727ebce6ce
Even if a block is empty, we need to keep track of whether the end-of-block instructions are preemptible. This CL allows us to not mark the load+compare in instruction sequences like CMPL $0, runtime·writeBarrier(SB) JEQ ... Before, we had to mark the CMPL as uninterruptible because there was no way to mark just the JEQ. Now there is, so there is no need to mark the CMPL itself. Change-Id: I4c27c0dc211c03b14637d420899cd2c2cccf3493 Reviewed-on: https://go-review.googlesource.com/c/go/+/518539 Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Keith Randall <khr@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Keith Randall <khr@golang.org> |
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The Go Programming Language
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