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compiler: implement internal/abi.Escape

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This commit is contained in:
Ayke van Laethem
2025-08-04 10:27:41 +02:00
committed by Ron Evans
parent 5c46efb4d1
commit 34efc3a381
3 changed files with 47 additions and 0 deletions
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compiler/symbol.go
+17
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@@ -253,6 +253,23 @@ func (c *compilerContext) maybeCreateSyntheticFunction(fn *ssa.Function, llvmFn
// The exception is the package initializer, which does appear in the
// *ssa.Package members and so shouldn't be created here.
if fn.Synthetic != "" && fn.Synthetic != "package initializer" && fn.Synthetic != "generic function" && fn.Synthetic != "range-over-func yield" {
if origin := fn.Origin(); origin != nil && origin.RelString(nil) == "internal/abi.Escape" {
// This is a special implementation or internal/abi.Escape, which
// can only really be implemented in the compiler.
// For simplicity we'll only implement pointer parameters for now.
if _, ok := fn.Params[0].Type().Underlying().(*types.Pointer); ok {
irbuilder := c.ctx.NewBuilder()
defer irbuilder.Dispose()
b := newBuilder(c, irbuilder, fn)
b.createAbiEscapeImpl()
llvmFn.SetLinkage(llvm.LinkOnceODRLinkage)
llvmFn.SetUnnamedAddr(true)
}
// If the parameter is not of a pointer type, it will be left
// unimplemented. This will result in a linker error if the function
// is really called, making it clear it needs to be implemented.
return
}
if len(fn.Blocks) == 0 {
c.addError(fn.Pos(), "missing function body")
return