Merge "Enable --salvage-stale-profile for AutoFDO" into main
diff --git a/cc/afdo.go b/cc/afdo.go
index 8d8341e..1233e33 100644
--- a/cc/afdo.go
+++ b/cc/afdo.go
@@ -105,6 +105,9 @@
// The flags are prepended to allow overriding.
profileUseFlag := fmt.Sprintf(afdoFlagsFormat, fdoProfilePath)
flags.Local.CFlags = append([]string{profileUseFlag}, flags.Local.CFlags...)
+ // Salvage stale profile by fuzzy matching and use the remapped location for sample profile query.
+ flags.Local.CFlags = append([]string{"-mllvm", "--salvage-stale-profile=true"}, flags.Local.CFlags...)
+ flags.Local.CFlags = append([]string{"-mllvm", "--salvage-stale-profile-max-callsites=2000"}, flags.Local.CFlags...)
flags.Local.LdFlags = append([]string{profileUseFlag, "-Wl,-mllvm,-no-warn-sample-unused=true"}, flags.Local.LdFlags...)
// Update CFlagsDeps and LdFlagsDeps so the module is rebuilt