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author | rtk0c <[email protected]> | 2022-06-03 23:26:44 -0700 |
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committer | rtk0c <[email protected]> | 2022-06-03 23:26:44 -0700 |
commit | 60ccc62f4934e44ad5b905fdbcf458302b8d8a09 (patch) | |
tree | 02ec83cc8387abfd08bd5ee7ea4e8115f1bfb8d0 /source/10-common/SmallVector.cpp | |
parent | c2ef7737536bf1f8c81fcfae95c0183b21c9753f (diff) |
Changeset: 63 [WIP] Rename directories
Diffstat (limited to 'source/10-common/SmallVector.cpp')
-rw-r--r-- | source/10-common/SmallVector.cpp | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/source/10-common/SmallVector.cpp b/source/10-common/SmallVector.cpp deleted file mode 100644 index c38e8a7..0000000 --- a/source/10-common/SmallVector.cpp +++ /dev/null @@ -1,145 +0,0 @@ -// Obtained from https://github.com/llvm/llvm-project/blob/main/llvm/lib/Support/SmallVector.cpp -// commit 4b82bb6d82f65f98f23d0e4c2cd5297dc162864c -// adapted in code style and utilities to fix this project - -//===- 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 "SmallVector.hpp" - -#include <cstdlib> -#include <stdexcept> -#include <string> - -// 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 -} // namespace -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) + ")"; - throw std::length_error(Reason); -} - -/// 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); - throw std::length_error(Reason); -} - -// 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::min(std::max(NewCapacity, MinSize), MaxSize); -} - -// Note: Moving this function into the header may cause performance regression. -template <class Size_T> -void* SmallVectorBase<Size_T>::mallocForGrow(size_t MinSize, size_t TSize, size_t& NewCapacity) { - NewCapacity = getNewCapacity<Size_T>(MinSize, TSize, this->capacity()); - return malloc(NewCapacity * TSize); -} - -// 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 = malloc(NewCapacity * TSize); - - // 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 = realloc(this->BeginX, NewCapacity * TSize); - } - - this->BeginX = NewElts; - this->Capacity = NewCapacity; -} - -template class 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 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 |