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cmd/compile: prevent inlining go:yeswritebarrierrec functions

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Fixes #22342.

Change-Id: Ic942162e98dce5749e381a31d58b0bf16c7d6f98
Reviewed-on: https://go-review.googlesource.com/72132
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
Matthew Dempsky 2017-10-20 14:20:48 -07:00
parent 5c18a3ca70
commit 4e64ee423c
1 changed files with 9 additions and 0 deletions
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9
src/cmd/compile/internal/gc/inl.go
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@ -117,6 +117,15 @@ func caninl(fn *Node) {
return
}
// The nowritebarrierrec checker currently works at function
// granularity, so inlining yeswritebarrierrec functions can
// confuse it (#22342). As a workaround, disallow inlining
// them for now.
if fn.Func.Pragma&Yeswritebarrierrec != 0 {
reason = "marked go:yeswritebarrierrec"
return
}
// If fn has no body (is defined outside of Go), cannot inline it.
if fn.Nbody.Len() == 0 {
reason = "no function body"