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interp: support GEP on fixed (MMIO) addresses

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GetElementPtr would not work on values that weren't pointers. Because
fixed addresses (often used in memory-mapped I/O) are integers rather
than pointers in interp, it would return an error.

This resulted in the teensy40 target not compiling correctly since the
interp package rewrite. This commit should fix that.
This commit is contained in:
Ayke van Laethem
2021-02-22 20:49:02 +01:00
parent 5917b8baa2
commit f50758ca5a
4 changed files with 21 additions and 8 deletions
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interp/errors.go
+2 -4
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@@ -11,19 +11,17 @@ import (
"tinygo.org/x/go-llvm"
)
var errLiteralToPointer = errors.New("interp: trying to convert literal value to pointer")
// These errors are expected during normal execution and can be recovered from
// by running the affected function at runtime instead of compile time.
var (
errExpectedPointer = errors.New("interp: trying to use an integer as a pointer (memory-mapped I/O?)")
errIntegerAsPointer = errors.New("interp: trying to use an integer as a pointer (memory-mapped I/O?)")
errUnsupportedInst = errors.New("interp: unsupported instruction")
errUnsupportedRuntimeInst = errors.New("interp: unsupported instruction (to be emitted at runtime)")
errMapAlreadyCreated = errors.New("interp: map already created")
)
func isRecoverableError(err error) bool {
return err == errExpectedPointer || err == errUnsupportedInst || err == errUnsupportedRuntimeInst || err == errMapAlreadyCreated
return err == errIntegerAsPointer || err == errUnsupportedInst || err == errUnsupportedRuntimeInst || err == errMapAlreadyCreated
}
// ErrorLine is one line in a traceback. The position may be missing.