8462169b5a
There's a problem in liveness, where liveness of any part of an aggregate keeps the whole aggregate alive, but the not-live parts don't get spilled. The GC can observe those live-but-not-spilled slots, which can contain junk. A better fix is to change liveness to work pointer-by-pointer, but that is also a riskier, trickier fix. To avoid this, in the case of (1) an aggregate input parameter (2) containing pointers (3) passed in registers pre-spill the pointers. Updates #40724. Change-Id: I6beb8e0a353b1ae3c68c16072f56698061922c04 Reviewed-on: https://go-review.googlesource.com/c/go/+/307909 Trust: David Chase <drchase@google.com> Run-TryBot: David Chase <drchase@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com> |
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