Changes in directory llvm/lib/CodeGen:
BranchFolding.cpp updated: 1.27 -> 1.28
---
Log message:
enable branch folding with an option
---
Diffs of the changes: (+2 -1)
BranchFolding.cpp | 3 ++-
1 files changed, 2 insertions(+), 1 deletion(-)
Index: llvm/lib/CodeGen/BranchFolding.cpp
diff -u llvm/lib/CodeGen/BranchFolding.cpp:1.27
llvm/lib/CodeGen/BranchFolding.cpp:1.28
--- llvm/lib/CodeGen/BranchFolding.cpp:1.27 Sun Oct 29 15:05:41 2006
+++ llvm/lib/CodeGen/BranchFolding.cpp Tue Oct 31 18:38:31 2006
@@ -30,6 +30,7 @@
static Statistic<> NumDeadBlocks("branchfold", "Number of dead blocks
removed");
static Statistic<> NumBranchOpts("branchfold", "Number of branches optimized");
static Statistic<> NumTailMerge ("branchfold", "Number of block tails merged");
+static cl::opt<bool> EnableTailMerge("enable-tail-merge", cl::Hidden);
namespace {
struct BranchFolder : public MachineFunctionPass {
@@ -258,7 +259,7 @@
bool BranchFolder::TailMergeBlocks(MachineFunction &MF) {
MadeChange = false;
- return false;
+ if (!EnableTailMerge) return false;
// Find blocks with no successors.
std::vector<std::pair<unsigned,MachineBasicBlock*> > MergePotentials;
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