[NFC][SCEV] Piping to pass TTI into SCEVExpander::isHighCostExpansionHelper()

Summary:
Future patches will make use of TTI to perform cost-model-driven `SCEVExpander::isHighCostExpansionHelper()`
This is a fully NFC patch to make things reviewable.

Reviewers: reames, mkazantsev, wmi, sanjoy

Reviewed By: mkazantsev

Subscribers: hiraditya, zzheng, javed.absar, dmgreen, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D73704

1 files changed, 7 insertions, 9 deletions

diff --git a/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp b/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
index ddb7479..c9cc511 100644
--- a/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
@@ -543,13 +543,11 @@ static bool canProfitablyUnrollMultiExitLoop(
 ///        if (extraiters != 0) jump Epil: // Omitted if unroll factor is 2.
 /// EpilExit:
 
-bool llvm::UnrollRuntimeLoopRemainder(Loop *L, unsigned Count,
-                                      bool AllowExpensiveTripCount,
-                                      bool UseEpilogRemainder,
-                                      bool UnrollRemainder, bool ForgetAllSCEV,
-                                      LoopInfo *LI, ScalarEvolution *SE,
-                                      DominatorTree *DT, AssumptionCache *AC,
-                                      bool PreserveLCSSA, Loop **ResultLoop) {
+bool llvm::UnrollRuntimeLoopRemainder(
+    Loop *L, unsigned Count, bool AllowExpensiveTripCount,
+    bool UseEpilogRemainder, bool UnrollRemainder, bool ForgetAllSCEV,
+    LoopInfo *LI, ScalarEvolution *SE, DominatorTree *DT, AssumptionCache *AC,
+    const TargetTransformInfo *TTI, bool PreserveLCSSA, Loop **ResultLoop) {
   LLVM_DEBUG(dbgs() << "Trying runtime unrolling on Loop: \n");
   LLVM_DEBUG(L->dump());
   LLVM_DEBUG(UseEpilogRemainder ? dbgs() << "Using epilog remainder.\n"
@@ -637,7 +635,7 @@ bool llvm::UnrollRuntimeLoopRemainder(Loop *L, unsigned Count,
   const DataLayout &DL = Header->getModule()->getDataLayout();
   SCEVExpander Expander(*SE, DL, "loop-unroll");
   if (!AllowExpensiveTripCount &&
-      Expander.isHighCostExpansion(TripCountSC, L, PreHeaderBR)) {
+      Expander.isHighCostExpansion(TripCountSC, L, TTI, PreHeaderBR)) {
     LLVM_DEBUG(dbgs() << "High cost for expanding trip count scev!\n");
     return false;
   }
@@ -949,7 +947,7 @@ bool llvm::UnrollRuntimeLoopRemainder(Loop *L, unsigned Count,
                     /*AllowExpensiveTripCount*/ false, /*PreserveCondBr*/ true,
                     /*PreserveOnlyFirst*/ false, /*TripMultiple*/ 1,
                     /*PeelCount*/ 0, /*UnrollRemainder*/ false, ForgetAllSCEV},
-                   LI, SE, DT, AC, /*ORE*/ nullptr, PreserveLCSSA);
+                   LI, SE, DT, AC, TTI, /*ORE*/ nullptr, PreserveLCSSA);
   }
 
   if (ResultLoop && UnrollResult != LoopUnrollResult::FullyUnrolled)