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Reorder the contents of various getAnalysisUsage functions, eliminating

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a redundant loopsimplify run from the default -O2 sequence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108539 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-07-16 17:58:45 +00:00
parent 9c3d5e41b9
commit 1e381fcd55
4 changed files with 23 additions and 20 deletions
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4
lib/Transforms/Scalar/LICM.cpp
View File

@ -75,10 +75,10 @@ namespace {
///
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
AU.addRequiredID(LoopSimplifyID);
AU.addRequired<LoopInfo>();
AU.addRequired<DominatorTree>();
AU.addRequired<DominanceFrontier>(); // For scalar promotion (mem2reg)
AU.addRequired<LoopInfo>();
AU.addRequiredID(LoopSimplifyID);
AU.addRequired<AliasAnalysis>();
AU.addPreserved<ScalarEvolution>();
AU.addPreserved<DominanceFrontier>();

8
lib/Transforms/Scalar/LoopRotation.cpp
View File

@ -43,15 +43,15 @@ namespace {
// LCSSA form makes instruction renaming easier.
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addPreserved<DominatorTree>();
AU.addPreserved<DominanceFrontier>();
AU.addRequired<LoopInfo>();
AU.addPreserved<LoopInfo>();
AU.addRequiredID(LoopSimplifyID);
AU.addPreservedID(LoopSimplifyID);
AU.addRequiredID(LCSSAID);
AU.addPreservedID(LCSSAID);
AU.addPreserved<ScalarEvolution>();
AU.addRequired<LoopInfo>();
AU.addPreserved<LoopInfo>();
AU.addPreserved<DominatorTree>();
AU.addPreserved<DominanceFrontier>();
}
// Helper functions

18
lib/Transforms/Utils/LCSSA.cpp
View File

@ -64,22 +64,18 @@ namespace {
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
AU.addRequiredTransitive<DominatorTree>();
AU.addPreserved<DominatorTree>();
AU.addPreserved<DominanceFrontier>();
AU.addRequiredTransitive<LoopInfo>();
AU.addPreserved<LoopInfo>();
// LCSSA doesn't actually require LoopSimplify, but the PassManager
// doesn't know how to schedule LoopSimplify by itself.
AU.addRequiredID(LoopSimplifyID);
AU.addPreservedID(LoopSimplifyID);
AU.addRequiredTransitive<LoopInfo>();
AU.addPreserved<LoopInfo>();
AU.addRequiredTransitive<DominatorTree>();
AU.addPreserved<ScalarEvolution>();
AU.addPreserved<DominatorTree>();
// Request DominanceFrontier now, even though LCSSA does
// not use it. This allows Pass Manager to schedule Dominance
// Frontier early enough such that one LPPassManager can handle
// multiple loop transformation passes.
AU.addRequired<DominanceFrontier>();
AU.addPreserved<DominanceFrontier>();
AU.addPreserved<ScalarEvolution>();
}
private:
bool ProcessInstruction(Instruction *Inst,

13
lib/Transforms/Utils/LoopSimplify.cpp
View File

@ -77,12 +77,19 @@ namespace {
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
// We need loop information to identify the loops...
AU.addRequiredTransitive<LoopInfo>();
AU.addRequiredTransitive<DominatorTree>();
AU.addPreserved<LoopInfo>();
AU.addPreserved<DominatorTree>();
// Request DominanceFrontier now, even though LoopSimplify does
// not use it. This allows Pass Manager to schedule Dominance
// Frontier early enough such that one LPPassManager can handle
// multiple loop transformation passes.
AU.addRequired<DominanceFrontier>();
AU.addPreserved<DominanceFrontier>();
AU.addRequiredTransitive<LoopInfo>();
AU.addPreserved<LoopInfo>();
AU.addPreserved<AliasAnalysis>();
AU.addPreserved<ScalarEvolution>();
AU.addPreservedID(BreakCriticalEdgesID); // No critical edges added.