From eb4774a972af4bdd36d8795625c8c5d96ca507d1 Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Sat, 16 Feb 2013 17:06:38 +0000
Subject: [PATCH] Replace erase loop with std::remove_if.

This avoids unnecessary copies. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175367 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/RegisterPressure.cpp | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/lib/CodeGen/RegisterPressure.cpp b/lib/CodeGen/RegisterPressure.cpp
index 62e95aadc00..97f22e1049f 100644
--- a/lib/CodeGen/RegisterPressure.cpp
+++ b/lib/CodeGen/RegisterPressure.cpp
@@ -357,15 +357,14 @@ protected:
 /// Collect physical and virtual register operands.
 static void collectOperands(const MachineInstr *MI,
                             RegisterOperands &RegOpers) {
-  for(ConstMIBundleOperands OperI(MI); OperI.isValid(); ++OperI)
+  for (ConstMIBundleOperands OperI(MI); OperI.isValid(); ++OperI)
     RegOpers.collect(*OperI);
 
   // Remove redundant physreg dead defs.
-  for (unsigned i = RegOpers.DeadDefs.size(); i > 0; --i) {
-    unsigned Reg = RegOpers.DeadDefs[i-1];
-    if (containsReg(RegOpers.Defs, Reg))
-      RegOpers.DeadDefs.erase(&RegOpers.DeadDefs[i-1]);
-  }
+  SmallVectorImpl<unsigned>::iterator I =
+    std::remove_if(RegOpers.DeadDefs.begin(), RegOpers.DeadDefs.end(),
+                   std::bind1st(std::ptr_fun(containsReg), RegOpers.Defs));
+  RegOpers.DeadDefs.erase(I, RegOpers.DeadDefs.end());
 }
 
 /// Force liveness of registers.