Commit b5b35be2 authored by Austin Clements's avatar Austin Clements

cmd/compile: don't inline functions that call recover

recover determines whether it's being called by a deferred frame by
matching its caller's argument frame pointer with the one recorded in
the panic object. That means its caller needs a valid and unique
argument frame pointer, so it must not be inlined.

With this fix, test/recover.go passes with -l=4.

Fixes #23557.

Change-Id: I1f32a624c49e387cfc67893a0829bb248d69c3d4
Reviewed-on: https://go-review.googlesource.com/90035
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: 's avatarCherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
parent 651ddbdb
......@@ -314,12 +314,18 @@ func (v *hairyVisitor) visit(n *Node) bool {
}
// Things that are too hairy, irrespective of the budget
case OCALL, OCALLINTER, OPANIC, ORECOVER:
case OCALL, OCALLINTER, OPANIC:
if Debug['l'] < 4 {
v.reason = "non-leaf op " + n.Op.String()
return true
}
case ORECOVER:
// recover matches the argument frame pointer to find
// the right panic value, so it needs an argument frame.
v.reason = "call to recover"
return true
case OCLOSURE,
OCALLPART,
ORANGE,
......
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