github.com/axw/llgo@v0.0.0-20160805011314-95b5fe4dca20/irgen/call.go (about)

     1  //===- call.go - IR generation for calls ----------------------------------===//
     2  //
     3  //                     The LLVM Compiler Infrastructure
     4  //
     5  // This file is distributed under the University of Illinois Open Source
     6  // License. See LICENSE.TXT for details.
     7  //
     8  //===----------------------------------------------------------------------===//
     9  //
    10  // This file implements IR generation for calls.
    11  //
    12  //===----------------------------------------------------------------------===//
    13  
    14  package irgen
    15  
    16  import (
    17  	"llvm.org/llgo/third_party/gotools/go/types"
    18  	"llvm.org/llvm/bindings/go/llvm"
    19  )
    20  
    21  // createCall emits the code for a function call,
    22  // taking into account receivers, and panic/defer.
    23  func (fr *frame) createCall(fn *govalue, chain llvm.Value, argValues []*govalue) []*govalue {
    24  	fntyp := fn.Type().Underlying().(*types.Signature)
    25  	typinfo := fr.types.getSignatureInfo(fntyp)
    26  
    27  	args := make([]llvm.Value, len(argValues))
    28  	for i, arg := range argValues {
    29  		args[i] = arg.value
    30  	}
    31  	var results []llvm.Value
    32  	if fr.unwindBlock.IsNil() {
    33  		results = typinfo.call(fr.types.ctx, fr.allocaBuilder, fr.builder, fn.value, chain, args)
    34  	} else {
    35  		contbb := llvm.AddBasicBlock(fr.function, "")
    36  		results = typinfo.invoke(fr.types.ctx, fr.allocaBuilder, fr.builder, fn.value, chain, args, contbb, fr.unwindBlock)
    37  	}
    38  
    39  	resultValues := make([]*govalue, len(results))
    40  	for i, res := range results {
    41  		resultValues[i] = newValue(res, fntyp.Results().At(i).Type())
    42  	}
    43  	return resultValues
    44  }