Hi Sam,
The builtin is defined in lib/SILGen/SILGenBuiltin.cpp, look for the function
named emitBuiltinLoadRaw().
However I suspect the problem in this case is not that the builtin is
implemented incorrectly (it eventually lowers to an LLVM load instruction) but
that something further upstream is going wrong, perhaps with alignment or
endianness.
Can you tell us which unit tests are failing specifically?
Slava
> On Sep 28, 2017, at 2:16 PM, Sam Ding via swift-dev <swift-dev@swift.org>
> wrote:
>
> I am testing a test case "KeyPath.swift" on s390x for v4.0 . It is found that
> " Builtin.loadRaw" as the below of
> "stdlib/public/core/UnsafeRawPointer.swift.gyb" returns a different value
> than that on x86-64.
> @_inlineable
> public func load<T>(fromByteOffset offset: Int = 0, as type: T.Type) -> T {
> _debugPrecondition(0 == (UInt(bitPattern: self + offset)
> & (UInt(MemoryLayout<T>.alignment) - 1)),
> "load from misaligned raw pointer")
>
> return Builtin.loadRaw((self + offset)._rawValue) // return a different value
> on s390x vs x86-64
> }
> My debugger (lldb) does not guide me to the detailed of " Builtin.loadRaw".
> Searching "loadRaw" and finding
> swift/include/swift/AST/Builtins.def:BUILTIN_SIL_OPERATION(LoadRaw,
> "loadRaw", Special)
>
> But I could not find the definition of this "LoadRaw" from the whole swift v4.
> Can anyone give me a hint where its implementation is?
>
> Thanks,
>
>
> Sam Ding,
> Linux on z Systems Open Source Ecosystem
> IBM Toronto Lab,
> email: samd...@ca.ibm.com
> phone: (905)413-2947
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> swift-dev mailing list
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