Add -O1, -O2 and -O3 that matches llvm-gcc's -O1, -O2 and -O3 respectively.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56255 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2008-09-16 22:25:14 +00:00
parent 50284d81f8
commit 2d7551ced2

View File

@ -13,6 +13,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/ModuleProvider.h"
#include "llvm/PassManager.h"
#include "llvm/CallGraphSCCPass.h"
#include "llvm/Bitcode/ReaderWriter.h"
@ -84,6 +85,26 @@ static cl::opt<bool>
StandardCompileOpts("std-compile-opts",
cl::desc("Include the standard compile time optimizations"));
static cl::opt<bool>
OptLevelO1("O1",
cl::desc("Optimization level 1. Similar to llvm-gcc -O1"));
static cl::opt<bool>
OptLevelO2("O2",
cl::desc("Optimization level 1. Similar to llvm-gcc -O2"));
static cl::opt<bool>
OptLevelO3("O3",
cl::desc("Optimization level 1. Similar to llvm-gcc -O3"));
static cl::opt<bool>
UnitAtATime("funit-at-a-time",
cl::desc("Enable IPO. This is same is llvm-gcc's -funit-at-a-time"));
static cl::opt<bool>
DisableSimplifyLibCalls("disable-simplify-libcalls",
cl::desc("Disable simplify libcalls"));
static cl::opt<bool>
Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
@ -237,6 +258,88 @@ inline void addPass(PassManager &PM, Pass *P) {
if (VerifyEach) PM.add(createVerifierPass());
}
/// AddOptimizationPasses - This routine adds optimization passes
/// based on selected optimization level, OptLevel. This routine
/// duplicates llvm-gcc behaviour.
///
/// OptLevel - Optimization Level
/// PruneEH - Add PruneEHPass, if set.
/// UnrollLoop - Unroll loops, if set.
void AddOptimizationPasses(PassManager &MPM, FunctionPassManager &FPM,
unsigned OptLevel) {
if (OptLevel == 0)
return;
FPM.add(createCFGSimplificationPass());
if (OptLevel == 1)
FPM.add(createPromoteMemoryToRegisterPass());
else
FPM.add(createScalarReplAggregatesPass());
FPM.add(createInstructionCombiningPass());
if (UnitAtATime)
MPM.add(createRaiseAllocationsPass()); // call %malloc -> malloc inst
MPM.add(createCFGSimplificationPass()); // Clean up disgusting code
MPM.add(createPromoteMemoryToRegisterPass()); // Kill useless allocas
if (UnitAtATime) {
MPM.add(createGlobalOptimizerPass()); // OptLevel out global vars
MPM.add(createGlobalDCEPass()); // Remove unused fns and globs
MPM.add(createIPConstantPropagationPass()); // IP Constant Propagation
MPM.add(createDeadArgEliminationPass()); // Dead argument elimination
}
MPM.add(createInstructionCombiningPass()); // Clean up after IPCP & DAE
MPM.add(createCFGSimplificationPass()); // Clean up after IPCP & DAE
if (UnitAtATime)
MPM.add(createPruneEHPass()); // Remove dead EH info
if (OptLevel > 1)
MPM.add(createFunctionInliningPass()); // Inline small functions
if (OptLevel > 2)
MPM.add(createArgumentPromotionPass()); // Scalarize uninlined fn args
if (!DisableSimplifyLibCalls)
MPM.add(createSimplifyLibCallsPass()); // Library Call Optimizations
MPM.add(createInstructionCombiningPass()); // Cleanup for scalarrepl.
MPM.add(createJumpThreadingPass()); // Thread jumps.
MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
MPM.add(createScalarReplAggregatesPass()); // Break up aggregate allocas
MPM.add(createInstructionCombiningPass()); // Combine silly seq's
MPM.add(createCondPropagationPass()); // Propagate conditionals
MPM.add(createTailCallEliminationPass()); // Eliminate tail calls
MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
MPM.add(createReassociatePass()); // Reassociate expressions
MPM.add(createLoopRotatePass()); // Rotate Loop
MPM.add(createLICMPass()); // Hoist loop invariants
MPM.add(createLoopUnswitchPass());
MPM.add(createLoopIndexSplitPass()); // Split loop index
MPM.add(createInstructionCombiningPass());
MPM.add(createIndVarSimplifyPass()); // Canonicalize indvars
MPM.add(createLoopDeletionPass()); // Delete dead loops
if (OptLevel > 1)
MPM.add(createLoopUnrollPass()); // Unroll small loops
MPM.add(createInstructionCombiningPass()); // Clean up after the unroller
MPM.add(createGVNPass()); // Remove redundancies
MPM.add(createMemCpyOptPass()); // Remove memcpy / form memset
MPM.add(createSCCPPass()); // Constant prop with SCCP
// Run instcombine after redundancy elimination to exploit opportunities
// opened up by them.
MPM.add(createInstructionCombiningPass());
MPM.add(createCondPropagationPass()); // Propagate conditionals
MPM.add(createDeadStoreEliminationPass()); // Delete dead stores
MPM.add(createAggressiveDCEPass()); // Delete dead instructions
MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
if (UnitAtATime) {
MPM.add(createStripDeadPrototypesPass()); // Get rid of dead prototypes
MPM.add(createDeadTypeEliminationPass()); // Eliminate dead types
}
if (OptLevel > 1 && UnitAtATime)
MPM.add(createConstantMergePass()); // Merge dup global constants
return;
}
void AddStandardCompilePasses(PassManager &PM) {
PM.add(createVerifierPass()); // Verify that input is correct
@ -378,6 +481,12 @@ int main(int argc, char **argv) {
// Add an appropriate TargetData instance for this module...
Passes.add(new TargetData(M.get()));
FunctionPassManager *FPasses = NULL;
if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
FPasses = new FunctionPassManager(new ExistingModuleProvider(M.get()));
FPasses->add(new TargetData(M.get()));
}
// If the -strip-debug command line option was specified, add it. If
// -std-compile-opts was also specified, it will handle StripDebug.
if (StripDebug && !StandardCompileOpts)
@ -393,6 +502,21 @@ int main(int argc, char **argv) {
StandardCompileOpts = false;
}
if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
AddOptimizationPasses(Passes, *FPasses, 1);
OptLevelO1 = false;
}
if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
AddOptimizationPasses(Passes, *FPasses, 2);
OptLevelO2 = false;
}
if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {
AddOptimizationPasses(Passes, *FPasses, 3);
OptLevelO3 = false;
}
const PassInfo *PassInf = PassList[i];
Pass *P = 0;
if (PassInf->getNormalCtor())
@ -427,6 +551,24 @@ int main(int argc, char **argv) {
StandardCompileOpts = false;
}
if (OptLevelO1) {
AddOptimizationPasses(Passes, *FPasses, 1);
}
if (OptLevelO2) {
AddOptimizationPasses(Passes, *FPasses, 2);
}
if (OptLevelO3) {
AddOptimizationPasses(Passes, *FPasses, 3);
}
if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
for (Module::iterator I = M.get()->begin(), E = M.get()->end();
I != E; ++I)
FPasses->run(*I);
}
// Check that the module is well formed on completion of optimization
if (!NoVerify && !VerifyEach)
Passes.add(createVerifierPass());