[PATCH] D49464: [COFF, ARM64] Decide when to mark struct returns as SRet

[Mandeep Singh Grang via Phabricator via llvm-commits]

mgrang added a comment.

@TomTan @haripul As Reid pointed out, MS ARM64 seems to use X1 for returning POD struct address. See https://godbolt.org/g/jQVW78.
 However, the doc at https://docs.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions#return-values only mentions the following:

  The address of the memory block shall be passed as an additional argument to the function in x8 for POD type, or in x0 (or x1 if $this is passed in x0) for non-POD type.

Could you please check if the doc needs to be fixed?


https://reviews.llvm.org/D49464