Update prebuilt Clang to r416183b from Android.
https://android.googlesource.com/platform/prebuilts/clang/host/
linux-x86/+/06a71ddac05c22edb2d10b590e1769b3f8619bef
clang 12.0.5 (based on r416183b) from build 7284624.
Change-Id: I277a316abcf47307562d8b748b84870f31a72866
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/linux-x64/clang/include/llvm/CodeGen/MachineLoopUtils.h b/linux-x64/clang/include/llvm/CodeGen/MachineLoopUtils.h
new file mode 100644
index 0000000..ec0b352
--- /dev/null
+++ b/linux-x64/clang/include/llvm/CodeGen/MachineLoopUtils.h
@@ -0,0 +1,42 @@
+//=- MachineLoopUtils.h - Helper functions for manipulating loops -*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_CODEGEN_MACHINELOOPUTILS_H
+#define LLVM_LIB_CODEGEN_MACHINELOOPUTILS_H
+
+namespace llvm {
+class MachineLoop;
+class MachineBasicBlock;
+class MachineRegisterInfo;
+class TargetInstrInfo;
+
+enum LoopPeelDirection {
+ LPD_Front, ///< Peel the first iteration of the loop.
+ LPD_Back ///< Peel the last iteration of the loop.
+};
+
+/// Peels a single block loop. Loop must have two successors, one of which
+/// must be itself. Similarly it must have two predecessors, one of which must
+/// be itself.
+///
+/// The loop block is copied and inserted into the CFG such that two copies of
+/// the loop follow on from each other. The copy is inserted either before or
+/// after the loop based on Direction.
+///
+/// Phis are updated and an unconditional branch inserted at the end of the
+/// clone so as to execute a single iteration.
+///
+/// The trip count of Loop is not updated.
+MachineBasicBlock *PeelSingleBlockLoop(LoopPeelDirection Direction,
+ MachineBasicBlock *Loop,
+ MachineRegisterInfo &MRI,
+ const TargetInstrInfo *TII);
+
+} // namespace llvm
+
+#endif // LLVM_LIB_CODEGEN_MACHINELOOPUTILS_H