168, col 15)
+warning: [DownCastComposite] min(a.y, b.y) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 169, col 13)
+warning: [DownCastComposite] max(a.y, b.y) - top (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 170, col 16)
+warning: [DownCastComposite] (width < 0) ? _clampToZero(width) : width (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 212, col 23)
+warning: [DownCastComposite] (height < 0) ? _clampToZero(height) : height (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 213, col 24)
+warning: [DownCastComposite] min(a.x, b.x) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 228, col 14)
+warning: [DownCastComposite] max(a.x, b.x) - left (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 229, col 15)
+warning: [DownCastComposite] min(a.y, b.y) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 230, col 13)
+warning: [DownCastComposite] max(a.y, b.y) - top (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 231, col 16)
+warning: [DownCastComposite] _clampToZero(width) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 247, col 28)
+warning: [DownCastComposite] _clampToZero(height) (num) will need runtime check to cast to type T (dart:math/rectangle.dart, line 263, col 30)