6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
70 lines
2.8 KiB
C++
70 lines
2.8 KiB
C++
//===-- GuardUtils.h - Utils for work with guards ---------------*- C++ -*-===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
// Utils that are used to perform analyzes related to guards and their
|
|
// conditions.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ANALYSIS_GUARDUTILS_H
|
|
#define LLVM_ANALYSIS_GUARDUTILS_H
|
|
|
|
namespace llvm {
|
|
|
|
class BasicBlock;
|
|
class Use;
|
|
class User;
|
|
class Value;
|
|
template <typename T> class SmallVectorImpl;
|
|
|
|
/// Returns true iff \p U has semantics of a guard expressed in a form of call
|
|
/// of llvm.experimental.guard intrinsic.
|
|
bool isGuard(const User *U);
|
|
|
|
/// Returns true iff \p V has semantics of llvm.experimental.widenable.condition
|
|
/// call
|
|
bool isWidenableCondition(const Value *V);
|
|
|
|
/// Returns true iff \p U is a widenable branch (that is,
|
|
/// extractWidenableCondition returns widenable condition).
|
|
bool isWidenableBranch(const User *U);
|
|
|
|
/// Returns true iff \p U has semantics of a guard expressed in a form of a
|
|
/// widenable conditional branch to deopt block.
|
|
bool isGuardAsWidenableBranch(const User *U);
|
|
|
|
/// If U is widenable branch looking like:
|
|
/// %cond = ...
|
|
/// %wc = call i1 @llvm.experimental.widenable.condition()
|
|
/// %branch_cond = and i1 %cond, %wc
|
|
/// br i1 %branch_cond, label %if_true_bb, label %if_false_bb ; <--- U
|
|
/// The function returns true, and the values %cond and %wc and blocks
|
|
/// %if_true_bb, if_false_bb are returned in
|
|
/// the parameters (Condition, WidenableCondition, IfTrueBB and IfFalseFF)
|
|
/// respectively. If \p U does not match this pattern, return false.
|
|
bool parseWidenableBranch(const User *U, Value *&Condition,
|
|
Value *&WidenableCondition, BasicBlock *&IfTrueBB,
|
|
BasicBlock *&IfFalseBB);
|
|
|
|
/// Analogous to the above, but return the Uses so that they can be
|
|
/// modified. Unlike previous version, Condition is optional and may be null.
|
|
bool parseWidenableBranch(User *U, Use *&Cond, Use *&WC, BasicBlock *&IfTrueBB,
|
|
BasicBlock *&IfFalseBB);
|
|
|
|
// The guard condition is expected to be in form of:
|
|
// cond1 && cond2 && cond3 ...
|
|
// or in case of widenable branch:
|
|
// cond1 && cond2 && cond3 && widenable_contidion ...
|
|
// Method collects the list of checks, but skips widenable_condition.
|
|
void parseWidenableGuard(const User *U, llvm::SmallVectorImpl<Value *> &Checks);
|
|
|
|
// Returns widenable_condition if it exists in the expression tree rooting from
|
|
// \p U and has only one use.
|
|
Value *extractWidenableCondition(const User *U);
|
|
} // llvm
|
|
|
|
#endif // LLVM_ANALYSIS_GUARDUTILS_H
|