Prologue support

[oota-llvm.git] / lib / CodeGen / Passes.cpp

diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp
index 319c2c865039829f05a43a91c9410a6f7f78010a..ec71d86d09fa637bcbaf5349b3dceb558183e44b 100644 (file)
--- a/lib/CodeGen/Passes.cpp
+++ b/lib/CodeGen/Passes.cpp
@@ -27,6 +27,7 @@
 #include "llvm/Target/TargetLowering.h"
 #include "llvm/Target/TargetSubtargetInfo.h"
 #include "llvm/Transforms/Scalar.h"
+#include "llvm/Transforms/Utils/SymbolRewriter.h"
 
 using namespace llvm;
 
@@ -99,6 +100,10 @@ static cl::opt<bool> MISchedPostRA("misched-postra", cl::Hidden,
 static cl::opt<bool> EarlyLiveIntervals("early-live-intervals", cl::Hidden,
     cl::desc("Run live interval analysis earlier in the pipeline"));
 
+static cl::opt<bool> UseCFLAA("use-cfl-aa-in-codegen",
+  cl::init(false), cl::Hidden,
+  cl::desc("Enable the new, experimental CFL alias analysis in CodeGen"));
+
 /// Allow standard passes to be disabled by command line options. This supports
 /// simple binary flags that either suppress the pass or do nothing.
 /// i.e. -disable-mypass=false has no effect.
@@ -376,6 +381,8 @@ void TargetPassConfig::addIRPasses() {
   // Add TypeBasedAliasAnalysis before BasicAliasAnalysis so that
   // BasicAliasAnalysis wins if they disagree. This is intended to help
   // support "obvious" type-punning idioms.
+  if (UseCFLAA)
+    addPass(createCFLAliasAnalysisPass());
   addPass(createTypeBasedAliasAnalysisPass());
   addPass(createScopedNoAliasAAPass());
   addPass(createBasicAliasAnalysisPass());
@@ -422,7 +429,7 @@ void TargetPassConfig::addPassesToHandleExceptions() {
     // FALLTHROUGH
   case ExceptionHandling::DwarfCFI:
   case ExceptionHandling::ARM:
-  case ExceptionHandling::WinEH:
+  case ExceptionHandling::ItaniumWinEH:
     addPass(createDwarfEHPass(TM));
     break;
   case ExceptionHandling::None:
@@ -439,6 +446,7 @@ void TargetPassConfig::addPassesToHandleExceptions() {
 void TargetPassConfig::addCodeGenPrepare() {
   if (getOptLevel() != CodeGenOpt::None && !DisableCGP)
     addPass(createCodeGenPreparePass(TM));
+  addPass(createRewriteSymbolsPass());
 }
 
 /// Add common passes that perform LLVM IR to IR transforms in preparation for
@@ -684,6 +692,12 @@ FunctionPass *TargetPassConfig::createRegAllocPass(bool Optimized) {
   return createTargetRegisterAllocator(Optimized);
 }
 
+/// Return true if the default global register allocator is in use and
+/// has not be overriden on the command line with '-regalloc=...'
+bool TargetPassConfig::usingDefaultRegAlloc() const {
+  return RegAlloc.getNumOccurrences() == 0;
+}
+
 /// Add the minimum set of target-independent passes that are required for
 /// register allocation. No coalescing or scheduling.
 void TargetPassConfig::addFastRegAlloc(FunctionPass *RegAllocPass) {
@@ -718,6 +732,7 @@ void TargetPassConfig::addOptimizedRegAlloc(FunctionPass *RegAllocPass) {
 
   addPass(&TwoAddressInstructionPassID);
   addPass(&RegisterCoalescerID);
+  printAndVerify("After Register Coalescing");
 
   // PreRA instruction scheduling.
   if (addPass(&MachineSchedulerID))