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Speed up the cbu pass from taking somewhere near the age of the universe to about 90s on povray

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12123 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-03-04 19:16:35 +00:00
parent 323819e4e1
commit da5c5a5b95
1 changed files with 28 additions and 6 deletions
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34
lib/Analysis/DataStructure/CompleteBottomUp.cpp
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@ -16,13 +16,16 @@
#include "llvm/Analysis/DataStructure.h"
#include "llvm/Module.h"
#include "llvm/Analysis/DSGraph.h"
#include "Support/Debug.h"
#include "Support/SCCIterator.h"
#include "Support/Statistic.h"
#include "Support/STLExtras.h"
using namespace llvm;
namespace {
RegisterAnalysis<CompleteBUDataStructures>
X("cbudatastructure", "'Complete' Bottom-up Data Structure Analysis");
Statistic<> NumCBUInlines("cbudatastructures", "Number of graphs inlined");
}
@ -168,26 +171,45 @@ unsigned CompleteBUDataStructures::calculateSCCGraphs(DSGraph &FG,
/// processGraph - Process the BU graphs for the program in bottom-up order on
/// the SCC of the __ACTUAL__ call graph. This builds "complete" BU graphs.
void CompleteBUDataStructures::processGraph(DSGraph &G) {
hash_set<Instruction*> calls;
// The edges out of the current node are the call site targets...
for (unsigned i = 0, e = G.getFunctionCalls().size(); i != e; ++i) {
const DSCallSite &CS = G.getFunctionCalls()[i];
Instruction *TheCall = CS.getCallSite().getInstruction();
assert(calls.insert(TheCall).second &&
"Call instruction occurs multiple times in graph??");
// The Normal BU pass will have taken care of direct calls well already,
// don't worry about them.
// FIXME: if a direct callee had indirect callees, it seems like they could
// be updated and we would have to reinline even direct calls!
if (!CS.getCallSite().getCalledFunction()) {
// Loop over all of the actually called functions...
ActualCalleesTy::iterator I, E;
for (tie(I, E) = ActualCallees.equal_range(TheCall); I != E; ++I) {
tie(I, E) = ActualCallees.equal_range(TheCall);
unsigned TNum = 0, Num = std::distance(I, E);
for (; I != E; ++I, ++TNum) {
Function *CalleeFunc = I->second;
if (!CalleeFunc->isExternal()) {
// Merge the callee's graph into this graph. This works for normal
// calls or for self recursion within an SCC.
G.mergeInGraph(CS, *CalleeFunc, getOrCreateGraph(*CalleeFunc),
DSGraph::KeepModRefBits |
DSGraph::StripAllocaBit |
DSGraph::DontCloneCallNodes);
DSGraph &GI = getOrCreateGraph(*CalleeFunc);
++NumCBUInlines;
G.mergeInGraph(CS, *CalleeFunc, GI, DSGraph::KeepModRefBits |
DSGraph::StripAllocaBit | DSGraph::DontCloneCallNodes |
DSGraph::DontCloneAuxCallNodes);
DEBUG(std::cerr << " Inlining graph [" << i << "/" << e-1
<< ":" << TNum << "/" << Num-1 << "] for "
<< CalleeFunc->getName() << "["
<< GI.getGraphSize() << "+" << GI.getAuxFunctionCalls().size()
<< "] into '" /*<< G.getFunctionNames()*/ << "' ["
<< G.getGraphSize() << "+" << G.getAuxFunctionCalls().size()
<< "]\n");
}
}
}
@ -200,5 +222,5 @@ void CompleteBUDataStructures::processGraph(DSGraph &G) {
// Delete dead nodes. Treat globals that are unreachable but that can
// reach live nodes as live.
G.removeDeadNodes(DSGraph::KeepUnreachableGlobals);
G.removeDeadNodes(DSGraph::RemoveUnreachableGlobals);
}