Add a late IR expansion pass for the experimental reduction intrinsics.

This pass uses a new target hook to decide whether or not to expand a particular
intrinsic to the shuffevector sequence.

Differential Revision: https://reviews.llvm.org/D32245

llvm-svn: 302631

1 files changed, 4 insertions, 5 deletions

diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
index d41fe62..81f033e 100644
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -1125,11 +1125,10 @@ static Value *addFastMathFlag(Value *V) {
 }
 
 // Helper to generate a log2 shuffle reduction.
-static Value *
-getShuffleReduction(IRBuilder<> &Builder, Value *Src, unsigned Op,
-                    RecurrenceDescriptor::MinMaxRecurrenceKind MinMaxKind =
-                        RecurrenceDescriptor::MRK_Invalid,
-                    ArrayRef<Value *> RedOps = ArrayRef<Value *>()) {
+Value *
+llvm::getShuffleReduction(IRBuilder<> &Builder, Value *Src, unsigned Op,
+                          RecurrenceDescriptor::MinMaxRecurrenceKind MinMaxKind,
+                          ArrayRef<Value *> RedOps) {
   unsigned VF = Src->getType()->getVectorNumElements();
   // VF is a power of 2 so we can emit the reduction using log2(VF) shuffles
   // and vector ops, reducing the set of values being computed by half each