llvm-project/llvm/lib/Support/ARMWinEH.cpp
serge-sans-paille 75e164f61d [llvm] Cleanup header dependencies in ADT and Support
The cleanup was manual, but assisted by "include-what-you-use". It consists in

1. Removing unused forward declaration. No impact expected.
2. Removing unused headers in .cpp files. No impact expected.
3. Removing unused headers in .h files. This removes implicit dependencies and
   is generally considered a good thing, but this may break downstream builds.
   I've updated llvm, clang, lld, lldb and mlir deps, and included a list of the
   modification in the second part of the commit.
4. Replacing header inclusion by forward declaration. This has the same impact
   as 3.

Notable changes:

- llvm/Support/TargetParser.h no longer includes llvm/Support/AArch64TargetParser.h nor llvm/Support/ARMTargetParser.h
- llvm/Support/TypeSize.h no longer includes llvm/Support/WithColor.h
- llvm/Support/YAMLTraits.h no longer includes llvm/Support/Regex.h
- llvm/ADT/SmallVector.h no longer includes llvm/Support/MemAlloc.h nor llvm/Support/ErrorHandling.h

You may need to add some of these headers in your compilation units, if needs be.

As an hint to the impact of the cleanup, running

clang++ -E  -Iinclude -I../llvm/include ../llvm/lib/Support/*.cpp -std=c++14 -fno-rtti -fno-exceptions | wc -l

before: 8000919 lines
after:  7917500 lines

Reduced dependencies also helps incremental rebuilds and is more ccache
friendly, something not shown by the above metric :-)

Discourse thread on the topic: https://llvm.discourse.group/t/include-what-you-use-include-cleanup/5831
2022-01-21 13:54:49 +01:00

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//===-- ARMWinEH.cpp - Windows on ARM EH Support Functions ------*- 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
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/ARMWinEH.h"
namespace llvm {
namespace ARM {
namespace WinEH {
std::pair<uint16_t, uint32_t> SavedRegisterMask(const RuntimeFunction &RF) {
uint8_t NumRegisters = RF.Reg();
uint8_t RegistersVFP = RF.R();
uint8_t LinkRegister = RF.L();
uint8_t ChainedFrame = RF.C();
uint16_t GPRMask = (ChainedFrame << 11) | (LinkRegister << 14);
uint32_t VFPMask = 0;
if (RegistersVFP)
VFPMask |= (((1 << ((NumRegisters + 1) % 8)) - 1) << 8);
else
GPRMask |= (((1 << (NumRegisters + 1)) - 1) << 4);
if (PrologueFolding(RF))
GPRMask |= (((1 << (NumRegisters + 1)) - 1) << (~RF.StackAdjust() & 0x3));
return std::make_pair(GPRMask, VFPMask);
}
} // namespace WinEH
} // namespace ARM
} // namespace llvm