[PGO][PGSO] DAG.shouldOptForSize part.

Summary:
(Split of off D67120)

SelectionDAG::shouldOptForSize changes for profile guided size optimization.

Reviewers: davidxl

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70095

1 files changed, 5 insertions, 3 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 4fa907a4dcf..1ed0dc2c979 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -28,10 +28,12 @@
 #include "llvm/ADT/Twine.h"
 #include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/BranchProbabilityInfo.h"
+#include "llvm/Analysis/BlockFrequencyInfo.h"
 #include "llvm/Analysis/ConstantFolding.h"
 #include "llvm/Analysis/EHPersonalities.h"
 #include "llvm/Analysis/Loads.h"
 #include "llvm/Analysis/MemoryLocation.h"
+#include "llvm/Analysis/ProfileSummaryInfo.h"
 #include "llvm/Analysis/TargetLibraryInfo.h"
 #include "llvm/Analysis/ValueTracking.h"
 #include "llvm/Analysis/VectorUtils.h"
@@ -5360,8 +5362,8 @@ static SDValue ExpandPowI(const SDLoc &DL, SDValue LHS, SDValue RHS,
     if (Val == 0)
       return DAG.getConstantFP(1.0, DL, LHS.getValueType());
 
-    const Function &F = DAG.getMachineFunction().getFunction();
-    if (!F.hasOptSize() ||
+    bool OptForSize = DAG.shouldOptForSize();
+    if (!OptForSize ||
         // If optimizing for size, don't insert too many multiplies.
         // This inserts up to 5 multiplies.
         countPopulation(Val) + Log2_32(Val) < 7) {
@@ -10441,7 +10443,7 @@ void SelectionDAGBuilder::visitSwitch(const SwitchInst &SI) {
     return;
   }
 
-  SL->findJumpTables(Clusters, &SI, DefaultMBB, nullptr, nullptr);
+  SL->findJumpTables(Clusters, &SI, DefaultMBB, DAG.getPSI(), DAG.getBFI());
   SL->findBitTestClusters(Clusters, &SI);
 
   LLVM_DEBUG({