cmd/compile: add missing OINLCAll case in mayModifyPkgVar

CL 395541 made staticopy safe, stop applying the optimization once
seeing an expression that may modify global variables.

However, if a call expression was inlined, the analyzer mis-recognizes
and think that the expression is safe. For example:

	var x = 0
	var a = f()
	var b = x

are re-written to:

	var x = 0
	var a = ~r0
	var b = 0

even though it's not safe because "f()" may modify "x".

Fixing this by recognizing OINLCALL and mark the initialization as
not safe for staticopy.

Fixes #66585

Change-Id: Id930c0b7e74274195f54a498cc4c5a91c4e6d84d
Reviewed-on: https://go-review.googlesource.com/c/go/+/575175
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

0 files changed, 0 insertions, 0 deletions