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cppgc: Change calling convention for slow write barrier bailout

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Change the calling convention for the slow write barrier call to allow
callers to avoid saving caller-saved registers.

Bug: chromium:1406464
Change-Id: I314bdacb235727e0e78a192ed7cbff09e9bc6b4b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4156476
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#85254}
This commit is contained in:
Michael Lippautz 2023-01-11 21:01:17 +01:00 committed by V8 LUCI CQ
parent 25f779623d
commit c020a31092
1 changed files with 2 additions and 1 deletions
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3
include/cppgc/internal/write-barrier.h
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@ -83,7 +83,8 @@ class V8_EXPORT WriteBarrier final {
// A write barrier that combines `GenerationalBarrier()` and
// `DijkstraMarkingBarrier()`. We only pass a single parameter here to clobber
// as few registers as possible.
static V8_NOINLINE void CombinedWriteBarrierSlow(const void* slot);
static V8_NOINLINE void V8_PRESERVE_MOST
CombinedWriteBarrierSlow(const void* slot);
#endif // CPPGC_SLIM_WRITE_BARRIER
static V8_INLINE void DijkstraMarkingBarrier(const Params& params,