69dcdbd2ba
For async preemption, we will be using REGTMP as a temporary register in injected call on MIPS, which will clobber it. So any code that uses REGTMP is not safe for async preemption. In the assembler backend, we expand a Prog to multiple machine instructions and use REGTMP as a temporary register if necessary. These need to be marked unsafe. In fact, most of the multi-instruction Progs use REGTMP, so we mark all of them, except ones that are whitelisted. Change-Id: Ic00ae5589683c2c9525abdaee076d884df6b0d1e Reviewed-on: https://go-review.googlesource.com/c/go/+/203718 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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