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compiler: decouple func lowering from interface type codes

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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.
This commit is contained in:
Ayke van Laethem
2021-04-11 02:00:01 +02:00
committed by Ron Evans
parent 8383552552
commit 57271d7eaa
8 changed files with 48 additions and 45 deletions
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transform/testdata/func-lowering.ll
Vendored
+12 -13
View File
@@ -1,18 +1,17 @@
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown-wasm"
%runtime.typecodeID = type { %runtime.typecodeID*, i32 }
%runtime.funcValueWithSignature = type { i32, %runtime.typecodeID* }
%runtime.funcValueWithSignature = type { i32, i8* }
@"reflect/types.type:func:{basic:uint8}{}" = external constant %runtime.typecodeID
@"reflect/types.type:func:{basic:int}{}" = external constant %runtime.typecodeID
@"reflect/types.type:func:{}{basic:uint32}" = external constant %runtime.typecodeID
@"func1Uint8$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i8, i8*, i8*)* @func1Uint8 to i32), %runtime.typecodeID* @"reflect/types.type:func:{basic:uint8}{}" }
@"func2Uint8$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i8, i8*, i8*)* @func2Uint8 to i32), %runtime.typecodeID* @"reflect/types.type:func:{basic:uint8}{}" }
@"main$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i32, i8*, i8*)* @"main$1" to i32), %runtime.typecodeID* @"reflect/types.type:func:{basic:int}{}" }
@"main$2$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i32, i8*, i8*)* @"main$2" to i32), %runtime.typecodeID* @"reflect/types.type:func:{basic:int}{}" }
@"reflect/types.funcid:func:{basic:uint8}{}" = external constant i8
@"reflect/types.funcid:func:{basic:int}{}" = external constant i8
@"reflect/types.funcid:func:{}{basic:uint32}" = external constant i8
@"func1Uint8$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i8, i8*, i8*)* @func1Uint8 to i32), i8* @"reflect/types.funcid:func:{basic:uint8}{}" }
@"func2Uint8$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i8, i8*, i8*)* @func2Uint8 to i32), i8* @"reflect/types.funcid:func:{basic:uint8}{}" }
@"main$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i32, i8*, i8*)* @"main$1" to i32), i8* @"reflect/types.funcid:func:{basic:int}{}" }
@"main$2$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i32, i8*, i8*)* @"main$2" to i32), i8* @"reflect/types.funcid:func:{basic:int}{}" }
declare i32 @runtime.getFuncPtr(i8*, i32, %runtime.typecodeID*, i8*, i8*)
declare i32 @runtime.getFuncPtr(i8*, i32, i8*, i8*, i8*)
declare void @"internal/task.start"(i32, i8*, i32, i8*, i8*)
@@ -30,7 +29,7 @@ declare void @func2Uint8(i8, i8*, i8*)
; This means that this should unconditionally nil panic.
define i32 @runFuncNone(i8*, i32, i8* %context, i8* %parentHandle) {
entry:
%2 = call i32 @runtime.getFuncPtr(i8* %0, i32 %1, %runtime.typecodeID* @"reflect/types.type:func:{}{basic:uint32}", i8* undef, i8* null)
%2 = call i32 @runtime.getFuncPtr(i8* %0, i32 %1, i8* @"reflect/types.funcid:func:{}{basic:uint32}", i8* undef, i8* null)
%3 = inttoptr i32 %2 to i32 (i8*, i8*)*
%4 = icmp eq i32 (i8*, i8*)* %3, null
br i1 %4, label %fpcall.nil, label %fpcall.next
@@ -49,7 +48,7 @@ fpcall.next:
; func value is nil). This call will thus be lowered to a switch statement.
define void @runFunc2(i8*, i32, i8, i8* %context, i8* %parentHandle) {
entry:
%3 = call i32 @runtime.getFuncPtr(i8* %0, i32 %1, %runtime.typecodeID* @"reflect/types.type:func:{basic:uint8}{}", i8* undef, i8* null)
%3 = call i32 @runtime.getFuncPtr(i8* %0, i32 %1, i8* @"reflect/types.funcid:func:{basic:uint8}{}", i8* undef, i8* null)
%4 = inttoptr i32 %3 to void (i8, i8*, i8*)*
%5 = icmp eq void (i8, i8*, i8*)* %4, null
br i1 %5, label %fpcall.nil, label %fpcall.next
@@ -66,7 +65,7 @@ fpcall.next:
; Special case for internal/task.start.
define void @sleepFuncValue(i8*, i32, i8* nocapture readnone %context, i8* nocapture readnone %parentHandle) {
entry:
%2 = call i32 @runtime.getFuncPtr(i8* %0, i32 %1, %runtime.typecodeID* @"reflect/types.type:func:{basic:int}{}", i8* undef, i8* null)
%2 = call i32 @runtime.getFuncPtr(i8* %0, i32 %1, i8* @"reflect/types.funcid:func:{basic:int}{}", i8* undef, i8* null)
call void @"internal/task.start"(i32 %2, i8* null, i32 undef, i8* undef, i8* null)
ret void
}
transform/testdata/func-lowering.out.ll
Vendored
+1 -12
View File
@@ -1,18 +1,7 @@
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown-wasm"
%runtime.typecodeID = type { %runtime.typecodeID*, i32 }
%runtime.funcValueWithSignature = type { i32, %runtime.typecodeID* }
@"reflect/types.type:func:{basic:uint8}{}" = external constant %runtime.typecodeID
@"reflect/types.type:func:{basic:int}{}" = external constant %runtime.typecodeID
@"reflect/types.type:func:{}{basic:uint32}" = external constant %runtime.typecodeID
@"func1Uint8$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i8, i8*, i8*)* @func1Uint8 to i32), %runtime.typecodeID* @"reflect/types.type:func:{basic:uint8}{}" }
@"func2Uint8$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i8, i8*, i8*)* @func2Uint8 to i32), %runtime.typecodeID* @"reflect/types.type:func:{basic:uint8}{}" }
@"main$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i32, i8*, i8*)* @"main$1" to i32), %runtime.typecodeID* @"reflect/types.type:func:{basic:int}{}" }
@"main$2$withSignature" = constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i32, i8*, i8*)* @"main$2" to i32), %runtime.typecodeID* @"reflect/types.type:func:{basic:int}{}" }
declare i32 @runtime.getFuncPtr(i8*, i32, %runtime.typecodeID*, i8*, i8*)
declare i32 @runtime.getFuncPtr(i8*, i32, i8*, i8*, i8*)
declare void @"internal/task.start"(i32, i8*, i32, i8*, i8*)