intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 65 insertions, 0 deletions

diff --git a/contrib/libs/llvm12/include/llvm/Analysis/GuardUtils.h b/contrib/libs/llvm12/include/llvm/Analysis/GuardUtils.h
new file mode 100644
index 0000000000..ccf247689e
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/Analysis/GuardUtils.h
@@ -0,0 +1,65 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===-- 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;
+
+/// 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 U is a widenable branch (that is, parseWidenableBranch
+/// returns true).
+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);
+
+/// Analgous to the above, but return the Uses so that 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);
+  
+} // llvm
+
+#endif // LLVM_ANALYSIS_GUARDUTILS_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif