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Add a simple pass.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13820 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-05-27 06:13:36 +00:00
parent 9b2a184908
commit d9572118eb
2 changed files with 90 additions and 0 deletions
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45
tools/analyze/AnalysisWrappers.cpp
View File

@ -17,8 +17,10 @@
//
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/Pass.h"
#include "llvm/Analysis/InstForest.h"
#include "llvm/Support/CallSite.h"
using namespace llvm;
@ -38,3 +40,46 @@ namespace {
RegisterAnalysis<InstForestHelper> P1("instforest", "InstForest Printer");
}
namespace {
/// ExternalFunctionsPassedConstants - This pass prints out call sites to
/// external functions that are called with constant arguments. This can be
/// useful when looking for standard library functions we should constant fold
/// or handle in alias analyses.
struct ExternalFunctionsPassedConstants : public Pass {
virtual bool run(Module &M) {
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
if (I->isExternal()) {
bool PrintedFn = false;
for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
UI != E; ++UI)
if (Instruction *User = dyn_cast<Instruction>(*UI)) {
CallSite CS = CallSite::get(User);
if (CS.getInstruction()) {
for (CallSite::arg_iterator AI = CS.arg_begin(),
E = CS.arg_end(); AI != E; ++AI)
if (isa<Constant>(*AI)) {
if (!PrintedFn) {
std::cerr << "Function '" << I->getName() << "':\n";
PrintedFn = true;
}
std::cerr << *User;
break;
}
}
}
}
return false;
}
void print(std::ostream &OS) const {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
};
RegisterAnalysis<ExternalFunctionsPassedConstants>
P2("externalfnconstants", "Print external fn callsites passed constants");
}

45
tools/opt/AnalysisWrappers.cpp
View File

@ -17,8 +17,10 @@
//
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/Pass.h"
#include "llvm/Analysis/InstForest.h"
#include "llvm/Support/CallSite.h"
using namespace llvm;
@ -38,3 +40,46 @@ namespace {
RegisterAnalysis<InstForestHelper> P1("instforest", "InstForest Printer");
}
namespace {
/// ExternalFunctionsPassedConstants - This pass prints out call sites to
/// external functions that are called with constant arguments. This can be
/// useful when looking for standard library functions we should constant fold
/// or handle in alias analyses.
struct ExternalFunctionsPassedConstants : public Pass {
virtual bool run(Module &M) {
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
if (I->isExternal()) {
bool PrintedFn = false;
for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
UI != E; ++UI)
if (Instruction *User = dyn_cast<Instruction>(*UI)) {
CallSite CS = CallSite::get(User);
if (CS.getInstruction()) {
for (CallSite::arg_iterator AI = CS.arg_begin(),
E = CS.arg_end(); AI != E; ++AI)
if (isa<Constant>(*AI)) {
if (!PrintedFn) {
std::cerr << "Function '" << I->getName() << "':\n";
PrintedFn = true;
}
std::cerr << *User;
break;
}
}
}
}
return false;
}
void print(std::ostream &OS) const {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
};
RegisterAnalysis<ExternalFunctionsPassedConstants>
P2("externalfnconstants", "Print external fn callsites passed constants");
}