lli: Switch to using ParseIRFile, for consistency with other LLVM tools.

 - Also, switch tests to not using llvm-as. They run 20% faster now, not that it matters.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118952 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/ExecutionEngine/2010-01-15-UndefValue.ll b/test/ExecutionEngine/2010-01-15-UndefValue.ll
index 33ca63a..6e7a392 100644
--- a/test/ExecutionEngine/2010-01-15-UndefValue.ll
+++ b/test/ExecutionEngine/2010-01-15-UndefValue.ll
@@ -1,5 +1,4 @@
-; RUN: llvm-as %s -o %t.bc
-; RUN: lli -force-interpreter=true %t.bc
+; RUN: lli -force-interpreter=true %s
 
 define i32 @main() {
        %a = add i32 0, undef