[Hexagon] Change std::sort to llvm::sort in response to r327219

Summary:
r327219 added wrappers to std::sort which randomly shuffle the container before sorting.
This will help in uncovering non-determinism caused due to undefined sorting
order of objects having the same key.

To make use of that infrastructure we need to invoke llvm::sort instead of std::sort.

Note: This patch is one of a series of patches to replace *all* std::sort to llvm::sort. Refer the comments section in D44363 for a list of all the required patches.

Reviewers: kparzysz

Reviewed By: kparzysz

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D44857

llvm-svn: 328430
diff --git a/llvm/lib/Target/Hexagon/HexagonGenInsert.cpp b/llvm/lib/Target/Hexagon/HexagonGenInsert.cpp
index 9fb7d26..2582a02 100644
--- a/llvm/lib/Target/Hexagon/HexagonGenInsert.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonGenInsert.cpp
@@ -632,7 +632,7 @@
   SortableVectorType VRs;
   for (RegisterOrdering::iterator I = RB.begin(), E = RB.end(); I != E; ++I)
     VRs.push_back(I->first);
-  std::sort(VRs.begin(), VRs.end(), LexCmp);
+  llvm::sort(VRs.begin(), VRs.end(), LexCmp);
   // Transfer the results to the outgoing register ordering.
   for (unsigned i = 0, n = VRs.size(); i < n; ++i)
     RO.insert(std::make_pair(VRs[i], i));