Add support for non-scalar pre/postincrement in SPIR-V.

The front end currently only allows scalar pre/post-increment,
so these changes can't be tested in this CL. Tests are in the
followup CL which loosens the frontend restrictions.

Change-Id: I9fea7cb5e7884622b30b32c40a8e6580bfc9dcc5
Bug: b/40045109
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/846700
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
1 file changed