[llvm] r255497 - [PPC] Early exit loop. NFC.

[Chad Rosier via llvm-commits]

Author: mcrosier
Date: Mon Dec 14 08:44:06 2015
New Revision: 255497

URL: http://llvm.org/viewvc/llvm-project?rev=255497&view=rev
Log:
[PPC] Early exit loop. NFC.

Modified:
    llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp

Modified: llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp?rev=255497&r1=255496&r2=255497&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp Mon Dec 14 08:44:06 2015
@@ -10801,8 +10801,11 @@ unsigned PPCTargetLowering::getPrefLoopA
     // boundary so that the entire loop fits in one instruction-cache line.
     uint64_t LoopSize = 0;
     for (auto I = ML->block_begin(), IE = ML->block_end(); I != IE; ++I)
-      for (auto J = (*I)->begin(), JE = (*I)->end(); J != JE; ++J)
+      for (auto J = (*I)->begin(), JE = (*I)->end(); J != JE; ++J) {
         LoopSize += TII->GetInstSizeInBytes(J);
+        if (LoopSize > 32)
+          break;
+      }
 
     if (LoopSize > 16 && LoopSize <= 32)
       return 5;