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I forgot to provide dominance frontier information. Now it's available.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1741 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-02-12 18:27:41 +00:00
parent eeeaf52ab6
commit 71b9411b8c
1 changed files with 24 additions and 5 deletions
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29
lib/Transforms/Utils/PromoteMemoryToRegister.cpp
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@ -18,12 +18,15 @@
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Scalar/PromoteMemoryToRegister.h"
#include "llvm/Analysis/Dominators.h"
#include "llvm/iMemory.h"
#include "llvm/Pass.h"
#include "llvm/Method.h"
#include "llvm/Assembly/Writer.h" // For debugging
using cfg::DominanceFrontier;
// PromotePass - This class is implements the PromoteMemoryToRegister pass
//
class PromotePass : public MethodPass {
public:
// runOnMethod - To run this pass, first we calculate the alloca instructions
@ -33,14 +36,27 @@ public:
std::vector<AllocaInst*> Allocas;
findSafeAllocas(M, Allocas); // Calculate safe allocas
// Get dominance frontier information...
DominanceFrontier &DF = getAnalysis<DominanceFrontier>();
// Transform each alloca in turn...
for (std::vector<AllocaInst*>::iterator I = Allocas.begin(),
E = Allocas.end(); I != E; ++I)
promoteAlloca(*I);
promoteAlloca(*I, DF);
return !Allocas.empty();
}
// getAnalysisUsageInfo - We need dominance frontiers
//
virtual void getAnalysisUsageInfo(Pass::AnalysisSet &Requires,
Pass::AnalysisSet &Destroyed,
Pass::AnalysisSet &Provided) {
Requires.push_back(DominanceFrontier::ID);
}
private:
// findSafeAllocas - Find allocas that are safe to promote
//
void findSafeAllocas(Method *M, std::vector<AllocaInst*> &Allocas) const;
@ -48,7 +64,7 @@ public:
// promoteAlloca - Convert the use chain of an alloca instruction into
// register references.
//
void promoteAlloca(AllocaInst *AI);
void promoteAlloca(AllocaInst *AI, DominanceFrontier &DF);
};
@ -79,15 +95,18 @@ void PromotePass::findSafeAllocas(Method *M,
}
// promoteAlloca - Convert the use chain of an alloca instruction into
// register references.
//
void PromotePass::promoteAlloca(AllocaInst *AI) {
void PromotePass::promoteAlloca(AllocaInst *AI, DominanceFrontier &DFInfo) {
cerr << "TODO: Should process: " << AI;
}
// newPromoteMemoryToRegister - Provide an entry point to create this pass.
//
Pass *newPromoteMemoryToRegister() {
return new PromotePass();
}