[LLVMdev] Segmented Stacks (re-roll)

[Sanjoy Das]

Hi!
> According to the patch you send, the pass is not doing anything:
> 
> +bool StackSegmenter::runOnMachineFunction(MachineFunction &MF) {
> +  return false;
> +}
> +

It is, in the next patch.

diff --git a/lib/CodeGen/StackSegmenter.cpp b/lib/CodeGen/StackSegmenter.cpp
index 5ffb8f2..cc2ca87 100644
--- a/lib/CodeGen/StackSegmenter.cpp
+++ b/lib/CodeGen/StackSegmenter.cpp
@@ -40,7 +40,10 @@ void StackSegmenter::getAnalysisUsage(AnalysisUsage
&info) const {
 }

 bool StackSegmenter::runOnMachineFunction(MachineFunction &MF) {
-  return false;
+  const TargetFrameLowering &TFI = *MF.getTarget().getFrameLowering();
+  TFI.adjustForSegmentedStacks(MF);
+  // adjustForSegmentedStacks always changes the MachineFunction
+  return true;
 }

 FunctionPass *llvm::createStackSegmenter() {

-- 
Sanjoy Das
http://playingwithpointers.com