From 0fd8ee4995193ba8dc24a19ae11cd2614418231a Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sat, 1 Jan 2011 20:39:18 +0000 Subject: [PATCH] turn on memset idiom recognition by default. Though there are still lots of limitations, this kicks in dozens of times in the 4 specfp2000 benchmarks, and hundreds of times in the int part. It also kicks in hundreds of times in multisource. This kicks in right before loop deletion, which has the pleasant effect of deleting loops that *just* do a memset. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122664 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Support/StandardPasses.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/llvm/Support/StandardPasses.h b/include/llvm/Support/StandardPasses.h index a608f2ceaba..7e32f1fbae7 100644 --- a/include/llvm/Support/StandardPasses.h +++ b/include/llvm/Support/StandardPasses.h @@ -145,6 +145,7 @@ namespace llvm { PM->add(createLoopUnswitchPass(OptimizeSize || OptimizationLevel < 3)); PM->add(createInstructionCombiningPass()); PM->add(createIndVarSimplifyPass()); // Canonicalize indvars + PM->add(createLoopIdiomPass()); // Recognize idioms like memset. PM->add(createLoopDeletionPass()); // Delete dead loops if (UnrollLoops) PM->add(createLoopUnrollPass()); // Unroll small loops -- 2.34.1