31e1c30f55
On architectures where G is stored in a register, it is possible for a variable to allocated to it, and subsequently that variable may be spilled and reloaded, for example because of an intervening call. If such an allocation reaches a join point and it is the primary predecessor, it becomes the target of a reload, which is only usually right. Fix: guard all the LoadReg ops, and spill value in the G register (if any) before merges (in the same way that 387 FP registers are freed between blocks). Includes test. Fixes #25504. Change-Id: I0482a53e20970c7315bf09c0e407ae5bba2fe05d Reviewed-on: https://go-review.googlesource.com/114695 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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