57271d7eaa
There is no good reason for func values to refer to interface type codes. The only thing they need is a stable identifier for function signatures, which is easily created as a new kind of globals. Decoupling makes it easier to change interface related code.
71 строка
3 КиБ
LLVM
71 строка
3 КиБ
LLVM
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown-wasm"
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%runtime.funcValueWithSignature = type { i32, i8* }
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@"reflect/types.funcid:func:{basic:uint8}{}" = external constant i8
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@"reflect/types.funcid:func:{basic:int}{}" = external constant i8
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@"reflect/types.funcid:func:{}{basic:uint32}" = external constant i8
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@"func1Uint8$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i8, i8*, i8*)* @func1Uint8 to i32), i8* @"reflect/types.funcid:func:{basic:uint8}{}" }
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@"func2Uint8$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i8, i8*, i8*)* @func2Uint8 to i32), i8* @"reflect/types.funcid:func:{basic:uint8}{}" }
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@"main$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i32, i8*, i8*)* @"main$1" to i32), i8* @"reflect/types.funcid:func:{basic:int}{}" }
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@"main$2$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i32, i8*, i8*)* @"main$2" to i32), i8* @"reflect/types.funcid:func:{basic:int}{}" }
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declare i32 @runtime.getFuncPtr(i8*, i32, i8*, i8*, i8*)
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declare void @"internal/task.start"(i32, i8*, i32, i8*, i8*)
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declare void @runtime.nilPanic(i8*, i8*)
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declare void @"main$1"(i32, i8*, i8*)
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declare void @"main$2"(i32, i8*, i8*)
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declare void @func1Uint8(i8, i8*, i8*)
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declare void @func2Uint8(i8, i8*, i8*)
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; There are no functions with this signature used in a func value.
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; This means that this should unconditionally nil panic.
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define i32 @runFuncNone(i8*, i32, i8* %context, i8* %parentHandle) {
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entry:
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%2 = call i32 @runtime.getFuncPtr(i8* %0, i32 %1, i8* @"reflect/types.funcid:func:{}{basic:uint32}", i8* undef, i8* null)
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%3 = inttoptr i32 %2 to i32 (i8*, i8*)*
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%4 = icmp eq i32 (i8*, i8*)* %3, null
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br i1 %4, label %fpcall.nil, label %fpcall.next
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fpcall.nil:
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call void @runtime.nilPanic(i8* undef, i8* null)
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unreachable
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fpcall.next:
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%5 = call i32 %3(i8* %0, i8* undef)
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ret i32 %5
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}
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; There are two functions with this signature used in a func value. That means
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; that we'll have to check at runtime which of the two it is (or whether the
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; func value is nil). This call will thus be lowered to a switch statement.
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define void @runFunc2(i8*, i32, i8, i8* %context, i8* %parentHandle) {
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entry:
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%3 = call i32 @runtime.getFuncPtr(i8* %0, i32 %1, i8* @"reflect/types.funcid:func:{basic:uint8}{}", i8* undef, i8* null)
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%4 = inttoptr i32 %3 to void (i8, i8*, i8*)*
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%5 = icmp eq void (i8, i8*, i8*)* %4, null
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br i1 %5, label %fpcall.nil, label %fpcall.next
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fpcall.nil:
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call void @runtime.nilPanic(i8* undef, i8* null)
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unreachable
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fpcall.next:
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call void %4(i8 %2, i8* %0, i8* undef)
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ret void
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}
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; Special case for internal/task.start.
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define void @sleepFuncValue(i8*, i32, i8* nocapture readnone %context, i8* nocapture readnone %parentHandle) {
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entry:
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%2 = call i32 @runtime.getFuncPtr(i8* %0, i32 %1, i8* @"reflect/types.funcid:func:{basic:int}{}", i8* undef, i8* null)
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call void @"internal/task.start"(i32 %2, i8* null, i32 undef, i8* undef, i8* null)
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ret void
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}
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