Add an addition operator to TableGen

This adds an !add(a, b) operator to tablegen; this will be used
to cleanup the PPC register definitions.

llvm-svn: 173445

1 files changed, 15 insertions, 0 deletions

diff --git a/llvm/test/TableGen/math.td b/llvm/test/TableGen/math.td
new file mode 100644
index 00000000000..1f3a500f089
--- /dev/null
+++ b/llvm/test/TableGen/math.td
@@ -0,0 +1,15 @@
+// RUN: llvm-tblgen %s | FileCheck %s
+
+class Int<int value> {
+  int Value = value;
+}
+
+def v1024   : Int<1024>;
+// CHECK: Value = 1024
+
+def v1025   : Int<!add(v1024.Value, 1)>;
+// CHECK: Value = 1025
+
+def v2048   : Int<!add(v1024.Value, v1024.Value)>;
+// CHECK: Value = 2048
+