[fast-isel] Make sure the FastLowerArguments function checks to make sure the
arguments type is a simple type.
rdar://13290455

llvm-svn: 176066
diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp
index ed17b11..b5c3270 100644
--- a/llvm/lib/Target/X86/X86FastISel.cpp
+++ b/llvm/lib/Target/X86/X86FastISel.cpp
@@ -1555,6 +1555,7 @@
       return false;
 
     EVT ArgVT = TLI.getValueType(ArgTy);
+    if (!ArgVT.isSimple()) return false;
     switch (ArgVT.getSimpleVT().SimpleTy) {
     case MVT::i32:
     case MVT::i64: