1 files changed, 44 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizeMutations.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizeMutations.cpp
new file mode 100644
index 00000000000..961988515e5
--- /dev/null
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizeMutations.cpp
@@ -0,0 +1,44 @@
+//===- lib/CodeGen/GlobalISel/LegalizerMutations.cpp - Mutations ----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// A library of mutation factories to use for LegalityMutation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
+
+using namespace llvm;
+
+LegalizeMutation LegalizeMutations::identity(unsigned TypeIdx, LLT Ty) {
+  return
+      [=](const LegalityQuery &Query) { return std::make_pair(TypeIdx, Ty); };
+}
+
+LegalizeMutation LegalizeMutations::widenScalarToNextPow2(unsigned TypeIdx,
+                                                          unsigned Min) {
+  return [=](const LegalityQuery &Query) {
+    unsigned NewSizeInBits =
+        1 << Log2_32_Ceil(Query.Types[TypeIdx].getSizeInBits());
+    if (NewSizeInBits < Min)
+      NewSizeInBits = Min;
+    return std::make_pair(TypeIdx, LLT::scalar(NewSizeInBits));
+  };
+}
+
+LegalizeMutation LegalizeMutations::moreElementsToNextPow2(unsigned TypeIdx,
+                                                           unsigned Min) {
+  return [=](const LegalityQuery &Query) {
+    const LLT &VecTy = Query.Types[TypeIdx];
+    unsigned NewNumElements = 1 << Log2_32_Ceil(VecTy.getNumElements());
+    if (NewNumElements < Min)
+      NewNumElements = Min;
+    return std::make_pair(
+        TypeIdx, LLT::vector(NewNumElements, VecTy.getScalarSizeInBits()));
+  };
+}