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cmd/preprofile: Implement a tool to preprocess the PGO profile.

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It fixes the issue https://github.com/golang/go/issues/65220.
It also includes  https://go.dev/cl/557458 from Michael.

Change-Id: Ic6109e1b6a9045459ff4a54dea11cbfe732b01e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/557918
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 2024-01-23 19:40:38 -08:00 • committed by Michael Pratt
parent 5c0d0929d3
commit e069587c8d
6 changed files with 451 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.