mirror of
https://github.com/carbon-language/carbon-lang.git
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Dana Jansens
64139e5d65
This takes the debug runtime of `toolchain/check/testdata/interop/cpp/function/arithmetic_types_bridged.carbon` from 4.7s down to about 4s (so 15% faster overall). There's still lots of room to improve this test which seems to be hitting lots of pathological behaviour, but InstNamer is 30% of the runtime, with fingerprinting's `InstFingerprinter::GetOrCompute` consuming 10% of cycles. We reduce its impact by using a vector of vectors instead of a Map for the cache of fingerprints. After this change InstNamer drops below 24% of the runtime. Also move the instruction name when giving it to `AllocateName` since it receives std::string by value, though this doesn't show up in the profile for the test.
45 lines
1.4 KiB
C++
45 lines
1.4 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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#ifndef CARBON_TOOLCHAIN_LOWER_LOWER_H_
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#define CARBON_TOOLCHAIN_LOWER_LOWER_H_
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "toolchain/parse/tree_and_subtrees.h"
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#include "toolchain/sem_ir/file.h"
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#include "toolchain/sem_ir/inst_namer.h"
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namespace Carbon::Lower {
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struct LowerToLLVMOptions {
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// Options must be set individually, not through initialization.
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explicit LowerToLLVMOptions() = default;
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// If set, enables LLVM IR verification.
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llvm::raw_ostream* llvm_verifier_stream = nullptr;
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// Whether to include debug info in lowered output.
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bool want_debug_info = false;
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// If set, enables verbose output.
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llvm::raw_ostream* vlog_stream = nullptr;
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// If set, LLVM IR will be dumped to this in textual form.
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llvm::raw_ostream* dump_stream = nullptr;
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};
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// Lowers SemIR to LLVM IR.
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auto LowerToLLVM(
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llvm::LLVMContext& llvm_context,
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llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> fs,
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const Parse::GetTreeAndSubtreesStore& tree_and_subtrees_getters,
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const SemIR::File& sem_ir, int total_ir_count,
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const LowerToLLVMOptions& options) -> std::unique_ptr<llvm::Module>;
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} // namespace Carbon::Lower
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#endif // CARBON_TOOLCHAIN_LOWER_LOWER_H_
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