Hexagon: add support for predicate-GPR copies.

llvm-svn: 175102
diff --git a/llvm/test/CodeGen/Hexagon/predicate-copy.ll b/llvm/test/CodeGen/Hexagon/predicate-copy.ll
new file mode 100644
index 0000000..552b687
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/predicate-copy.ll
@@ -0,0 +1,8 @@
+; RUN: llc -march=hexagon -mcpu=hexagonv4 -O3 < %s | FileCheck %s
+
+; CHECK: r{{[0-9]+}} = p{{[0-9]+}}
+define i1 @foo() {
+entry:
+  ret i1 false
+}
+