CC @laboger

Change https://golang.org/cl/64970 mentions this issue: cmd/compile: fix regression in PPC64.rules move zero

When a MOVD instruction is used the offset field must be a multiple of 4. We had seen this problem a few months ago but MOVDstorezero did not get fixed at that time.

It can be reproduced when there is a function with something like this:

type Hash [32]byte

func testbool() (bool, Hash) {
        var h Hash
        return true, h 
}

When there is a MOVDstorezero to data that is >= 8 bytes but not nicely aligned, you can hit this error.

This should be backported to go 1.9.

I saw there was an announcement about go 1.9.1. Will this make it in there?

I think 1.9.1 is going to be a security releases, so all the 1.9.1 issues will be bumped to 1.9.2.

But I'll reopen this one now so that it is considered for 1.9.2.

Is it bound with #22047 in any way?

No, not related to #22047, the failure in this issue would show up as a compile time error, because in the rare case where the field being zeroed is not aligned to 4 bytes as required by the instruction, the assembler would issue an error message and fail the compile.

CL 64970 OK for Go 1.9.2.

Change https://golang.org/cl/70978 mentions this issue: [release-branch.go1.9] cmd/compile: fix regression in PPC64.rules move zero

go1.9.2 has been packaged and includes:

• CL 64970

The release is posted at golang.org/dl.

— golang.org/x/build/cmd/releasebot, Oct 26 21:09:16 UTC