Teach tablegen to allow "let" expressions inside multiclasses,

providing more ways to factor out commonality from the records.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105776 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 29 insertions, 0 deletions

diff --git a/test/TableGen/LetInsideMultiClasses.td b/test/TableGen/LetInsideMultiClasses.td
new file mode 100644
index 0000000000..9238bf42d9
--- /dev/null
+++ b/test/TableGen/LetInsideMultiClasses.td
@@ -0,0 +1,29 @@
+// RUN: tblgen %s | grep "bit IsDouble = 1;" | count 3
+// XFAIL: vg_leak
+
+class Instruction<bits<4> opc, string Name> {
+  bits<4> opcode = opc;
+  string name = Name;
+  bit IsDouble = 0;
+}
+
+multiclass basic_r<bits<4> opc> {
+  let name = "newname" in {
+    def rr : Instruction<opc, "rr">;
+    def rm : Instruction<opc, "rm">;
+  }
+
+  let name = "othername" in
+    def rx : Instruction<opc, "rx">;
+}
+
+multiclass basic_ss<bits<4> opc> {
+  let IsDouble = 0 in
+    defm SS : basic_r<opc>;
+
+  let IsDouble = 1 in
+    defm SD : basic_r<opc>;
+}
+
+defm ADD : basic_ss<0xf>;
+