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cmd/preprofile: Add preprocess tool to pre-parse the profile file.

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The pgo compilation time is very long if the profile file is large.
We added a preprocess tool to pre-parse profile file in order to
expedite the compile time.

Change-Id: I6f50bbd01f242448e2463607a9b63483c6ca9a12
Reviewed-on: https://go-review.googlesource.com/c/go/+/529738
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Jin Lin 2023-09-20 12:22:26 -07:00 • committed by Michael Pratt
parent 6e7aee5f6b
commit b7ae16e04b
6 changed files with 453 additions and 47 deletions
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2
src/cmd/compile/internal/base/flag.go
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@ -124,7 +124,7 @@ type CmdFlags struct {
TraceProfile string "help:\"write an execution trace to `file`\""
TrimPath string "help:\"remove `prefix` from recorded source file paths\""
WB bool "help:\"enable write barrier\"" // TODO: remove
PgoProfile string "help:\"read profile from `file`\""
PgoProfile string "help:\"read profile or pre-process profile from `file`\""
ErrorURL bool "help:\"print explanatory URL with error message if applicable\""
// Configuration derived from flags; not a flag itself.