disolve a hack, having CodeGenInstAlias decode the alias in the .td
file instead of the asmmatcher.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118324 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenInstruction.cpp b/utils/TableGen/CodeGenInstruction.cpp
index 7428f2c..3c58cc6 100644
--- a/utils/TableGen/CodeGenInstruction.cpp
+++ b/utils/TableGen/CodeGenInstruction.cpp
@@ -388,8 +388,16 @@
/// CodeGenInstAlias Implementation
//===----------------------------------------------------------------------===//
-CodeGenInstAlias::CodeGenInstAlias(Record *R) : TheDef(R), Operands(R) {
+CodeGenInstAlias::CodeGenInstAlias(Record *R, CodeGenTarget &T)
+ : TheDef(R), Operands(R) {
AsmString = R->getValueAsString("AsmString");
Result = R->getValueAsDag("ResultInst");
+
+ // Verify that the root of the result is an instruction.
+ DefInit *DI = dynamic_cast<DefInit*>(Result->getOperator());
+ if (DI == 0 || !DI->getDef()->isSubClassOf("Instruction"))
+ throw TGError(R->getLoc(), "result of inst alias should be an instruction");
+
+ ResultInst = &T.getInstruction(DI->getDef());
}