Add peephole optimization pass at the end of code generation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3846 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp
index 84149f8..8d9a832 100644
--- a/lib/Target/TargetMachine.cpp
+++ b/lib/Target/TargetMachine.cpp
@@ -12,6 +12,7 @@
#include "llvm/CodeGen/InstrSelection.h"
#include "llvm/CodeGen/InstrScheduling.h"
#include "llvm/CodeGen/RegisterAllocation.h"
+#include "llvm/CodeGen/PeepholeOpts.h"
#include "llvm/CodeGen/MachineCodeForMethod.h"
#include "llvm/CodeGen/MachineCodeForInstruction.h"
#include "llvm/Reoptimizer/Mapping/MappingInfo.h"
@@ -32,6 +33,9 @@
static cl::opt<bool> DisableSched("nosched",
cl::desc("Disable local scheduling pass"));
+static cl::opt<bool> DisablePeephole("nopeephole",
+ cl::desc("Disable peephole optimization pass"));
+
//---------------------------------------------------------------------------
// class TargetMachine
//
@@ -132,13 +136,11 @@
PM.add(getRegisterAllocator(*this));
- //PM.add(new OptimizeLeafProcedures());
- //PM.add(new DeleteFallThroughBranches());
- //PM.add(new RemoveChainedBranches()); // should be folded with previous
- //PM.add(new RemoveRedundantOps()); // operations with %g0, NOP, etc.
-
PM.add(getPrologEpilogInsertionPass());
+ if (!DisablePeephole)
+ PM.add(createPeepholeOptsPass(*this));
+
PM.add(MappingInfoForFunction(Out));
// Output assembly language to the .s file. Assembly emission is split into