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Common: Add LLVM SmallVector

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@ -358,6 +358,228 @@ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
</pre>
<h3>LLVM - <a href="https://github.com/llvm/llvm-project">https://github.com/llvm/llvm-project</a></h3>
<pre>
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<h3>LZMA SDK - <a href="https://7-zip.org/sdk.html">https://7-zip.org/sdk.html</a></h3>
<pre>
LZMA SDK is placed in the public domain.

2
src/common/CMakeLists.txt
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@ -49,6 +49,8 @@ add_library(common
small_string.h
string_util.cpp
string_util.h
thirdparty/SmallVector.cpp
thirdparty/SmallVector.h
threading.cpp
threading.h
timer.cpp

3
src/common/common.vcxproj
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@ -35,6 +35,7 @@
<ClInclude Include="small_string.h" />
<ClInclude Include="heterogeneous_containers.h" />
<ClInclude Include="string_util.h" />
<ClInclude Include="thirdparty\SmallVector.h" />
<ClInclude Include="thirdparty\StackWalker.h" />
<ClInclude Include="threading.h" />
<ClInclude Include="timer.h" />
@ -61,12 +62,14 @@
<ClCompile Include="sha1_digest.cpp" />
<ClCompile Include="small_string.cpp" />
<ClCompile Include="string_util.cpp" />
<ClCompile Include="thirdparty\SmallVector.cpp" />
<ClCompile Include="thirdparty\StackWalker.cpp" />
<ClCompile Include="threading.cpp" />
<ClCompile Include="timer.cpp" />
</ItemGroup>
<ItemGroup>
<Natvis Include="bitfield.natvis" />
<Natvis Include="thirdparty\llvm.natvis" />
</ItemGroup>
<ItemGroup>
<MARMASM Include="fastjmp_arm.asm">

9
src/common/common.vcxproj.filters
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@ -42,6 +42,9 @@
<ClInclude Include="memmap.h" />
<ClInclude Include="intrin.h" />
<ClInclude Include="perf_scope.h" />
<ClInclude Include="thirdparty\SmallVector.h">
<Filter>thirdparty</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<ClCompile Include="small_string.cpp" />
@ -67,9 +70,15 @@
<ClCompile Include="fastjmp.cpp" />
<ClCompile Include="memmap.cpp" />
<ClCompile Include="perf_scope.cpp" />
<ClCompile Include="thirdparty\SmallVector.cpp">
<Filter>thirdparty</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<Natvis Include="bitfield.natvis" />
<Natvis Include="thirdparty\llvm.natvis">
<Filter>thirdparty</Filter>
</Natvis>
</ItemGroup>
<ItemGroup>
<Filter Include="thirdparty">

214
src/common/thirdparty/SmallVector.cpp vendored Normal file
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@ -0,0 +1,214 @@
//===- llvm/ADT/SmallVector.cpp - 'Normally small' vectors ----------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements the SmallVector class.
//
//===----------------------------------------------------------------------===//
#include "common/thirdparty/SmallVector.h"
//#include "llvm/ADT/Twine.h"
//#include "llvm/Support/MemAlloc.h"
#include <cstdint>
#include <string>
#ifdef LLVM_ENABLE_EXCEPTIONS
#include <stdexcept>
#endif
using namespace llvm;
namespace llvm
{
/*LLVM_ATTRIBUTE_RETURNS_NONNULL*/ inline void *safe_malloc(size_t Sz) {
void *Result = std::malloc(Sz);
if (Result == nullptr) {
// It is implementation-defined whether allocation occurs if the space
// requested is zero (ISO/IEC 9899:2018 7.22.3). Retry, requesting
// non-zero, if the space requested was zero.
if (Sz == 0)
return safe_malloc(1);
//report_bad_alloc_error("Allocation failed");
fputs("Allocation failed\n", stderr);
abort();
}
return Result;
}
/*LLVM_ATTRIBUTE_RETURNS_NONNULL*/ inline void *safe_realloc(void *Ptr, size_t Sz) {
void *Result = std::realloc(Ptr, Sz);
if (Result == nullptr) {
// It is implementation-defined whether allocation occurs if the space
// requested is zero (ISO/IEC 9899:2018 7.22.3). Retry, requesting
// non-zero, if the space requested was zero.
if (Sz == 0)
return safe_malloc(1);
//report_bad_alloc_error("Allocation failed");
fputs("Allocation failed\n", stderr);
abort();
}
return Result;
}
}
// Check that no bytes are wasted and everything is well-aligned.
namespace {
// These structures may cause binary compat warnings on AIX. Suppress the
// warning since we are only using these types for the static assertions below.
#if defined(_AIX)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Waix-compat"
#endif
struct Struct16B {
alignas(16) void *X;
};
struct Struct32B {
alignas(32) void *X;
};
#if defined(_AIX)
#pragma GCC diagnostic pop
#endif
}
static_assert(sizeof(SmallVector<void *, 0>) ==
sizeof(unsigned) * 2 + sizeof(void *),
"wasted space in SmallVector size 0");
static_assert(alignof(SmallVector<Struct16B, 0>) >= alignof(Struct16B),
"wrong alignment for 16-byte aligned T");
static_assert(alignof(SmallVector<Struct32B, 0>) >= alignof(Struct32B),
"wrong alignment for 32-byte aligned T");
static_assert(sizeof(SmallVector<Struct16B, 0>) >= alignof(Struct16B),
"missing padding for 16-byte aligned T");
static_assert(sizeof(SmallVector<Struct32B, 0>) >= alignof(Struct32B),
"missing padding for 32-byte aligned T");
static_assert(sizeof(SmallVector<void *, 1>) ==
sizeof(unsigned) * 2 + sizeof(void *) * 2,
"wasted space in SmallVector size 1");
static_assert(sizeof(SmallVector<char, 0>) ==
sizeof(void *) * 2 + sizeof(void *),
"1 byte elements have word-sized type for size and capacity");
/// Report that MinSize doesn't fit into this vector's size type. Throws
/// std::length_error or calls report_fatal_error.
[[noreturn]] static void report_size_overflow(size_t MinSize, size_t MaxSize);
static void report_size_overflow(size_t MinSize, size_t MaxSize) {
std::string Reason = "SmallVector unable to grow. Requested capacity (" +
std::to_string(MinSize) +
") is larger than maximum value for size type (" +
std::to_string(MaxSize) + ")\n";
#ifdef LLVM_ENABLE_EXCEPTIONS
throw std::length_error(Reason);
#else
//report_fatal_error(Twine(Reason));
fputs(Reason.c_str(), stderr);
abort();
#endif
}
/// Report that this vector is already at maximum capacity. Throws
/// std::length_error or calls report_fatal_error.
[[noreturn]] static void report_at_maximum_capacity(size_t MaxSize);
static void report_at_maximum_capacity(size_t MaxSize) {
std::string Reason =
"SmallVector capacity unable to grow. Already at maximum size " +
std::to_string(MaxSize);
#ifdef LLVM_ENABLE_EXCEPTIONS
throw std::length_error(Reason);
#else
//report_fatal_error(Twine(Reason));
fputs(Reason.c_str(), stderr);
abort();
#endif
}
// Note: Moving this function into the header may cause performance regression.
template <class Size_T>
static size_t getNewCapacity(size_t MinSize, size_t TSize, size_t OldCapacity) {
constexpr size_t MaxSize = std::numeric_limits<Size_T>::max();
// Ensure we can fit the new capacity.
// This is only going to be applicable when the capacity is 32 bit.
if (MinSize > MaxSize)
report_size_overflow(MinSize, MaxSize);
// Ensure we can meet the guarantee of space for at least one more element.
// The above check alone will not catch the case where grow is called with a
// default MinSize of 0, but the current capacity cannot be increased.
// This is only going to be applicable when the capacity is 32 bit.
if (OldCapacity == MaxSize)
report_at_maximum_capacity(MaxSize);
// In theory 2*capacity can overflow if the capacity is 64 bit, but the
// original capacity would never be large enough for this to be a problem.
size_t NewCapacity = 2 * OldCapacity + 1; // Always grow.
return std::clamp(NewCapacity, MinSize, MaxSize);
}
template <class Size_T>
void *SmallVectorBase<Size_T>::replaceAllocation(void *NewElts, size_t TSize,
size_t NewCapacity,
size_t VSize) {
void *NewEltsReplace = llvm::safe_malloc(NewCapacity * TSize);
if (VSize)
memcpy(NewEltsReplace, NewElts, VSize * TSize);
free(NewElts);
return NewEltsReplace;
}
// Note: Moving this function into the header may cause performance regression.
template <class Size_T>
void *SmallVectorBase<Size_T>::mallocForGrow(void *FirstEl, size_t MinSize,
size_t TSize,
size_t &NewCapacity) {
NewCapacity = getNewCapacity<Size_T>(MinSize, TSize, this->capacity());
// Even if capacity is not 0 now, if the vector was originally created with
// capacity 0, it's possible for the malloc to return FirstEl.
//void *NewElts = llvm::safe_malloc(NewCapacity * TSize);
void* NewElts = llvm::safe_malloc(NewCapacity * TSize);
if (NewElts == FirstEl)
NewElts = replaceAllocation(NewElts, TSize, NewCapacity);
return NewElts;
}
// Note: Moving this function into the header may cause performance regression.
template <class Size_T>
void SmallVectorBase<Size_T>::grow_pod(void *FirstEl, size_t MinSize,
size_t TSize) {
size_t NewCapacity = getNewCapacity<Size_T>(MinSize, TSize, this->capacity());
void *NewElts;
if (BeginX == FirstEl) {
NewElts = llvm::safe_malloc(NewCapacity * TSize);
if (NewElts == FirstEl)
NewElts = replaceAllocation(NewElts, TSize, NewCapacity);
// Copy the elements over. No need to run dtors on PODs.
memcpy(NewElts, this->BeginX, size() * TSize);
} else {
// If this wasn't grown from the inline copy, grow the allocated space.
NewElts = llvm::safe_realloc(this->BeginX, NewCapacity * TSize);
if (NewElts == FirstEl)
NewElts = replaceAllocation(NewElts, TSize, NewCapacity, size());
}
this->BeginX = NewElts;
this->Capacity = NewCapacity;
}
template class llvm::SmallVectorBase<uint32_t>;
// Disable the uint64_t instantiation for 32-bit builds.
// Both uint32_t and uint64_t instantiations are needed for 64-bit builds.
// This instantiation will never be used in 32-bit builds, and will cause
// warnings when sizeof(Size_T) > sizeof(size_t).
#if SIZE_MAX > UINT32_MAX
template class llvm::SmallVectorBase<uint64_t>;
// Assertions to ensure this #if stays in sync with SmallVectorSizeType.
static_assert(sizeof(SmallVectorSizeType<char>) == sizeof(uint64_t),
"Expected SmallVectorBase<uint64_t> variant to be in use.");
#else
static_assert(sizeof(SmallVectorSizeType<char>) == sizeof(uint32_t),
"Expected SmallVectorBase<uint32_t> variant to be in use.");
#endif

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25
src/common/thirdparty/llvm.natvis vendored Normal file
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@ -0,0 +1,25 @@
<?xml version="1.0" encoding="utf-8"?>
<!--
Visual Studio Native Debugging Visualizers for LLVM
For Visual Studio 2013 only, put this file into
"%USERPROFILE%\Documents\Visual Studio 2013\Visualizers" or create a symbolic link so it updates automatically.
For later versions of Visual Studio, no setup is required.
-->
<AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">
<Type Name="llvm::SmallVectorImpl&lt;*&gt;">
<DisplayString Condition="Size == 0">empty</DisplayString>
<DisplayString Condition="Size &amp;&amp; Size &lt; 4">{(value_type*)BeginX,[Size]}</DisplayString>
<DisplayString Condition="Size &gt; 3">{Size} elements</DisplayString>
<DisplayString>Uninitialized</DisplayString>
<Expand>
<Item Name="[size]">Size</Item>
<Item Name="[capacity]">Capacity</Item>
<ArrayItems>
<Size>Size</Size>
<ValuePointer>(value_type*)BeginX</ValuePointer>
</ArrayItems>
</Expand>
</Type>
</AutoVisualizer>