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record_lookup.go
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record_lookup.go
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/*---------------------------------------------------------------------------------------------
* Copyright (c) Peter Bjorklund. All rights reserved.
* Licensed under the MIT License. See LICENSE in the project root for license information.
*--------------------------------------------------------------------------------------------*/
package generate_ir
import (
"fmt"
"github.com/llir/llvm/ir"
"github.com/llir/llvm/ir/constant"
"github.com/llir/llvm/ir/types"
"github.com/llir/llvm/ir/value"
decorated "github.com/swamp/compiler/src/decorated/expression"
"log"
)
func handleRecordLookup(lookups *decorated.RecordLookups,
genContext *generateContext) (value.Value, error) {
structPtr, err := generateExpression(lookups.Expression(), false, genContext)
if err != nil {
return nil, err
}
if !types.IsPointer(structPtr.Type()) {
panic(fmt.Errorf("something went wrong %v", structPtr))
}
log.Printf("structPtr: %v", structPtr)
for lookupIndex, field := range lookups.LookupFields() {
var indices []value.Value
if lookupIndex == 0 {
//indices = append(indices, constant.NewInt(types.I32, int64(0)))
}
indices = append(indices, constant.NewInt(types.I32, int64(field.Index())))
irFieldType, err := genContext.irTypeRepo.GetTypeRef(field.RecordTypeFieldReference().Type())
if err != nil {
return nil, err
}
//irFieldTypePtr := types.NewPointer(irFieldType)
log.Printf("expected type %v", irFieldType)
log.Printf("#%d lookup %v source:%v indices:%v raw:%v", lookupIndex, irFieldType, structPtr, indices, lookups.LookupFields())
structPtr = ir.NewGetElementPtr(irFieldType, structPtr, indices...)
}
lastField := lookups.LookupFields()[len(lookups.LookupFields())-1]
lastIrFieldType, lastErr := genContext.irTypeRepo.GetTypeRef(lastField.RecordTypeFieldReference().Type())
if lastErr != nil {
return nil, lastErr
}
loadInstruction := ir.NewLoad(lastIrFieldType, structPtr)
return loadInstruction, nil
}
func generateLookups(lookups *decorated.RecordLookups,
genContext *generateContext) (value.Value, error) {
sourcePosRange, err := handleRecordLookup(lookups, genContext)
if err != nil {
return nil, err
}
return sourcePosRange, nil
}