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Enable tail merging by default.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31140 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-10-23 22:10:12 +00:00
parent 2cd931fee5
commit a4bcfe12d1
1 changed files with 0 additions and 4 deletions
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4
lib/CodeGen/BranchFolding.cpp
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@ -30,7 +30,6 @@ using namespace llvm;
static Statistic<> NumDeadBlocks("branchfold", "Number of dead blocks removed"); static Statistic<> NumDeadBlocks("branchfold", "Number of dead blocks removed");
static Statistic<> NumBranchOpts("branchfold", "Number of branches optimized"); static Statistic<> NumBranchOpts("branchfold", "Number of branches optimized");
static Statistic<> NumTailMerge ("branchfold", "Number of block tails merged"); static Statistic<> NumTailMerge ("branchfold", "Number of block tails merged");
static cl::opt<bool> EnableTailMerge("enable-tail-merge", cl::init(false));
namespace { namespace {
struct BranchFolder : public MachineFunctionPass { struct BranchFolder : public MachineFunctionPass {
@ -207,9 +206,6 @@ void BranchFolder::ReplaceTailWithBranchTo(MachineBasicBlock::iterator OldInst,
bool BranchFolder::TailMergeBlocks(MachineFunction &MF) { bool BranchFolder::TailMergeBlocks(MachineFunction &MF) {
MadeChange = false; MadeChange = false;
if (!EnableTailMerge)
return false;
// Find blocks with no successors. // Find blocks with no successors.
std::vector<std::pair<unsigned,MachineBasicBlock*> > MergePotentials; std::vector<std::pair<unsigned,MachineBasicBlock*> > MergePotentials;
for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) { for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) {