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cmd/compile: add flag for debugging PC-value tables

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For example, `-d pctab=pctoinline` prints the PC-inline table and
inlining tree for every function.

Change-Id: Ia6b9ce4d83eed0b494318d40ffe06481ec5d58ab
Reviewed-on: https://go-review.googlesource.com/37235
Run-TryBot: David Lazar <lazard@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
David Lazar 2017-02-17 16:55:40 -05:00
parent 301149b9e4
commit 0824ae6dc1
4 changed files with 26 additions and 19 deletions
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5
src/cmd/compile/internal/gc/main.go
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@ -37,6 +37,7 @@ var (
Debug_panic int
Debug_slice int
Debug_wb int
Debug_pctab string
)
// Debug arguments.
@ -59,6 +60,7 @@ var debugtab = []struct {
{"typeassert", &Debug_typeassert}, // print information about type assertion inlining
{"wb", &Debug_wb}, // print information about write barriers
{"export", &Debug_export}, // print export data
{"pctab", &Debug_pctab}, // print named pc-value table
}
func usage() {
@ -319,6 +321,9 @@ func Main() {
}
}
// set via a -d flag
Ctxt.Debugpcln = Debug_pctab
// enable inlining. for now:
// default: inlining on. (debug['l'] == 1)
// -l: inlining off (debug['l'] == 0)