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cmd/compile: improve debugging output for GOSSAFUNC

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This changes the assembly language output to use the
innermost (instead of outermost) position for line
number and file.

The file is printed separately, only when it changes,
to remove redundant and space-consuming noise from the
output.

Unknown positions have line number "?"

The output format was changed slightly to make it
easier to read.

One source of gratuitous variation in debugging output was
removed.

Change-Id: I1fd9c8b0ddd82766488582fb684dce4b04f35723
Reviewed-on: https://go-review.googlesource.com/78895
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
David Chase 2017-11-20 16:47:08 -05:00
parent 4a3d408d18
commit bd41c6783b
6 changed files with 40 additions and 19 deletions
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2
src/cmd/compile/internal/gc/main.go
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@ -398,7 +398,7 @@ func Main(archInit func(*Arch)) {
// enable inlining. for now:
// default: inlining on. (debug['l'] == 1)
// -l: inlining off (debug['l'] == 0)
// -ll, -lll: inlining on again, with extra debugging (debug['l'] > 1)
// -l=2, -l=3: inlining on again, with extra debugging (debug['l'] > 1)
if Debug['l'] <= 1 {
Debug['l'] = 1 - Debug['l']
}