bbb2909283
This distinction was useful before when reflect wasn't properly supported. Back then it made sense to only include method sets that were actually used in an interface. But now that it is possible to get to other values (for example, by extracting fields from structs) and it is possible to turn them back into interfaces, it is necessary to preserve all method sets that can possibly be used in the program in a type assert, interface assert or interface method call. In the future, this logic will need to be revisited again when reflect.New or reflect.Zero gets implemented. Code size increases a bit in some cases, but usually in a very limited way (except for one outlier in the drivers smoke tests). The next commit will improve the situation significantly.
118 строки
3,8 КиБ
LLVM
118 строки
3,8 КиБ
LLVM
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "armv7m-none-eabi"
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%runtime.typecodeID = type { %runtime.typecodeID*, i32, %runtime.interfaceMethodInfo* }
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%runtime.interfaceMethodInfo = type { i8*, i32 }
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@"reflect/types.type:basic:uint8" = external constant %runtime.typecodeID
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@"reflect/types.type:basic:int" = external constant %runtime.typecodeID
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@"func NeverImplementedMethod()" = external constant i8
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@"func Double() int" = external constant i8
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@"reflect/types.type:named:Number" = private constant %runtime.typecodeID zeroinitializer
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declare i1 @runtime.interfaceImplements(i32, i8**)
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declare i1 @runtime.typeAssert(i32, %runtime.typecodeID*)
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declare i32 @runtime.interfaceMethod(i32, i8**, i8*)
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declare void @runtime.printuint8(i8)
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declare void @runtime.printint32(i32)
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declare void @runtime.printptr(i32)
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declare void @runtime.printnl()
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declare void @runtime.nilPanic(i8*, i8*)
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define void @printInterfaces() {
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call void @printInterface(i32 4, i8* inttoptr (i32 5 to i8*))
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call void @printInterface(i32 16, i8* inttoptr (i8 120 to i8*))
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call void @printInterface(i32 68, i8* inttoptr (i32 3 to i8*))
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ret void
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}
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define void @printInterface(i32 %typecode, i8* %value) {
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%typeassert.ok1 = call i1 @"Unmatched$typeassert"(i32 %typecode)
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br i1 %typeassert.ok1, label %typeswitch.Unmatched, label %typeswitch.notUnmatched
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typeswitch.Unmatched: ; preds = %0
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%unmatched = ptrtoint i8* %value to i32
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call void @runtime.printptr(i32 %unmatched)
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call void @runtime.printnl()
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ret void
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typeswitch.notUnmatched: ; preds = %0
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%typeassert.ok = call i1 @"Doubler$typeassert"(i32 %typecode)
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br i1 %typeassert.ok, label %typeswitch.Doubler, label %typeswitch.notDoubler
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typeswitch.Doubler: ; preds = %typeswitch.notUnmatched
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%1 = call i32 @"(Doubler).Double"(i8* %value, i8* null, i32 %typecode, i8* null)
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call void @runtime.printint32(i32 %1)
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ret void
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typeswitch.notDoubler: ; preds = %typeswitch.notUnmatched
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%typeassert.ok2 = icmp eq i32 16, %typecode
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br i1 %typeassert.ok2, label %typeswitch.byte, label %typeswitch.notByte
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typeswitch.byte: ; preds = %typeswitch.notDoubler
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%byte = ptrtoint i8* %value to i8
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call void @runtime.printuint8(i8 %byte)
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call void @runtime.printnl()
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ret void
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typeswitch.notByte: ; preds = %typeswitch.notDoubler
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ret void
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}
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define i32 @"(Number).Double"(i32 %receiver, i8* %parentHandle) {
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%ret = mul i32 %receiver, 2
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ret i32 %ret
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}
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define i32 @"(Number).Double$invoke"(i8* %receiverPtr, i8* %parentHandle) {
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%receiver = ptrtoint i8* %receiverPtr to i32
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%ret = call i32 @"(Number).Double"(i32 %receiver, i8* null)
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ret i32 %ret
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}
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define internal i32 @"(Doubler).Double"(i8* %0, i8* %1, i32 %actualType, i8* %parentHandle) unnamed_addr {
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entry:
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switch i32 %actualType, label %default [
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i32 68, label %"reflect/types.type:named:Number"
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]
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default: ; preds = %entry
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call void @runtime.nilPanic(i8* undef, i8* undef)
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unreachable
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"reflect/types.type:named:Number": ; preds = %entry
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%2 = call i32 @"(Number).Double$invoke"(i8* %0, i8* %1)
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ret i32 %2
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}
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define internal i1 @"Doubler$typeassert"(i32 %actualType) unnamed_addr {
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entry:
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switch i32 %actualType, label %else [
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i32 68, label %then
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]
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then: ; preds = %entry
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ret i1 true
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else: ; preds = %entry
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ret i1 false
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}
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define internal i1 @"Unmatched$typeassert"(i32 %actualType) unnamed_addr {
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entry:
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switch i32 %actualType, label %else [
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]
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then: ; No predecessors!
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ret i1 true
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else: ; preds = %entry
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ret i1 false
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}
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