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https://github.com/carbon-language/carbon-lang.git
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Chandler Carruth
f17939e252
This switches from `int_store*` to `int*` as this file contains both the ID and the store for integers. This was supposed to be added to #4487 before merging, apologies for missing that.
67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "toolchain/base/int.h"
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namespace Carbon {
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auto IntStore::CanonicalBitWidth(int significant_bits) -> int {
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// For larger integers, we store them in as a signed APInt with a canonical
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// width that is the smallest multiple of the word type's bits, but no
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// smaller than a minimum of 64 bits to avoid spurious resizing of the most
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// common cases (<= 64 bits).
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static constexpr int WordWidth = llvm::APInt::APINT_BITS_PER_WORD;
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return std::max<int>(
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MinAPWidth, ((significant_bits + WordWidth - 1) / WordWidth) * WordWidth);
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}
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auto IntStore::CanonicalizeSigned(llvm::APInt value) -> llvm::APInt {
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return value.sextOrTrunc(CanonicalBitWidth(value.getSignificantBits()));
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}
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auto IntStore::CanonicalizeUnsigned(llvm::APInt value) -> llvm::APInt {
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// We need the width to include a zero sign bit as we canonicalize to a
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// signed representation.
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return value.zextOrTrunc(CanonicalBitWidth(value.getActiveBits() + 1));
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}
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auto IntStore::AddLarge(int64_t value) -> IntId {
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auto ap_id =
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values_.Add(llvm::APInt(CanonicalBitWidth(64), value, /*isSigned=*/true));
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return MakeIndexOrInvalid(ap_id.index);
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}
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auto IntStore::AddSignedLarge(llvm::APInt value) -> IntId {
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auto ap_id = values_.Add(CanonicalizeSigned(value));
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return MakeIndexOrInvalid(ap_id.index);
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}
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auto IntStore::AddUnsignedLarge(llvm::APInt value) -> IntId {
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auto ap_id = values_.Add(CanonicalizeUnsigned(value));
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return MakeIndexOrInvalid(ap_id.index);
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}
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auto IntStore::LookupLarge(int64_t value) const -> IntId {
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auto ap_id = values_.Lookup(
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llvm::APInt(CanonicalBitWidth(64), value, /*isSigned=*/true));
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return MakeIndexOrInvalid(ap_id.index);
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}
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auto IntStore::LookupSignedLarge(llvm::APInt value) const -> IntId {
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auto ap_id = values_.Lookup(CanonicalizeSigned(value));
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return MakeIndexOrInvalid(ap_id.index);
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}
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auto IntStore::OutputYaml() const -> Yaml::OutputMapping {
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return values_.OutputYaml();
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}
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auto IntStore::CollectMemUsage(MemUsage& mem_usage, llvm::StringRef label) const
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-> void {
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mem_usage.Collect(std::string(label), values_);
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}
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} // namespace Carbon
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