[PPC] Replace debug value skipping with getLastNonDebugInstr.

No functionality change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240641 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index d3bb7a63c6227f02b0023b4bb0e375d8b386698e..696a83860e53fb48780c3ddfb8ee58bb1348fff9 100644 (file)
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -352,15 +352,10 @@ bool PPCInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB,
   bool isPPC64 = Subtarget.isPPC64();
 
   // If the block has no terminators, it just falls into the block after it.
-  MachineBasicBlock::iterator I = MBB.end();
-  if (I == MBB.begin())
+  MachineBasicBlock::iterator I = MBB.getLastNonDebugInstr();
+  if (I == MBB.end())
     return false;
-  --I;
-  while (I->isDebugValue()) {
-    if (I == MBB.begin())
-      return false;
-    --I;
-  }
+
   if (!isUnpredicatedTerminator(I))
     return false;
 
@@ -513,14 +508,10 @@ bool PPCInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB,
 }
 
 unsigned PPCInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
-  MachineBasicBlock::iterator I = MBB.end();
-  if (I == MBB.begin()) return 0;
-  --I;
-  while (I->isDebugValue()) {
-    if (I == MBB.begin())
-      return 0;
-    --I;
-  }
+  MachineBasicBlock::iterator I = MBB.getLastNonDebugInstr();
+  if (I == MBB.end())
+    return 0;
+
   if (I->getOpcode() != PPC::B && I->getOpcode() != PPC::BCC &&
       I->getOpcode() != PPC::BC && I->getOpcode() != PPC::BCn &&
       I->getOpcode() != PPC::BDNZ8 && I->getOpcode() != PPC::BDNZ &&