Attributes Rewrite

[oota-llvm.git] / lib / Transforms / IPO / PassManagerBuilder.cpp

diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp
index 43b4ab5efa4df369781c02d2f9f08eeafd795861..a2862022a3bd2bedd6e2b4786d3003f8c1389f30 100644 (file)
--- a/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -40,6 +40,10 @@ UseGVNAfterVectorization("use-gvn-after-vectorization",
   cl::init(false), cl::Hidden,
   cl::desc("Run GVN instead of Early CSE after vectorization passes"));
 
+static cl::opt<bool> UseNewSROA("use-new-sroa",
+  cl::init(true), cl::Hidden,
+  cl::desc("Enable the new, experimental SROA pass"));
+
 PassManagerBuilder::PassManagerBuilder() {
     OptLevel = 2;
     SizeLevel = 0;
@@ -100,7 +104,10 @@ void PassManagerBuilder::populateFunctionPassManager(FunctionPassManager &FPM) {
   addInitialAliasAnalysisPasses(FPM);
 
   FPM.add(createCFGSimplificationPass());
-  FPM.add(createScalarReplAggregatesPass());
+  if (UseNewSROA)
+    FPM.add(createSROAPass());
+  else
+    FPM.add(createScalarReplAggregatesPass());
   FPM.add(createEarlyCSEPass());
   FPM.add(createLowerExpectIntrinsicPass());
 }
@@ -147,7 +154,10 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
 
   // Start of function pass.
   // Break up aggregate allocas, using SSAUpdater.
-  MPM.add(createScalarReplAggregatesPass(-1, false));
+  if (UseNewSROA)
+    MPM.add(createSROAPass(/*RequiresDomTree*/ false));
+  else
+    MPM.add(createScalarReplAggregatesPass(-1, false));
   MPM.add(createEarlyCSEPass());              // Catch trivial redundancies
   if (!DisableSimplifyLibCalls)
     MPM.add(createSimplifyLibCallsPass());    // Library Call Optimizations
@@ -201,13 +211,12 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
     // FIXME: We shouldn't bother with this anymore.
     MPM.add(createStripDeadPrototypesPass()); // Get rid of dead prototypes
 
-    // GlobalOpt already deletes dead functions and globals, at -O3 try a
+    // GlobalOpt already deletes dead functions and globals, at -O2 try a
     // late pass of GlobalDCE.  It is capable of deleting dead cycles.
-    if (OptLevel > 2)
+    if (OptLevel > 1) {
       MPM.add(createGlobalDCEPass());         // Remove dead fns and globals.
-
-    if (OptLevel > 1)
       MPM.add(createConstantMergePass());     // Merge dup global constants
+    }
   }
   addExtensionsToPM(EP_OptimizerLast, MPM);
 }
@@ -265,7 +274,10 @@ void PassManagerBuilder::populateLTOPassManager(PassManagerBase &PM,
   PM.add(createInstructionCombiningPass());
   PM.add(createJumpThreadingPass());
   // Break up allocas
-  PM.add(createScalarReplAggregatesPass());
+  if (UseNewSROA)
+    PM.add(createSROAPass());
+  else
+    PM.add(createScalarReplAggregatesPass());
 
   // Run a few AA driven optimizations here and now, to cleanup the code.
   PM.add(createFunctionAttrsPass()); // Add nocapture.