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cmd/compile: add support for a go:noinline directive

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Some tests need to disable inlining of a function.  It's currently done
in one of a few ways (adding a function call, an empty switch, or a
defer).  Add support for a less fragile 'go:noinline' directive that
prevents inlining.

Fixes #12312

Change-Id: Ife444e13361b4a927709d81aa41e448f32eec8d4
Reviewed-on: https://go-review.googlesource.com/13911
Run-TryBot: Todd Neal <todd@tneal.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
This commit is contained in:
Todd Neal 2015-08-24 19:45:59 -05:00
parent c9b8cab16c
commit a92543e1a1
7 changed files with 144 additions and 119 deletions
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5
src/cmd/compile/internal/gc/lex.go
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@ -1662,6 +1662,11 @@ func getlinepragma() int {
return c
}
if verb == "go:noinline" {
noinline = true
return c
}
if verb == "go:systemstack" {
if compiling_runtime == 0 {
Yyerror("//go:systemstack only allowed in runtime")