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//===- DeltaManager.cpp - Runs Delta Passes to reduce Input ---------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file calls each specialized Delta pass in order to reduce the input IR
// file.
//
//===----------------------------------------------------------------------===//
#include "DeltaManager.h"
#include "TestRunner.h"
#include "deltas/Delta.h"
#include "deltas/ReduceAliases.h"
#include "deltas/ReduceArguments.h"
#include "deltas/ReduceAttributes.h"
#include "deltas/ReduceBasicBlocks.h"
#include "deltas/ReduceFunctionBodies.h"
#include "deltas/ReduceFunctions.h"
#include "deltas/ReduceGlobalObjects.h"
#include "deltas/ReduceGlobalValues.h"
#include "deltas/ReduceGlobalVarInitializers.h"
#include "deltas/ReduceGlobalVars.h"
#include "deltas/ReduceInstructions.h"
#include "deltas/ReduceInstructionsMIR.h"
#include "deltas/ReduceMetadata.h"
#include "deltas/ReduceModuleData.h"
#include "deltas/ReduceOperandBundles.h"
#include "deltas/ReduceOperands.h"
#include "deltas/ReduceOperandsSkip.h"
#include "deltas/ReduceOperandsToArgs.h"
#include "deltas/ReduceSpecialGlobals.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
static cl::opt<std::string>
DeltaPasses("delta-passes",
cl::desc("Delta passes to run, separated by commas. By "
"default, run all delta passes."));
#define DELTA_PASSES \
DELTA_PASS("special-globals", reduceSpecialGlobalsDeltaPass) \
DELTA_PASS("aliases", reduceAliasesDeltaPass) \
DELTA_PASS("function-bodies", reduceFunctionBodiesDeltaPass) \
DELTA_PASS("functions", reduceFunctionsDeltaPass) \
DELTA_PASS("basic-blocks", reduceBasicBlocksDeltaPass) \
DELTA_PASS("global-values", reduceGlobalValuesDeltaPass) \
DELTA_PASS("global-objects", reduceGlobalObjectsDeltaPass) \
DELTA_PASS("global-initializers", reduceGlobalsInitializersDeltaPass) \
DELTA_PASS("global-variables", reduceGlobalsDeltaPass) \
DELTA_PASS("metadata", reduceMetadataDeltaPass) \
DELTA_PASS("arguments", reduceArgumentsDeltaPass) \
DELTA_PASS("instructions", reduceInstructionsDeltaPass) \
DELTA_PASS("operands-zero", reduceOperandsZeroDeltaPass) \
DELTA_PASS("operands-one", reduceOperandsOneDeltaPass) \
DELTA_PASS("operands-undef", reduceOperandsUndefDeltaPass) \
DELTA_PASS("operands-to-args", reduceOperandsToArgsDeltaPass) \
DELTA_PASS("operands-skip", reduceOperandsSkipDeltaPass) \
DELTA_PASS("operand-bundles", reduceOperandBundesDeltaPass) \
DELTA_PASS("attributes", reduceAttributesDeltaPass) \
DELTA_PASS("module-data", reduceModuleDataDeltaPass)
#define DELTA_PASSES_MIR \
DELTA_PASS("instructions", reduceInstructionsMIRDeltaPass)
static void runAllDeltaPasses(TestRunner &Tester) {
#define DELTA_PASS(NAME, FUNC) FUNC(Tester);
if (Tester.getProgram().isMIR()) {
DELTA_PASSES_MIR
} else {
DELTA_PASSES
}
#undef DELTA_PASS
}
static void runDeltaPassName(TestRunner &Tester, StringRef PassName) {
#define DELTA_PASS(NAME, FUNC) \
if (PassName == NAME) { \
FUNC(Tester); \
return; \
}
if (Tester.getProgram().isMIR()) {
DELTA_PASSES_MIR
} else {
DELTA_PASSES
}
#undef DELTA_PASS
errs() << "unknown pass \"" << PassName << "\"\n";
exit(1);
}
void llvm::printDeltaPasses(raw_ostream &OS) {
OS << "Delta passes (pass to `--delta-passes=` as a comma separated list):\n";
#define DELTA_PASS(NAME, FUNC) OS << " " << NAME << "\n";
OS << " IR:\n";
DELTA_PASSES
OS << " MIR:\n";
DELTA_PASSES_MIR
#undef DELTA_PASS
}
// FIXME: We might want to use a different metric than "number of
// bytes in serialized IR" to detect non-progress of the main delta
// loop
static int getIRSize(TestRunner &Tester) {
std::string Str;
raw_string_ostream SS(Str);
Tester.getProgram().print(SS, /*AnnotationWriter=*/nullptr);
return Str.length();
}
void llvm::runDeltaPasses(TestRunner &Tester, int MaxPassIterations) {
int OldSize = getIRSize(Tester);
for (int Iter = 0; Iter < MaxPassIterations; ++Iter) {
if (DeltaPasses.empty()) {
runAllDeltaPasses(Tester);
} else {
StringRef Passes = DeltaPasses;
while (!Passes.empty()) {
auto Split = Passes.split(",");
runDeltaPassName(Tester, Split.first);
Passes = Split.second;
}
}
int NewSize = getIRSize(Tester);
if (NewSize >= OldSize)
break;
OldSize = NewSize;
}
}
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