0323895cc0
Prior to this CL, the SSA backend reported violations of the //go:nowritebarrier annotation immediately. This necessitated emitting errors during SSA compilation, which is not compatible with a concurrent backend. Instead, check for such violations later. We already save the data required to do a late check for violations of the //go:nowritebarrierrec annotation. Use the same data, and check //go:nowritebarrier at the same time. One downside to doing this is that now only a single violation will be reported per function. Given that this is for the runtime only, and violations are rare, this seems an acceptable cost. While we are here, remove several 'nerrors != 0' checks that are rendered pointless. Updates #15756 Fixes #19250 (as much as it ever can be) Change-Id: Ia44c4ad5b6fd6f804d9f88d9571cec8d23665cb3 Reviewed-on: https://go-review.googlesource.com/38973 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
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