Assert that the target provided hints are in the allocation order.

Target implementations of getRegAllocationHints() should use the
provided allocation order, and they can never return hints outside the
order. This is already documented in TargetRegisterInfo.h.

<rdar://problem/13240556>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175540 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/AllocationOrder.cpp b/lib/CodeGen/AllocationOrder.cpp
index 1d09d20f031e62ae8a759b5119cdb5ceded0cc34..3fa1f8ff206cdf0373efc6867e0e5ccbb724a9f8 100644 (file)
--- a/lib/CodeGen/AllocationOrder.cpp
+++ b/lib/CodeGen/AllocationOrder.cpp
@@ -44,4 +44,9 @@ AllocationOrder::AllocationOrder(unsigned VirtReg,
       dbgs() << '\n';
     }
   });
+#ifndef NDEBUG
+  for (unsigned I = 0, E = Hints.size(); I != E; ++I)
+    assert(std::find(Order.begin(), Order.end(), Hints[I]) != Order.end() &&
+           "Target hint is outside allocation order.");
+#endif
 }