[PowerPC] Really iterate over all loops in PPCLoopDataPrefetch/PPCLoopPreIncPrep

[oota-llvm.git] / lib / Target / PowerPC / PPCLoopDataPrefetch.cpp

diff --git a/lib/Target/PowerPC/PPCLoopDataPrefetch.cpp b/lib/Target/PowerPC/PPCLoopDataPrefetch.cpp
index 77d3727c303d5d9f9bd03c1027c8f720f1b92f0e..2947c6617bd26025a58ce5884f9a0bd8c88c83a1 100644 (file)
--- a/lib/Target/PowerPC/PPCLoopDataPrefetch.cpp
+++ b/lib/Target/PowerPC/PPCLoopDataPrefetch.cpp
@@ -111,13 +111,9 @@ bool PPCLoopDataPrefetch::runOnFunction(Function &F) {
 
   bool MadeChange = false;
 
-  if (LI->empty())
-    return MadeChange;
-
-  for (auto I = df_begin(*LI->begin()), E = df_end(*LI->begin()); I != E; ++I) {
-    Loop *L = *I;
-    MadeChange |= runOnLoop(L);
-  }
+  for (auto I = LI->begin(), IE = LI->end(); I != IE; ++I)
+    for (auto L = df_begin(*I), LE = df_end(*I); L != LE; ++L)
+      MadeChange |= runOnLoop(*L);
 
   return MadeChange;
 }