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reflect: implement New function

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This is very important for some use cases, for example for Vecty.
This commit is contained in:
Ayke van Laethem
2021-04-11 13:50:44 +02:00
committed by Ron Evans
parent 57271d7eaa
commit e587b1d1b4
8 changed files with 87 additions and 25 deletions
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compiler/compiler.go
+1 -1
View File
@@ -23,7 +23,7 @@ import (
// Version of the compiler pacakge. Must be incremented each time the compiler
// package changes in a way that affects the generated LLVM module.
// This version is independent of the TinyGo version number.
const Version = 8 // last change: don't use runtime.typecodeID in func lowering
const Version = 9 // last change: implement reflect.New()
func init() {
llvm.InitializeAllTargets()
compiler/interface.go
+19 -15
View File
@@ -46,6 +46,7 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
var references llvm.Value
var length int64
var methodSet llvm.Value
var ptrTo llvm.Value
switch typ := typ.(type) {
case *types.Named:
references = c.getTypeCode(typ.Underlying())
@@ -69,22 +70,25 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
if _, ok := typ.Underlying().(*types.Interface); !ok {
methodSet = c.getTypeMethodSet(typ)
}
if !references.IsNil() || length != 0 || !methodSet.IsNil() {
// Set the 'references' field of the runtime.typecodeID struct.
globalValue := llvm.ConstNull(global.Type().ElementType())
if !references.IsNil() {
globalValue = llvm.ConstInsertValue(globalValue, references, []uint32{0})
}
if length != 0 {
lengthValue := llvm.ConstInt(c.uintptrType, uint64(length), false)
globalValue = llvm.ConstInsertValue(globalValue, lengthValue, []uint32{1})
}
if !methodSet.IsNil() {
globalValue = llvm.ConstInsertValue(globalValue, methodSet, []uint32{2})
}
global.SetInitializer(globalValue)
global.SetLinkage(llvm.LinkOnceODRLinkage)
if _, ok := typ.Underlying().(*types.Pointer); !ok {
ptrTo = c.getTypeCode(types.NewPointer(typ))
}
globalValue := llvm.ConstNull(global.Type().ElementType())
if !references.IsNil() {
globalValue = llvm.ConstInsertValue(globalValue, references, []uint32{0})
}
if length != 0 {
lengthValue := llvm.ConstInt(c.uintptrType, uint64(length), false)
globalValue = llvm.ConstInsertValue(globalValue, lengthValue, []uint32{1})
}
if !methodSet.IsNil() {
globalValue = llvm.ConstInsertValue(globalValue, methodSet, []uint32{2})
}
if !ptrTo.IsNil() {
globalValue = llvm.ConstInsertValue(globalValue, ptrTo, []uint32{3})
}
global.SetInitializer(globalValue)
global.SetLinkage(llvm.LinkOnceODRLinkage)
global.SetGlobalConstant(true)
}
return global
compiler/testdata/interface.ll
Vendored
+9 -8
View File
@@ -3,20 +3,21 @@ source_filename = "interface.go"
target datalayout = "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-f64:32:64-f80:32-n8:16:32-S128"
target triple = "i686--linux"
%runtime.typecodeID = type { %runtime.typecodeID*, i32, %runtime.interfaceMethodInfo* }
%runtime.typecodeID = type { %runtime.typecodeID*, i32, %runtime.interfaceMethodInfo*, %runtime.typecodeID* }
%runtime.interfaceMethodInfo = type { i8*, i32 }
%runtime._interface = type { i32, i8* }
%runtime._string = type { i8*, i32 }
@"reflect/types.type:basic:int" = linkonce_odr constant %runtime.typecodeID zeroinitializer
@"reflect/types.type:pointer:basic:int" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:basic:int", i32 0, %runtime.interfaceMethodInfo* null }
@"reflect/types.type:pointer:named:error" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:named:error", i32 0, %runtime.interfaceMethodInfo* null }
@"reflect/types.type:named:error" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:interface:{Error:func:{}{basic:string}}", i32 0, %runtime.interfaceMethodInfo* null }
@"reflect/types.type:interface:{Error:func:{}{basic:string}}" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* bitcast ([1 x i8*]* @"reflect/types.interface:interface{Error() string}$interface" to %runtime.typecodeID*), i32 0, %runtime.interfaceMethodInfo* null }
@"reflect/types.type:basic:int" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* null, i32 0, %runtime.interfaceMethodInfo* null, %runtime.typecodeID* @"reflect/types.type:pointer:basic:int" }
@"reflect/types.type:pointer:basic:int" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:basic:int", i32 0, %runtime.interfaceMethodInfo* null, %runtime.typecodeID* null }
@"reflect/types.type:pointer:named:error" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:named:error", i32 0, %runtime.interfaceMethodInfo* null, %runtime.typecodeID* null }
@"reflect/types.type:named:error" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:interface:{Error:func:{}{basic:string}}", i32 0, %runtime.interfaceMethodInfo* null, %runtime.typecodeID* @"reflect/types.type:pointer:named:error" }
@"reflect/types.type:interface:{Error:func:{}{basic:string}}" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* bitcast ([1 x i8*]* @"reflect/types.interface:interface{Error() string}$interface" to %runtime.typecodeID*), i32 0, %runtime.interfaceMethodInfo* null, %runtime.typecodeID* @"reflect/types.type:pointer:interface:{Error:func:{}{basic:string}}" }
@"func Error() string" = external constant i8
@"reflect/types.interface:interface{Error() string}$interface" = linkonce_odr constant [1 x i8*] [i8* @"func Error() string"]
@"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:interface:{String:func:{}{basic:string}}", i32 0, %runtime.interfaceMethodInfo* null }
@"reflect/types.type:interface:{String:func:{}{basic:string}}" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* bitcast ([1 x i8*]* @"reflect/types.interface:interface{String() string}$interface" to %runtime.typecodeID*), i32 0, %runtime.interfaceMethodInfo* null }
@"reflect/types.type:pointer:interface:{Error:func:{}{basic:string}}" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:interface:{Error:func:{}{basic:string}}", i32 0, %runtime.interfaceMethodInfo* null, %runtime.typecodeID* null }
@"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:interface:{String:func:{}{basic:string}}", i32 0, %runtime.interfaceMethodInfo* null, %runtime.typecodeID* null }
@"reflect/types.type:interface:{String:func:{}{basic:string}}" = linkonce_odr constant %runtime.typecodeID { %runtime.typecodeID* bitcast ([1 x i8*]* @"reflect/types.interface:interface{String() string}$interface" to %runtime.typecodeID*), i32 0, %runtime.interfaceMethodInfo* null, %runtime.typecodeID* @"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}" }
@"func String() string" = external constant i8
@"reflect/types.interface:interface{String() string}$interface" = linkonce_odr constant [1 x i8*] [i8* @"func String() string"]
@"reflect/types.typeid:basic:int" = external constant i8