forked from OSchip/llvm-project
38 lines
1.2 KiB
Go
38 lines
1.2 KiB
Go
//===- closures.go - IR generation for closures ---------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements IR generation for closures.
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//
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//===----------------------------------------------------------------------===//
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package irgen
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import (
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"llvm.org/llgo/third_party/gotools/go/types"
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)
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// makeClosure creates a closure from a function pointer and
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// a set of bindings. The bindings are addresses of captured
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// variables.
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func (fr *frame) makeClosure(fn *govalue, bindings []*govalue) *govalue {
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govalues := append([]*govalue{fn}, bindings...)
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fields := make([]*types.Var, len(govalues))
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for i, v := range govalues {
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field := types.NewField(0, nil, "_", v.Type(), false)
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fields[i] = field
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}
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block := fr.createTypeMalloc(types.NewStruct(fields, nil))
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for i, v := range govalues {
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addressPtr := fr.builder.CreateStructGEP(block, i, "")
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fr.builder.CreateStore(v.value, addressPtr)
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}
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closure := fr.builder.CreateBitCast(block, fn.value.Type(), "")
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return newValue(closure, fn.Type())
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}
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