[PATCH] D152053: [InlineCost]Account for switch instructons when the switch condition could besimplified as a result of inlines.

[Mingming Liu via Phabricator via llvm-commits]

mingmingl created this revision.
Herald added subscribers: ChuanqiXu, haicheng, hiraditya.
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mingmingl requested review of this revision.
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Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152053

Files:
  llvm/lib/Analysis/InlineCost.cpp


Index: llvm/lib/Analysis/InlineCost.cpp
===================================================================
--- llvm/lib/Analysis/InlineCost.cpp
+++ llvm/lib/Analysis/InlineCost.cpp
@@ -853,6 +853,10 @@
                   SimplifiedValues.lookup(BI->getCondition()))) {
             CurrentSavings += InstrCost;
           }
+        } else if (SwitchInst *SI = dyn_cast<SwitchInst>(&I)) {
+          if (Value *V = SimplifiedValues.lookup(SI->getCondition()) &&
+                         isa<ConstantInt>(V))
+            CurrentSavings += InstrCost;
         } else if (Value *V = dyn_cast<Value>(&I)) {
           // Count an instruction as savings if we can fold it.
           if (SimplifiedValues.count(V)) {


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