delta/go-git.git/test/nilptr5.go, branch dev.typeparams github.com: golang/go cmd/compile: fix nilcheck for AIX 2018-11-26T14:13:53+00:00 Clément Chigot clement.chigot@atos.net 2018-10-16T13:59:43+00:00 9fe9853ae5641eda4cfa58015bd0bcedb99c12cb This commit adapts compile tool to create correct nilchecks for AIX. AIX allows to load a nil pointer. Therefore, the default nilcheck which issues a load must be replaced by a CMP instruction followed by a store at 0x0 if the value is nil. The store will trigger a SIGSEGV as on others OS. The nilcheck algorithm must be adapted to do not remove nilcheck if it's only a read. Stores are detected with v.Type.IsMemory(). Tests related to nilptr must be adapted to the previous changements. nilptr.go cannot be used as it's because the AIX address space starts at 1<<32. Change-Id: I9f5aaf0b7e185d736a9b119c0ed2fe4e5bd1e7af Reviewed-on: https://go-review.googlesource.com/c/144538 Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> 
This commit adapts compile tool to create correct nilchecks for AIX.

AIX allows to load a nil pointer. Therefore, the default nilcheck
which issues a load must be replaced by a CMP instruction followed by a
store at 0x0 if the value is nil. The store will trigger a SIGSEGV as on
others OS.

The nilcheck algorithm must be adapted to do not remove nilcheck if it's
only a read. Stores are detected with v.Type.IsMemory().

Tests related to nilptr must be adapted to the previous changements.
nilptr.go cannot be used as it's because the AIX address space starts at
1<<32.

Change-Id: I9f5aaf0b7e185d736a9b119c0ed2fe4e5bd1e7af
Reviewed-on: https://go-review.googlesource.com/c/144538
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>