cmd/compile: don't inline from norace packages in race mode
In race mode (or other instrumentation mode), if the caller is in
a regular package and the callee is in a norace (or noinstrument)
package, don't inline. Otherwise, when the caller is instumented
it will also affect the inlined callee.
An example is sync.(*Mutex).Unlock, which is typically not inlined
but with PGO it can be inlined into a regular function, which is
then get instrumented. But the rest of the sync package, in
particular, the Lock function is not instrumented, causing the
race detector to signal false race.
Change-Id: Ia78bb602c6da63a34ec2909b9a82646bf20873f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/495595
Run-TryBot: Cherry Mui <cherryyz@google.com> Reviewed-by: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>