//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Reid Spencer and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/PassManager.h"
#include "llvm/Analysis/LoadValueNumbering.h"
#include "llvm/Analysis/Passes.h"
+#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/System/DynamicLibrary.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Support/PassNameParser.h"
#include "llvm/Support/PluginLoader.h"
+#include <iostream>
using namespace llvm;
// Pass Name Options as generated by the PassNameParser
-static cl::list<const PassInfo*, bool,
- FilteredPassNameParser<PassInfo::Optimization> >
+static cl::list<const PassInfo*, bool, PassNameParser>
OptimizationList(cl::desc("Optimizations available:"));
+//Don't verify at the end
+static cl::opt<bool> DontVerify("disable-verify", cl::ReallyHidden);
+
// Optimization Enumeration
enum OptimizationLevels {
OPT_FAST_COMPILE = 1,
static cl::opt<bool> VerifyEach("verify-each",
cl::desc("Verify intermediate results of all passes"));
-static cl::opt<bool> Strip("s",
- cl::desc("Strip symbol info from executable"));
-
static cl::alias ExportDynamic("export-dynamic",
cl::aliasopt(DisableInternalize),
cl::desc("Alias for -disable-internalize"));
+static cl::opt<bool> Strip("strip-all",
+ cl::desc("Strip all symbol info from executable"));
+
+static cl::alias A0("s", cl::desc("Alias for --strip-all"),
+ cl::aliasopt(Strip));
+
+static cl::opt<bool> StripDebug("strip-debug",
+ cl::desc("Strip debugger symbol info from executable"));
+
+static cl::alias A1("S", cl::desc("Alias for --strip-debug"),
+ cl::aliasopt(StripDebug));
+
// A utility function that adds a pass to the pass manager but will also add
// a verifier pass after if we're supposed to verify.
static inline void addPass(PassManager &PM, Pass *P) {
// Add an appropriate TargetData instance for this module...
addPass(Passes, new TargetData(M));
- // Often if the programmer does not specify proper prototypes for the
- // functions they are calling, they end up calling a vararg version of the
- // function that does not get a body filled in (the real function has typed
- // arguments). This pass merges the two functions.
- addPass(Passes, createFunctionResolvingPass());
-
if (!DisableOptimizations) {
// Now that composite has been compiled, scan through the module, looking
// for a main function. If main is defined, mark all other functions
// internal.
- addPass(Passes, createInternalizePass(!DisableInternalize));
+ if (!DisableInternalize)
+ addPass(Passes, createInternalizePass(true));
+
+ // Propagate constants at call sites into the functions they call. This
+ // opens opportunities for globalopt (and inlining) by substituting function
+ // pointers passed as arguments to direct uses of functions.
+ addPass(Passes, createIPSCCPPass());
// Now that we internalized some globals, see if we can hack on them!
addPass(Passes, createGlobalOptimizerPass());
// keep one copy of each constant...
addPass(Passes, createConstantMergePass());
- // If the -s command line option was specified, strip the symbols out of the
- // resulting program to make it smaller. -s is a GLD option that we are
- // supporting.
- if (Strip)
- addPass(Passes, createStripSymbolsPass());
-
- // Propagate constants at call sites into the functions they call.
- addPass(Passes, createIPConstantPropagationPass());
-
// Remove unused arguments from functions...
addPass(Passes, createDeadArgEliminationPass());
+ // Reduce the code after globalopt and ipsccp. Both can open up significant
+ // simplification opportunities, and both can propagate functions through
+ // function pointers. When this happens, we often have to resolve varargs
+ // calls, etc, so let instcombine do this.
+ addPass(Passes, createInstructionCombiningPass());
+
if (!DisableInline)
addPass(Passes, createFunctionInliningPass()); // Inline small functions
addPass(Passes, createPruneEHPass()); // Remove dead EH info
+ addPass(Passes, createGlobalOptimizerPass()); // Optimize globals again.
addPass(Passes, createGlobalDCEPass()); // Remove dead functions
// If we didn't decide to inline a function, check to see if we can
// The IPO passes may leave cruft around. Clean up after them.
addPass(Passes, createInstructionCombiningPass());
-
+ addPass(Passes, createJumpThreadingPass()); // Thread jumps.
addPass(Passes, createScalarReplAggregatesPass()); // Break up allocas
- // Run a few AA driven optimizations, to cleanup the code.
+ // Run a few AA driven optimizations here and now, to cleanup the code.
addPass(Passes, createGlobalsModRefPass()); // IP alias analysis
+
addPass(Passes, createLICMPass()); // Hoist loop invariants
- addPass(Passes, createLoadValueNumberingPass()); // GVN for load instrs
- addPass(Passes, createGCSEPass()); // Remove common subexprs
+ addPass(Passes, createGVNPass()); // Remove redundancies
+ addPass(Passes, createMemCpyOptPass()); // Remove dead memcpy's
addPass(Passes, createDeadStoreEliminationPass()); // Nuke dead stores
// Cleanup and simplify the code after the scalar optimizations.
addPass(Passes, createInstructionCombiningPass());
+ addPass(Passes, createJumpThreadingPass()); // Thread jumps.
+
// Delete basic blocks, which optimization passes may have killed...
addPass(Passes, createCFGSimplificationPass());
addPass(Passes, createGlobalDCEPass());
}
+ // If the -s or -S command line options were specified, strip the symbols out
+ // of the resulting program to make it smaller. -s and -S are GNU ld options
+ // that we are supporting; they alias -strip-all and -strip-debug.
+ if (Strip || StripDebug)
+ addPass(Passes, createStripSymbolsPass(StripDebug && !Strip));
+
// Create a new optimization pass for each one specified on the command line
std::auto_ptr<TargetMachine> target;
for (unsigned i = 0; i < OptimizationList.size(); ++i) {
const PassInfo *Opt = OptimizationList[i];
-
if (Opt->getNormalCtor())
- Passes.add(Opt->getNormalCtor()());
- else if (Opt->getTargetCtor()) {
- assert(target.get() && "Could not allocate target machine!");
- Passes.add(Opt->getTargetCtor()(*target.get()));
- } else
+ addPass(Passes, Opt->getNormalCtor()());
+ else
std::cerr << "llvm-ld: cannot create pass: " << Opt->getPassName()
<< "\n";
}
if (!DisableOptimizations) {
addPass(Passes, createInstructionCombiningPass());
addPass(Passes, createCFGSimplificationPass());
+ addPass(Passes, createDeadCodeEliminationPass());
addPass(Passes, createGlobalDCEPass());
}
// Make sure everything is still good.
- Passes.add(createVerifierPass());
+ if (!DontVerify)
+ Passes.add(createVerifierPass());
// Run our queue of passes all at once now, efficiently.
Passes.run(*M);
projects / oota-llvm.git / blobdiff