cmd/compile: add opcode flag hasSideEffects for do-not-remove
Added a flag to generic and various architectures' atomic operations that are judged to have observable side effects and thus cannot be dead-code-eliminated. Test requires GOMAXPROCS > 1 without preemption in loop. Fixes #19182. Change-Id: Id2230031abd2cca0bbb32fd68fc8a58fb912070f Reviewed-on: https://go-review.googlesource.com/37333 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:Cherry Zhang <cherryyz@google.com>
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test/fixedbugs/issue19182.go
0 → 100644
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