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[dev.typeparams] cmd/compile, runtime: remove _defer.siz field

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As deferred function now always has zero arguments, _defer.siz is
always 0 and can be removed.

Change-Id: Ibb89f65b2f9d2ba4aeabe50438cc3d4b6a88320b
Reviewed-on: https://go-review.googlesource.com/c/go/+/325921
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
This commit is contained in:
Cherry Mui 2021-06-07 18:18:00 -04:00
parent b80a4c56f0
commit 74b0b2772a
3 changed files with 19 additions and 30 deletions
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5
src/runtime/runtime2.go
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@ -940,14 +940,13 @@ func extendRandom(r []byte, n int) {
// A _defer holds an entry on the list of deferred calls.
// If you add a field here, add code to clear it in freedefer and deferProcStack
// This struct must match the code in cmd/compile/internal/gc/reflect.go:deferstruct
// and cmd/compile/internal/gc/ssa.go:(*state).call.
// This struct must match the code in cmd/compile/internal/ssagen/ssa.go:deferstruct
// and cmd/compile/internal/ssagen/ssa.go:(*state).call.
// Some defers will be allocated on the stack and some on the heap.
// All defers are logically part of the stack, so write barriers to
// initialize them are not required. All defers must be manually scanned,
// and for heap defers, marked.
type _defer struct {
siz int32 // includes both arguments and results
started bool
heap bool
// openDefer indicates that this _defer is for a frame with open-coded