dd71b65ca8
Instead of setting operands to undef as the "operands" pass does,
convert the operands to a function argument. This avoids having to
introduce undef values into the IR which have some unpredictability
during optimizations.
For instance,
define void @func() {
entry:
%val = add i32 32, 21
store i32 %val, i32* null
ret void
}
is reduced to
define void @func(i32 %val) {
entry:
%val1 = add i32 32, 21
store i32 %val, i32* null
ret void
}
(note that the instruction %val is renamed to %val1 when printing
the IR to avoid ambiguity; ideally %val1 would be removed by dce or the
instruction reduction pass)
Any call to @func is replaced with a call to the function with the
new signature and filled with undef. This is not ideal for IPA passes,
but those out-of-scope for now.
Reviewed By: aeubanks
Differential Revision: https://reviews.llvm.org/D111503
97 lines
3.9 KiB
C++
97 lines
3.9 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 "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/ReduceGlobalValues.h"
|
|
#include "deltas/ReduceGlobalVarInitializers.h"
|
|
#include "deltas/ReduceGlobalVars.h"
|
|
#include "deltas/ReduceInstructions.h"
|
|
#include "deltas/ReduceMetadata.h"
|
|
#include "deltas/ReduceModuleData.h"
|
|
#include "deltas/ReduceOperandBundles.h"
|
|
#include "deltas/ReduceOperands.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-initializers", reduceGlobalsInitializersDeltaPass) \
|
|
DELTA_PASS("global-variables", reduceGlobalsDeltaPass) \
|
|
DELTA_PASS("metadata", reduceMetadataDeltaPass) \
|
|
DELTA_PASS("arguments", reduceArgumentsDeltaPass) \
|
|
DELTA_PASS("instructions", reduceInstructionsDeltaPass) \
|
|
DELTA_PASS("operands", reduceOperandsDeltaPass) \
|
|
DELTA_PASS("operands-to-args", reduceOperandsToArgsDeltaPass) \
|
|
DELTA_PASS("operand-bundles", reduceOperandBundesDeltaPass) \
|
|
DELTA_PASS("attributes", reduceAttributesDeltaPass) \
|
|
DELTA_PASS("module-data", reduceModuleDataDeltaPass)
|
|
|
|
static void runAllDeltaPasses(TestRunner &Tester) {
|
|
#define DELTA_PASS(NAME, FUNC) FUNC(Tester);
|
|
DELTA_PASSES
|
|
#undef DELTA_PASS
|
|
}
|
|
|
|
static void runDeltaPassName(TestRunner &Tester, StringRef PassName) {
|
|
#define DELTA_PASS(NAME, FUNC) \
|
|
if (PassName == NAME) { \
|
|
FUNC(Tester); \
|
|
return; \
|
|
}
|
|
DELTA_PASSES
|
|
#undef DELTA_PASS
|
|
errs() << "unknown pass \"" << PassName << "\"";
|
|
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";
|
|
DELTA_PASSES
|
|
#undef DELTA_PASS
|
|
}
|
|
|
|
void llvm::runDeltaPasses(TestRunner &Tester) {
|
|
if (DeltaPasses.empty()) {
|
|
runAllDeltaPasses(Tester);
|
|
} else {
|
|
StringRef Passes = DeltaPasses;
|
|
while (!Passes.empty()) {
|
|
auto Split = Passes.split(",");
|
|
runDeltaPassName(Tester, Split.first);
|
|
Passes = Split.second;
|
|
}
|
|
}
|
|
}
|