From db95fa131a229652f925794ca7a5b84e9490050b Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Fri, 20 Mar 2009 20:42:23 +0000
Subject: [PATCH] Simplify this code; use a while instead of an if and a
 do-while.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67400 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
index ea9f47bf318..967a8cef8e1 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
@@ -105,18 +105,15 @@ void ScheduleDAGSDNodes::BuildSchedUnits() {
     
     // See if anything is flagged to this node, if so, add them to flagged
     // nodes.  Nodes can have at most one flag input and one flag output.  Flags
-    // are required the be the last operand and result of a node.
+    // are required to be the last operand and result of a node.
     
     // Scan up to find flagged preds.
     SDNode *N = NI;
-    if (N->getNumOperands() &&
-        N->getOperand(N->getNumOperands()-1).getValueType() == MVT::Flag) {
-      do {
-        N = N->getOperand(N->getNumOperands()-1).getNode();
-        assert(N->getNodeId() == -1 && "Node already inserted!");
-        N->setNodeId(NodeSUnit->NodeNum);
-      } while (N->getNumOperands() &&
-               N->getOperand(N->getNumOperands()-1).getValueType()== MVT::Flag);
+    while (N->getNumOperands() &&
+           N->getOperand(N->getNumOperands()-1).getValueType() == MVT::Flag) {
+      N = N->getOperand(N->getNumOperands()-1).getNode();
+      assert(N->getNodeId() == -1 && "Node already inserted!");
+      N->setNodeId(NodeSUnit->NodeNum);
     }
     
     // Scan down to find any flagged succs.