2b58ca6e3d
For the entry block, make the "first instruction" be truly the first instruction. This allows printing of incoming parameters with Delve. Also be sure Phis are marked as being at the start of their block. This is observed to move location list pointers, and where moved, they become correct. Leading zero-width instructions include LoweredGetClosurePtr. Because this instruction is actually architecture-specific, and it is now tested for in 3 different places, also created Op.isLoweredGetClosurePtr() to reduce future surprises. Change-Id: Ic043b7265835cf1790382a74334b5714ae4060af Reviewed-on: https://go-review.googlesource.com/c/145179 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Heschi Kreinick <heschi@google.com>
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