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Revert "cmd/compile, cmd/link, runtime: make defers low-cost through inline code and extra funcdata"

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This reverts CL 190098.

Reason for revert: broke several builders.

Change-Id: I69161352f9ded02537d8815f259c4d391edd9220
Reviewed-on: https://go-review.googlesource.com/c/go/+/201519
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Dan Scales <danscales@google.com>
This commit is contained in:
Bryan C. Mills 2019-10-16 20:41:53 +00:00
parent 2718789bc7
commit b76e6f8825
27 changed files with 145 additions and 1187 deletions
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4
src/runtime/stack.go
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@ -91,7 +91,7 @@ const (
// The stack guard is a pointer this many bytes above the
// bottom of the stack.
_StackGuard = 896*sys.StackGuardMultiplier + _StackSystem
_StackGuard = 880*sys.StackGuardMultiplier + _StackSystem
// After a stack split check the SP is allowed to be this
// many bytes below the stack guard. This saves an instruction
@ -736,8 +736,6 @@ func adjustdefers(gp *g, adjinfo *adjustinfo) {
adjustpointer(adjinfo, unsafe.Pointer(&d.sp))
adjustpointer(adjinfo, unsafe.Pointer(&d._panic))
adjustpointer(adjinfo, unsafe.Pointer(&d.link))
adjustpointer(adjinfo, unsafe.Pointer(&d.varp))
adjustpointer(adjinfo, unsafe.Pointer(&d.fd))
}
// Adjust defer argument blocks the same way we adjust active stack frames.