[SimplifyCFG] use pass options and remove the latesimplifycfg pass

This is no-functional-change-intended. This is repackaging the functionality of D30333 (defer switch-to-lookup-tables) and D35411 (defer folding unconditional branches) with pass parameters rather than a named "latesimplifycfg" pass. Now that we have individual options to control the functionality, we could decouple when these fire (but that's an independent patch if desired). The next planned step would be to add another option bit to disable the sinking transform mentioned in D38566. This should also make it clear that the new pass manager needs to be updated to limit simplifycfg in the same way as the old pass manager. Differential Revision: https://reviews.llvm.org/D38631 llvm-svn: 316835
llvm · Oct 28, 2017 · b049173 · b049173
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Showing 25 changed files with 187 additions and 137 deletions.
diff --git a/llvm/include/llvm-c/Transforms/Scalar.h b/llvm/include/llvm-c/Transforms/Scalar.h
@@ -44,9 +44,6 @@ void LLVMAddAlignmentFromAssumptionsPass(LLVMPassManagerRef PM);
 /** See llvm::createCFGSimplificationPass function. */
 void LLVMAddCFGSimplificationPass(LLVMPassManagerRef PM);
 
-/** See llvm::createLateCFGSimplificationPass function. */
-void LLVMAddLateCFGSimplificationPass(LLVMPassManagerRef PM);
-
 /** See llvm::createDeadStoreEliminationPass function. */
 void LLVMAddDeadStoreEliminationPass(LLVMPassManagerRef PM);
 

diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
@@ -174,7 +174,6 @@ void initializeIntervalPartitionPass(PassRegistry&);
 void initializeJumpThreadingPass(PassRegistry&);
 void initializeLCSSAVerificationPassPass(PassRegistry&);
 void initializeLCSSAWrapperPassPass(PassRegistry&);
-void initializeLateCFGSimplifyPassPass(PassRegistry&);
 void initializeLazyBlockFrequencyInfoPassPass(PassRegistry&);
 void initializeLazyBranchProbabilityInfoPassPass(PassRegistry&);
 void initializeLazyMachineBlockFrequencyInfoPassPass(PassRegistry&);

diff --git a/llvm/include/llvm/LinkAllPasses.h b/llvm/include/llvm/LinkAllPasses.h
@@ -75,7 +75,6 @@ namespace {
       (void) llvm::createCallGraphDOTPrinterPass();
       (void) llvm::createCallGraphViewerPass();
       (void) llvm::createCFGSimplificationPass();
-      (void) llvm::createLateCFGSimplificationPass();
       (void) llvm::createCFLAndersAAWrapperPass();
       (void) llvm::createCFLSteensAAWrapperPass();
       (void) llvm::createStructurizeCFGPass();

diff --git a/llvm/include/llvm/Transforms/Scalar.h b/llvm/include/llvm/Transforms/Scalar.h
@@ -255,18 +255,12 @@ FunctionPass *createJumpThreadingPass(int Threshold = -1);
 //===----------------------------------------------------------------------===//
 //
 // CFGSimplification - Merge basic blocks, eliminate unreachable blocks,
-// simplify terminator instructions, etc...
+// simplify terminator instructions, convert switches to lookup tables, etc.
 //
 FunctionPass *createCFGSimplificationPass(
-    int Threshold = -1, std::function<bool(const Function &)> Ftor = nullptr);
-
-//===----------------------------------------------------------------------===//
-//
-// LateCFGSimplification - Like CFGSimplification, but may also
-// convert switches to lookup tables.
-//
-FunctionPass *createLateCFGSimplificationPass(
-    int Threshold = -1, std::function<bool(const Function &)> Ftor = nullptr);
+    unsigned Threshold = 1, bool ForwardSwitchCond = false,
+    bool ConvertSwitch = false, bool KeepLoops = true,
+    std::function<bool(const Function &)> Ftor = nullptr);
 
 //===----------------------------------------------------------------------===//
 //

diff --git a/llvm/include/llvm/Transforms/Scalar/SimplifyCFG.h b/llvm/include/llvm/Transforms/Scalar/SimplifyCFG.h
@@ -31,8 +31,16 @@ class SimplifyCFGPass : public PassInfoMixin<SimplifyCFGPass> {
   SimplifyCFGOptions Options;
 
 public:
-  /// Construct a pass with default options.
-  SimplifyCFGPass();
+  /// The default constructor sets the pass options to create optimal IR,
+  /// rather than canonical IR. That is, by default we do transformations that
+  /// are likely to improve performance but make analysis more difficult.
+  /// FIXME: This is inverted from what most instantiations of the pass should
+  /// be.
+  SimplifyCFGPass()
+      : SimplifyCFGPass(SimplifyCFGOptions()
+                            .forwardSwitchCondToPhi(true)
+                            .convertSwitchToLookupTable(true)
+                            .needCanonicalLoops(false)) {}
 
   /// Construct a pass with optional optimizations.
   SimplifyCFGPass(const SimplifyCFGOptions &PassOptions);

diff --git a/llvm/include/llvm/Transforms/Utils/Local.h b/llvm/include/llvm/Transforms/Utils/Local.h
@@ -65,13 +65,36 @@ struct SimplifyCFGOptions {
   bool NeedCanonicalLoop;
   AssumptionCache *AC;
 
-  SimplifyCFGOptions(int BonusThreshold = 1, bool ForwardSwitchCond = false,
+  SimplifyCFGOptions(unsigned BonusThreshold = 1,
+                     bool ForwardSwitchCond = false,
                      bool SwitchToLookup = false, bool CanonicalLoops = true,
                      AssumptionCache *AssumpCache = nullptr)
       : BonusInstThreshold(BonusThreshold),
         ForwardSwitchCondToPhi(ForwardSwitchCond),
         ConvertSwitchToLookupTable(SwitchToLookup),
         NeedCanonicalLoop(CanonicalLoops), AC(AssumpCache) {}
+
+  // Support 'builder' pattern to set members by name at construction time.
+  SimplifyCFGOptions &bonusInstThreshold(int I) {
+    BonusInstThreshold = I;
+    return *this;
+  }
+  SimplifyCFGOptions &forwardSwitchCondToPhi(bool B) {
+    ForwardSwitchCondToPhi = B;
+    return *this;
+  }
+  SimplifyCFGOptions &convertSwitchToLookupTable(bool B) {
+    ConvertSwitchToLookupTable = B;
+    return *this;
+  }
+  SimplifyCFGOptions &needCanonicalLoops(bool B) {
+    NeedCanonicalLoop = B;
+    return *this;
+  }
+  SimplifyCFGOptions &setAssumptionCache(AssumptionCache *Cache) {
+    AC = Cache;
+    return *this;
+  }
 };
 
 //===----------------------------------------------------------------------===//

diff --git a/llvm/lib/LTO/LTOCodeGenerator.cpp b/llvm/lib/LTO/LTOCodeGenerator.cpp
@@ -131,7 +131,6 @@ void LTOCodeGenerator::initializeLTOPasses() {
   initializeMemCpyOptLegacyPassPass(R);
   initializeDCELegacyPassPass(R);
   initializeCFGSimplifyPassPass(R);
-  initializeLateCFGSimplifyPassPass(R);
 }
 
 void LTOCodeGenerator::setAsmUndefinedRefs(LTOModule *Mod) {

diff --git a/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp b/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
@@ -365,7 +365,7 @@ void AArch64PassConfig::addIRPasses() {
   // determine whether it succeeded. We can exploit existing control-flow in
   // ldrex/strex loops to simplify this, but it needs tidying up.
   if (TM->getOptLevel() != CodeGenOpt::None && EnableAtomicTidy)
-    addPass(createLateCFGSimplificationPass());
+    addPass(createCFGSimplificationPass(1, true, true, false));
 
   // Run LoopDataPrefetch
   //

diff --git a/llvm/lib/Target/ARM/ARMTargetMachine.cpp b/llvm/lib/Target/ARM/ARMTargetMachine.cpp
@@ -384,10 +384,11 @@ void ARMPassConfig::addIRPasses() {
   // determine whether it succeeded. We can exploit existing control-flow in
   // ldrex/strex loops to simplify this, but it needs tidying up.
   if (TM->getOptLevel() != CodeGenOpt::None && EnableAtomicTidy)
-    addPass(createCFGSimplificationPass(-1, [this](const Function &F) {
-      const auto &ST = this->TM->getSubtarget<ARMSubtarget>(F);
-      return ST.hasAnyDataBarrier() && !ST.isThumb1Only();
-    }));
+    addPass(createCFGSimplificationPass(
+        1, false, false, true, [this](const Function &F) {
+          const auto &ST = this->TM->getSubtarget<ARMSubtarget>(F);
+          return ST.hasAnyDataBarrier() && !ST.isThumb1Only();
+        }));
 
   TargetPassConfig::addIRPasses();
 

diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -625,7 +625,9 @@ void PassManagerBuilder::populateModulePassManager(
   }
 
   addExtensionsToPM(EP_Peephole, MPM);
-  MPM.add(createLateCFGSimplificationPass()); // Switches to lookup tables
+  // Switches to lookup tables and other transforms that may not be considered
+  // canonical by other IR passes.
+  MPM.add(createCFGSimplificationPass(1, true, true, false));
   addInstructionCombiningPass(MPM);
 
   if (!DisableUnrollLoops) {

diff --git a/llvm/lib/Transforms/Scalar/Scalar.cpp b/llvm/lib/Transforms/Scalar/Scalar.cpp
@@ -85,7 +85,6 @@ void llvm::initializeScalarOpts(PassRegistry &Registry) {
   initializeIPSCCPLegacyPassPass(Registry);
   initializeSROALegacyPassPass(Registry);
   initializeCFGSimplifyPassPass(Registry);
-  initializeLateCFGSimplifyPassPass(Registry);
   initializeStructurizeCFGPass(Registry);
   initializeSimpleLoopUnswitchLegacyPassPass(Registry);
   initializeSinkingLegacyPassPass(Registry);
@@ -119,11 +118,7 @@ void LLVMAddAlignmentFromAssumptionsPass(LLVMPassManagerRef PM) {
 }
 
 void LLVMAddCFGSimplificationPass(LLVMPassManagerRef PM) {
-  unwrap(PM)->add(createCFGSimplificationPass());
-}
-
-void LLVMAddLateCFGSimplificationPass(LLVMPassManagerRef PM) {
-  unwrap(PM)->add(createLateCFGSimplificationPass());
+  unwrap(PM)->add(createCFGSimplificationPass(1, false, false, true));
 }
 
 void LLVMAddDeadStoreEliminationPass(LLVMPassManagerRef PM) {

diff --git a/llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp b/llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp
@@ -45,9 +45,21 @@ using namespace llvm;
 
 #define DEBUG_TYPE "simplifycfg"
 
-static cl::opt<unsigned>
-UserBonusInstThreshold("bonus-inst-threshold", cl::Hidden, cl::init(1),
-   cl::desc("Control the number of bonus instructions (default = 1)"));
+static cl::opt<unsigned> UserBonusInstThreshold(
+    "bonus-inst-threshold", cl::Hidden, cl::init(1),
+    cl::desc("Control the number of bonus instructions (default = 1)"));
+
+static cl::opt<bool> UserKeepLoops(
+    "keep-loops", cl::Hidden, cl::init(true),
+    cl::desc("Preserve canonical loop structure (default = true)"));
+
+static cl::opt<bool> UserSwitchToLookup(
+    "switch-to-lookup", cl::Hidden, cl::init(false),
+    cl::desc("Convert switches to lookup tables (default = false)"));
+
+static cl::opt<bool> UserForwardSwitchCond(
+    "forward-switch-cond", cl::Hidden, cl::init(false),
+    cl::desc("Forward switch condition to phi ops (default = false)"));
 
 STATISTIC(NumSimpl, "Number of blocks simplified");
 
@@ -179,13 +191,21 @@ static bool simplifyFunctionCFG(Function &F, const TargetTransformInfo &TTI,
   return true;
 }
 
-// FIXME: The new pass manager always creates a "late" simplifycfg pass using
-// this default constructor.
-SimplifyCFGPass::SimplifyCFGPass()
-    : Options(UserBonusInstThreshold, true, true, false) {}
-
-SimplifyCFGPass::SimplifyCFGPass(const SimplifyCFGOptions &PassOptions)
-    : Options(PassOptions) {}
+// Command-line settings override compile-time settings.
+SimplifyCFGPass::SimplifyCFGPass(const SimplifyCFGOptions &Opts) {
+  Options.BonusInstThreshold = UserBonusInstThreshold.getNumOccurrences()
+                                   ? UserBonusInstThreshold
+                                   : Opts.BonusInstThreshold;
+  Options.ForwardSwitchCondToPhi = UserForwardSwitchCond.getNumOccurrences()
+                                       ? UserForwardSwitchCond
+                                       : Opts.ForwardSwitchCondToPhi;
+  Options.ConvertSwitchToLookupTable = UserSwitchToLookup.getNumOccurrences()
+                                           ? UserSwitchToLookup
+                                           : Opts.ConvertSwitchToLookupTable;
+  Options.NeedCanonicalLoop = UserKeepLoops.getNumOccurrences()
+                                  ? UserKeepLoops
+                                  : Opts.NeedCanonicalLoop;
+}
 
 PreservedAnalyses SimplifyCFGPass::run(Function &F,
                                        FunctionAnalysisManager &AM) {
@@ -199,62 +219,49 @@ PreservedAnalyses SimplifyCFGPass::run(Function &F,
 }
 
 namespace {
-struct BaseCFGSimplifyPass : public FunctionPass {
+struct CFGSimplifyPass : public FunctionPass {
+  static char ID;
+  SimplifyCFGOptions Options;
   std::function<bool(const Function &)> PredicateFtor;
-  int BonusInstThreshold;
-  bool ForwardSwitchCondToPhi;
-  bool ConvertSwitchToLookupTable;
-  bool KeepCanonicalLoops;
-
-  BaseCFGSimplifyPass(int T, bool ForwardSwitchCond, bool ConvertSwitch,
-                      bool KeepLoops,
-                      std::function<bool(const Function &)> Ftor, char &ID)
-      : FunctionPass(ID), PredicateFtor(std::move(Ftor)),
-        ForwardSwitchCondToPhi(ForwardSwitchCond),
-        ConvertSwitchToLookupTable(ConvertSwitch),
-        KeepCanonicalLoops(KeepLoops) {
-    BonusInstThreshold = (T == -1) ? UserBonusInstThreshold : T;
+
+  CFGSimplifyPass(unsigned Threshold = 1, bool ForwardSwitchCond = false,
+                  bool ConvertSwitch = false, bool KeepLoops = true,
+                  std::function<bool(const Function &)> Ftor = nullptr)
+      : FunctionPass(ID), PredicateFtor(std::move(Ftor)) {
+
+    initializeCFGSimplifyPassPass(*PassRegistry::getPassRegistry());
+
+    // Check for command-line overrides of options for debug/customization.
+    Options.BonusInstThreshold = UserBonusInstThreshold.getNumOccurrences()
+                                    ? UserBonusInstThreshold
+                                    : Threshold;
+
+    Options.ForwardSwitchCondToPhi = UserForwardSwitchCond.getNumOccurrences()
+                                         ? UserForwardSwitchCond
+                                         : ForwardSwitchCond;
+
+    Options.ConvertSwitchToLookupTable = UserSwitchToLookup.getNumOccurrences()
+                                             ? UserSwitchToLookup
+                                             : ConvertSwitch;
+
+    Options.NeedCanonicalLoop =
+        UserKeepLoops.getNumOccurrences() ? UserKeepLoops : KeepLoops;
   }
+
   bool runOnFunction(Function &F) override {
     if (skipFunction(F) || (PredicateFtor && !PredicateFtor(F)))
       return false;
 
-    AssumptionCache *AC =
-        &getAnalysis<AssumptionCacheTracker>().getAssumptionCache(F);
-    const TargetTransformInfo &TTI =
-        getAnalysis<TargetTransformInfoWrapperPass>().getTTI(F);
-    return simplifyFunctionCFG(F, TTI,
-                               {BonusInstThreshold, ForwardSwitchCondToPhi,
-                                ConvertSwitchToLookupTable, KeepCanonicalLoops,
-                                AC});
+    Options.AC = &getAnalysis<AssumptionCacheTracker>().getAssumptionCache(F);
+    auto &TTI = getAnalysis<TargetTransformInfoWrapperPass>().getTTI(F);
+    return simplifyFunctionCFG(F, TTI, Options);
   }
-
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<AssumptionCacheTracker>();
     AU.addRequired<TargetTransformInfoWrapperPass>();
     AU.addPreserved<GlobalsAAWrapperPass>();
   }
 };
-
-struct CFGSimplifyPass : public BaseCFGSimplifyPass {
-  static char ID; // Pass identification, replacement for typeid
-
-  CFGSimplifyPass(int T = -1,
-                  std::function<bool(const Function &)> Ftor = nullptr)
-                  : BaseCFGSimplifyPass(T, false, false, true, Ftor, ID) {
-    initializeCFGSimplifyPassPass(*PassRegistry::getPassRegistry());
-  }
-};
-
-struct LateCFGSimplifyPass : public BaseCFGSimplifyPass {
-  static char ID; // Pass identification, replacement for typeid
-
-  LateCFGSimplifyPass(int T = -1,
-                      std::function<bool(const Function &)> Ftor = nullptr)
-                      : BaseCFGSimplifyPass(T, true, true, false, Ftor, ID) {
-    initializeLateCFGSimplifyPassPass(*PassRegistry::getPassRegistry());
-  }
-};
 }
 
 char CFGSimplifyPass::ID = 0;
@@ -265,24 +272,11 @@ INITIALIZE_PASS_DEPENDENCY(AssumptionCacheTracker)
 INITIALIZE_PASS_END(CFGSimplifyPass, "simplifycfg", "Simplify the CFG", false,
                     false)
 
-char LateCFGSimplifyPass::ID = 0;
-INITIALIZE_PASS_BEGIN(LateCFGSimplifyPass, "latesimplifycfg",
-                      "Simplify the CFG more aggressively", false, false)
-INITIALIZE_PASS_DEPENDENCY(TargetTransformInfoWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(AssumptionCacheTracker)
-INITIALIZE_PASS_END(LateCFGSimplifyPass, "latesimplifycfg",
-                    "Simplify the CFG more aggressively", false, false)
-
 // Public interface to the CFGSimplification pass
 FunctionPass *
-llvm::createCFGSimplificationPass(int Threshold,
-    std::function<bool(const Function &)> Ftor) {
-  return new CFGSimplifyPass(Threshold, std::move(Ftor));
-}
-
-// Public interface to the LateCFGSimplification pass
-FunctionPass *
-llvm::createLateCFGSimplificationPass(int Threshold, 
+llvm::createCFGSimplificationPass(unsigned Threshold, bool ForwardSwitchCond,
+                                  bool ConvertSwitch, bool KeepLoops,
                                   std::function<bool(const Function &)> Ftor) {
-  return new LateCFGSimplifyPass(Threshold, std::move(Ftor));
+  return new CFGSimplifyPass(Threshold, ForwardSwitchCond, ConvertSwitch,
+                             KeepLoops, std::move(Ftor));
 }
diff --git a/llvm/test/CodeGen/AArch64/cmpxchg-idioms.ll b/llvm/test/CodeGen/AArch64/cmpxchg-idioms.ll
@@ -107,7 +107,7 @@ define i1 @test_conditional2(i32 %a, i32 %b, i32* %c) {
 ; CHECK: [[FAILED]]:
 ; CHECK-NOT: cmp {{w[0-9]+}}, {{w[0-9]+}}
 
-; verify the preheader is simplified by latesimplifycfg.
+; verify the preheader is simplified by simplifycfg.
 ; CHECK: [[PH]]:
 ; CHECK: orr w22, wzr, #0x2
 ; CHECK-NOT: orr w22, wzr, #0x4

diff --git a/llvm/test/Transforms/LoopVectorize/X86/float-induction-x86.ll b/llvm/test/Transforms/LoopVectorize/X86/float-induction-x86.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s  -O3 -latesimplifycfg -mcpu=core-avx2 -mtriple=x86_64-unknown-linux-gnu -S | FileCheck --check-prefix AUTO_VEC %s
+; RUN: opt < %s  -O3 -simplifycfg -keep-loops=false -mcpu=core-avx2 -mtriple=x86_64-unknown-linux-gnu -S | FileCheck --check-prefix AUTO_VEC %s
 
 ; This test checks auto-vectorization with FP induction variable.
 ; The FP operation is not "fast" and requires "fast-math" function attribute.

diff --git a/llvm/test/Transforms/LoopVectorize/float-induction.ll b/llvm/test/Transforms/LoopVectorize/float-induction.ll
@@ -1,7 +1,7 @@
 ; RUN: opt < %s  -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -S | FileCheck --check-prefix VEC4_INTERL1 %s
 ; RUN: opt < %s  -loop-vectorize -force-vector-interleave=2 -force-vector-width=4 -dce -instcombine -S | FileCheck --check-prefix VEC4_INTERL2 %s
 ; RUN: opt < %s  -loop-vectorize -force-vector-interleave=2 -force-vector-width=1 -dce -instcombine -S | FileCheck --check-prefix VEC1_INTERL2 %s
-; RUN: opt < %s  -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 -dce -simplifycfg -instcombine -latesimplifycfg -S | FileCheck --check-prefix VEC2_INTERL1_PRED_STORE %s
+; RUN: opt < %s  -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 -dce -simplifycfg -instcombine -simplifycfg -keep-loops=false -S | FileCheck --check-prefix VEC2_INTERL1_PRED_STORE %s
 
 @fp_inc = common global float 0.000000e+00, align 4
 

diff --git a/llvm/test/Transforms/SimplifyCFG/ARM/switch-to-lookup-table.ll b/llvm/test/Transforms/SimplifyCFG/ARM/switch-to-lookup-table.ll
@@ -1,8 +1,8 @@
-; RUN: opt -S -latesimplifycfg -mtriple=arm -relocation-model=static    < %s | FileCheck %s --check-prefix=CHECK --check-prefix=ENABLE
-; RUN: opt -S -latesimplifycfg -mtriple=arm -relocation-model=pic       < %s | FileCheck %s --check-prefix=CHECK --check-prefix=ENABLE
-; RUN: opt -S -latesimplifycfg -mtriple=arm -relocation-model=ropi      < %s | FileCheck %s --check-prefix=CHECK --check-prefix=DISABLE
-; RUN: opt -S -latesimplifycfg -mtriple=arm -relocation-model=rwpi      < %s | FileCheck %s --check-prefix=CHECK --check-prefix=DISABLE
-; RUN: opt -S -latesimplifycfg -mtriple=arm -relocation-model=ropi-rwpi < %s | FileCheck %s --check-prefix=CHECK --check-prefix=DISABLE
+; RUN: opt -S -simplifycfg -switch-to-lookup -mtriple=arm -relocation-model=static    < %s | FileCheck %s --check-prefix=CHECK --check-prefix=ENABLE
+; RUN: opt -S -simplifycfg -switch-to-lookup -mtriple=arm -relocation-model=pic       < %s | FileCheck %s --check-prefix=CHECK --check-prefix=ENABLE
+; RUN: opt -S -simplifycfg -switch-to-lookup -mtriple=arm -relocation-model=ropi      < %s | FileCheck %s --check-prefix=CHECK --check-prefix=DISABLE
+; RUN: opt -S -simplifycfg -switch-to-lookup -mtriple=arm -relocation-model=rwpi      < %s | FileCheck %s --check-prefix=CHECK --check-prefix=DISABLE
+; RUN: opt -S -simplifycfg -switch-to-lookup -mtriple=arm -relocation-model=ropi-rwpi < %s | FileCheck %s --check-prefix=CHECK --check-prefix=DISABLE
 
 ; CHECK:       @{{.*}} = private unnamed_addr constant [3 x i32] [i32 1234, i32 5678, i32 15532]
 ; ENABLE:      @{{.*}} = private unnamed_addr constant [3 x i32*] [i32* @c1, i32* @c2, i32* @c3]

diff --git a/llvm/test/Transforms/SimplifyCFG/CoveredLookupTable.ll b/llvm/test/Transforms/SimplifyCFG/CoveredLookupTable.ll
@@ -1,4 +1,4 @@
-; RUN: opt -latesimplifycfg -S %s | FileCheck %s
+; RUN: opt -simplifycfg -switch-to-lookup -S %s | FileCheck %s
 ; rdar://15268442
 
 target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-f128:128:128-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"