Hexagon backend support

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146412 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/Hexagon/struct_args.ll b/test/CodeGen/Hexagon/struct_args.ll
new file mode 100644
index 0000000..cc409db
--- /dev/null
+++ b/test/CodeGen/Hexagon/struct_args.ll
@@ -0,0 +1,15 @@
+; RUN: llc -march=hexagon -mcpu=hexagonv4 < %s | FileCheck %s
+; CHECK: r1:0 = or(r{{[0-9]}}:{{[0-9]}}, r{{[0-9]}}:{{[0-9]}})
+
+%struct.small = type { i32, i32 }
+
+@s1 = common global %struct.small zeroinitializer, align 4
+
+define void @foo() nounwind {
+entry:
+  %0 = load i64* bitcast (%struct.small* @s1 to i64*), align 1
+  call void @bar(i64 %0)
+  ret void
+}
+
+declare void @bar(i64)