compiler: implement method-set based AssignableTo and Implements (#5304)

* reflect: implement method-set based AssignableTo and Implements

Based on the design from #4376 by aykevl.
Fixes #4277, fixes #3580.

Co-authored-by: Ayke van Laethem <aykevanlaethem@gmail.com>

* builder: update expected binary sizes for reflect changes

* Make interface checks similar to invoke, allowing typeImplementsMethodSet and method info to be dropped when reflect is not present

* Add more tests that BigGo reflect tests

* Even more pruning

* Add go/token and net/url to passing tests

* Prune even further, I am less happy with this, though

* Update size test now that we are smaller

* Skip some tests

* elide method lists

* format, oops

* fix tests

* Add a panic, pull out constant to keep in sync

* Add debug info

* Remove code that was leftover from a previous refactor

---------

Co-authored-by: Ayke van Laethem <aykevanlaethem@gmail.com>

transform/testdata/interface.out.ll

@@ -12,14 +12,8 @@ declare void @runtime.printuint8(i8)
 
 declare void @runtime.printint16(i16)
 
-declare void @runtime.printint32(i32)
-
-declare void @runtime.printptr(i32)
-
 declare void @runtime.printnl()
 
-declare void @runtime.nilPanic(ptr)
-
 define void @printInterfaces() {
   call void @printInterface(ptr @"reflect/types.type:basic:int", ptr inttoptr (i32 5 to ptr))
   call void @printInterface(ptr @"reflect/types.type:basic:uint8", ptr inttoptr (i8 120 to ptr))
@@ -28,35 +22,16 @@ define void @printInterfaces() {
 }
 
 define void @printInterface(ptr %typecode, ptr %value) {
-  %isUnmatched = call i1 @"Unmatched$typeassert"(ptr %typecode)
-  br i1 %isUnmatched, label %typeswitch.Unmatched, label %typeswitch.notUnmatched
-
-typeswitch.Unmatched:                             ; preds = %0
-  %unmatched = ptrtoint ptr %value to i32
-  call void @runtime.printptr(i32 %unmatched)
-  call void @runtime.printnl()
-  ret void
-
-typeswitch.notUnmatched:                          ; preds = %0
-  %isDoubler = call i1 @"Doubler$typeassert"(ptr %typecode)
-  br i1 %isDoubler, label %typeswitch.Doubler, label %typeswitch.notDoubler
-
-typeswitch.Doubler:                               ; preds = %typeswitch.notUnmatched
-  %doubler.result = call i32 @"Doubler.Double$invoke"(ptr %value, ptr %typecode, ptr undef)
-  call void @runtime.printint32(i32 %doubler.result)
-  ret void
-
-typeswitch.notDoubler:                            ; preds = %typeswitch.notUnmatched
   %typeassert.ok = icmp eq ptr @"reflect/types.type:basic:uint8", %typecode
   br i1 %typeassert.ok, label %typeswitch.byte, label %typeswitch.notByte
 
-typeswitch.byte:                                  ; preds = %typeswitch.notDoubler
+typeswitch.byte:                                  ; preds = %0
   %byte = ptrtoint ptr %value to i8
   call void @runtime.printuint8(i8 %byte)
   call void @runtime.printnl()
   ret void
 
-typeswitch.notByte:                               ; preds = %typeswitch.notDoubler
+typeswitch.notByte:                               ; preds = %0
   br i1 false, label %typeswitch.int16, label %typeswitch.notInt16
 
 typeswitch.int16:                                 ; preds = %typeswitch.notByte
@@ -79,41 +54,3 @@ define i32 @"(Number).Double$invoke"(ptr %receiverPtr, ptr %context) {
   %ret = call i32 @"(Number).Double"(i32 %receiver, ptr undef)
   ret i32 %ret
 }
-
-define internal i32 @"Doubler.Double$invoke"(ptr %receiver, ptr %actualType, ptr %context) unnamed_addr #0 {
-entry:
-  %"named:Number.icmp" = icmp eq ptr %actualType, @"reflect/types.type:named:Number"
-  br i1 %"named:Number.icmp", label %"named:Number", label %"named:Number.next"
-
-"named:Number":                                   ; preds = %entry
-  %0 = call i32 @"(Number).Double$invoke"(ptr %receiver, ptr undef)
-  ret i32 %0
-
-"named:Number.next":                              ; preds = %entry
-  call void @runtime.nilPanic(ptr undef)
-  unreachable
-}
-
-define internal i1 @"Doubler$typeassert"(ptr %actualType) unnamed_addr #1 {
-entry:
-  %"named:Number.icmp" = icmp eq ptr %actualType, @"reflect/types.type:named:Number"
-  br i1 %"named:Number.icmp", label %then, label %"named:Number.next"
-
-then:                                             ; preds = %entry
-  ret i1 true
-
-"named:Number.next":                              ; preds = %entry
-  ret i1 false
-}
-
-define internal i1 @"Unmatched$typeassert"(ptr %actualType) unnamed_addr #2 {
-entry:
-  ret i1 false
-
-then:                                             ; No predecessors!
-  ret i1 true
-}
-
-attributes #0 = { "tinygo-invoke"="reflect/methods.Double() int" "tinygo-methods"="reflect/methods.Double() int" }
-attributes #1 = { "tinygo-methods"="reflect/methods.Double() int" }
-attributes #2 = { "tinygo-methods"="reflect/methods.NeverImplementedMethod()" }