[llvm-commits] [llvm] r112420 - /llvm/trunk/include/llvm/Support/StandardPasses.h

[Chris Lattner]

Author: lattner
Date: Sun Aug 29 02:05:51 2010
New Revision: 112420

URL: http://llvm.org/viewvc/llvm-project?rev=112420&view=rev
Log:
Stop explicitly scheduling domfrontier before the loop passes,
since none of them use it.  With this, we now only run 
domfrontier (an N^2 analysis) 3 times at clang -O3: once for 
"early" per-function cleanup, once at the start of the
per-function pipeline to support SRoA, and once late because
the EHPrepare class uses it.

EHPrepare needs to stop using it, this is silly and wasteful.

Modified:
    llvm/trunk/include/llvm/Support/StandardPasses.h

Modified: llvm/trunk/include/llvm/Support/StandardPasses.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/StandardPasses.h?rev=112420&r1=112419&r2=112420&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/StandardPasses.h (original)
+++ llvm/trunk/include/llvm/Support/StandardPasses.h Sun Aug 29 02:05:51 2010
@@ -117,7 +117,6 @@
       PM->add(createArgumentPromotionPass());   // Scalarize uninlined fn args
     
     // Start of function pass.
-    
     PM->add(createScalarReplAggregatesPass());  // Break up aggregate allocas
     if (SimplifyLibCalls)
       PM->add(createSimplifyLibCallsPass());    // Library Call Optimizations
@@ -129,8 +128,6 @@
     PM->add(createTailCallEliminationPass());   // Eliminate tail calls
     PM->add(createCFGSimplificationPass());     // Merge & remove BBs
     PM->add(createReassociatePass());           // Reassociate expressions
-    // Explicitly schedule this to ensure that it runs before any loop pass.
-    PM->add(new DominanceFrontier());           // Calculate Dominance Frontiers
     PM->add(createLoopRotatePass());            // Rotate Loop
     PM->add(createLICMPass());                  // Hoist loop invariants
     PM->add(createLoopUnswitchPass(OptimizeSize || OptimizationLevel < 3));