[llvm] r311636 - IPRA: Exit early on functions without calls

[Matt Arsenault via llvm-commits]

Author: arsenm
Date: Thu Aug 24 00:55:13 2017
New Revision: 311636

URL: http://llvm.org/viewvc/llvm-project?rev=311636&view=rev
Log:
IPRA: Exit early on functions without calls

Modified:
    llvm/trunk/lib/CodeGen/RegUsageInfoPropagate.cpp

Modified: llvm/trunk/lib/CodeGen/RegUsageInfoPropagate.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/RegUsageInfoPropagate.cpp?rev=311636&r1=311635&r2=311636&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/RegUsageInfoPropagate.cpp (original)
+++ llvm/trunk/lib/CodeGen/RegUsageInfoPropagate.cpp Thu Aug 24 00:55:13 2017
@@ -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::runOnM
                << " ++++++++++++++++++++  \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) {