e24b390dbc
Try to insert an implicit_def to replace the instruction's value, replacing the original instruction's def with a dead register. If all defs are delete the instruction entirely. This is pretty similar to the instruction reduction, but leaves the new defs in the same place as the original instruction. This could possibly replace it. I'm not sure if we should directly delete the instructions here, or leave dead ones behind. This could also further work to replace physical register defs.
149 lines
6.4 KiB
C++
149 lines
6.4 KiB
C++
//===- 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 "ReducerWorkItem.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/ReduceIRReferences.h"
|
|
#include "deltas/ReduceInstructionFlagsMIR.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/ReduceRegisterDefs.h"
|
|
#include "deltas/ReduceRegisterMasks.h"
|
|
#include "deltas/ReduceRegisterUses.h"
|
|
#include "deltas/ReduceSpecialGlobals.h"
|
|
#include "deltas/ReduceVirtualRegisters.h"
|
|
#include "deltas/SimplifyInstructions.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
|
|
using namespace llvm;
|
|
|
|
extern cl::OptionCategory LLVMReduceOptions;
|
|
static cl::opt<std::string>
|
|
DeltaPasses("delta-passes",
|
|
cl::desc("Delta passes to run, separated by commas. By "
|
|
"default, run all delta passes."),
|
|
cl::cat(LLVMReduceOptions));
|
|
|
|
#define DELTA_PASSES \
|
|
do { \
|
|
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("simplify-instructions", simplifyInstructionsDeltaPass) \
|
|
DELTA_PASS("operands-zero", reduceOperandsZeroDeltaPass) \
|
|
DELTA_PASS("operands-one", reduceOperandsOneDeltaPass) \
|
|
DELTA_PASS("operands-nan", reduceOperandsNaNDeltaPass) \
|
|
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) \
|
|
} while (false)
|
|
|
|
#define DELTA_PASSES_MIR \
|
|
do { \
|
|
DELTA_PASS("instructions", reduceInstructionsMIRDeltaPass) \
|
|
DELTA_PASS("ir-instruction-references", \
|
|
reduceIRInstructionReferencesDeltaPass) \
|
|
DELTA_PASS("ir-block-references", reduceIRBlockReferencesDeltaPass) \
|
|
DELTA_PASS("ir-function-references", reduceIRFunctionReferencesDeltaPass) \
|
|
DELTA_PASS("instruction-flags", reduceInstructionFlagsMIRDeltaPass) \
|
|
DELTA_PASS("register-uses", reduceRegisterUsesMIRDeltaPass) \
|
|
DELTA_PASS("register-defs", reduceRegisterDefsMIRDeltaPass) \
|
|
DELTA_PASS("register-hints", reduceVirtualRegisterHintsDeltaPass) \
|
|
DELTA_PASS("register-masks", reduceRegisterMasksMIRDeltaPass) \
|
|
} while (false)
|
|
|
|
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
|
|
}
|
|
|
|
void llvm::runDeltaPasses(TestRunner &Tester, int MaxPassIterations) {
|
|
uint64_t OldComplexity = Tester.getProgram().getComplexityScore();
|
|
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;
|
|
}
|
|
}
|
|
uint64_t NewComplexity = Tester.getProgram().getComplexityScore();
|
|
if (NewComplexity >= OldComplexity)
|
|
break;
|
|
OldComplexity = NewComplexity;
|
|
}
|
|
}
|