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IPRA: Exit early on functions without calls 

llvm-svn: 311636
This commit is contained in:
Matt Arsenault 2017-08-24 07:55:13 +00:00
parent 046a969360
commit 00459e4a06
1 changed files with 5 additions and 0 deletions
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5
llvm/lib/CodeGen/RegUsageInfoPropagate.cpp
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@ -21,6 +21,7 @@
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/Passes.h"
@ -95,6 +96,10 @@ bool RegUsageInfoPropagationPass::runOnMachineFunction(MachineFunction &MF) {
<< " ++++++++++++++++++++ \n");
DEBUG(dbgs() << "MachineFunction : " << MF.getName() << "\n");
const MachineFrameInfo &MFI = MF.getFrameInfo();
if (!MFI.hasCalls() && !MFI.hasTailCall())
return false;
bool Changed = false;
for (MachineBasicBlock &MBB : MF) {