3b1913ac57
The old LLVM pass manager is deprecated and should not be used anymore. Moreover, the pass manager builder (which we used to set up a pass pipeline) is actually removed from LLVM entirely in LLVM 17: https://reviews.llvm.org/D145387 https://reviews.llvm.org/D145835 The new pass manager does change the binary size in many cases: both growing and shrinking it. However, on average the binary size remains more or less the same. This is needed as a preparation for LLVM 17.
38 строки
1,5 КиБ
Go
38 строки
1,5 КиБ
Go
// Package transform contains transformation passes for the TinyGo compiler.
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// These transformation passes may be optimization passes or lowering passes.
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//
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// Optimization passes transform the IR in such a way that they increase the
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// performance of the generated code and/or help the LLVM optimizer better do
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// its job by simplifying the IR. This usually means that certain
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// TinyGo-specific runtime calls are removed or replaced with something simpler
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// if that is a valid operation.
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//
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// Lowering passes are usually required to run. One example is the interface
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// lowering pass, which replaces stub runtime calls to get an interface method
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// with the method implementation (either a direct call or a thunk).
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package transform
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import (
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"github.com/tinygo-org/tinygo/compileopts"
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"tinygo.org/x/go-llvm"
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)
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// AddStandardAttributes is a helper function to add standard function
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// attributes to a function. For example, it adds optsize when requested from
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// the -opt= compiler flag.
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func AddStandardAttributes(fn llvm.Value, config *compileopts.Config) {
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ctx := fn.Type().Context()
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_, _, sizeLevel := config.OptLevel()
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if sizeLevel >= 1 {
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fn.AddFunctionAttr(ctx.CreateEnumAttribute(llvm.AttributeKindID("optsize"), 0))
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}
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if sizeLevel >= 2 {
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fn.AddFunctionAttr(ctx.CreateEnumAttribute(llvm.AttributeKindID("minsize"), 0))
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}
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if config.CPU() != "" {
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fn.AddFunctionAttr(ctx.CreateStringAttribute("target-cpu", config.CPU()))
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}
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if config.Features() != "" {
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fn.AddFunctionAttr(ctx.CreateStringAttribute("target-features", config.Features()))
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}
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}
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