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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.out.ll
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+1 -12
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@@ -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*)