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llvm-mirror/include/llvm/IR/PrintPasses.h
Arthur Eubanks 5bc5d5ec44 [NewPM] Support --print-before/after in NPM
This changes --print-before/after to be a list of strings rather than
legacy passes. (this also has the effect of not showing the entire list
of passes in --help-hidden after --print-before/after, which IMO is
great for making it less verbose).

Currently PrintIRInstrumentation passes the class name rather than pass
name to llvm::shouldPrintBeforePass(), meaning
llvm::shouldPrintBeforePass() never functions as intended in the NPM.
There is no easy way of converting class names to pass names outside of
within an instance of PassBuilder.

This adds a map of pass class names to their short names in
PassRegistry.def within PassInstrumentationCallbacks. It is populated
inside the constructor of PassBuilder, which takes a
PassInstrumentationCallbacks.

Add a pointer to PassInstrumentationCallbacks inside
PrintIRInstrumentation and use the newly created map.

This is a bit hacky, but I can't think of a better way since the short
id to class name only exists within PassRegistry.def. This also doesn't
handle passes not in PassRegistry.def but rather added via
PassBuilder::registerPipelineParsingCallback().

llvm/test/CodeGen/Generic/print-after.ll doesn't seem very useful now
with this change.

Reviewed By: ychen, jamieschmeiser

Differential Revision: https://reviews.llvm.org/D87216
2020-12-03 16:52:14 -08:00

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//===- PrintPasses.h - Determining whether/when to print IR ---------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_IR_PRINTPASSES_H
#define LLVM_IR_PRINTPASSES_H
#include "llvm/ADT/StringRef.h"
#include <vector>
namespace llvm {
// Returns true if printing before/after some pass is enabled, whether all
// passes or a specific pass.
bool shouldPrintBeforeSomePass();
bool shouldPrintAfterSomePass();
// Returns true if we should print before/after a specific pass. The argument
// should be the pass ID, e.g. "instcombine".
bool shouldPrintBeforePass(StringRef PassID);
bool shouldPrintAfterPass(StringRef PassID);
// Returns true if we should print before/after all passes.
bool shouldPrintBeforeAll();
bool shouldPrintAfterAll();
// The list of passes to print before/after, if we only want to print
// before/after specific passes.
std::vector<std::string> printBeforePasses();
std::vector<std::string> printAfterPasses();
// Returns true if we should always print the entire module.
bool forcePrintModuleIR();
// Returns true if we should print the function.
bool isFunctionInPrintList(StringRef FunctionName);
} // namespace llvm
#endif // LLVM_IR_PRINTPASSES_H