From: Nemanja Ivanovic <nemanja.i.ibm@gmail.com>
Date: Wed, 20 Dec 2017 15:44:32 +0000 (+0000)
Subject: [JumpTables] Let targets decide which switch instructions are suitable
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=39c264a5b7867acd4aa18a8890376d0d2c08c859;p=llvm

[JumpTables] Let targets decide which switch instructions are suitable

This commits the non-controversial part of https://reviews.llvm.org/D41029
(making the queries virtual). The PPC-specific portion of this will be
committed in a subsequent patch once some of the finer points are ironed out.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321182 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/CodeGen/TargetLowering.h b/include/llvm/CodeGen/TargetLowering.h
index 4cf589e0c75..380e3b19dc8 100644
--- a/include/llvm/CodeGen/TargetLowering.h
+++ b/include/llvm/CodeGen/TargetLowering.h
@@ -824,8 +824,8 @@ public:
   /// also combined within this function. Currently, the minimum size check is
   /// performed in findJumpTable() in SelectionDAGBuiler and
   /// getEstimatedNumberOfCaseClusters() in BasicTTIImpl.
-  bool isSuitableForJumpTable(const SwitchInst *SI, uint64_t NumCases,
-                              uint64_t Range) const {
+  virtual bool isSuitableForJumpTable(const SwitchInst *SI, uint64_t NumCases,
+                                      uint64_t Range) const {
     const bool OptForSize = SI->getParent()->getParent()->optForSize();
     const unsigned MinDensity = getMinimumJumpTableDensity(OptForSize);
     const unsigned MaxJumpTableSize =
@@ -1276,7 +1276,7 @@ public:
   }
 
   /// Return lower limit for number of blocks in a jump table.
-  unsigned getMinimumJumpTableEntries() const;
+  virtual unsigned getMinimumJumpTableEntries() const;
 
   /// Return lower limit of the density in a jump table.
   unsigned getMinimumJumpTableDensity(bool OptForSize) const;