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Merge "Support LLD ThinLTO cache/threshold option"

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This commit is contained in:
Yi Kong
2019-03-26 00:02:36 +00:00
committed by Gerrit Code Review
parent fc22e4eeba 630b960fb5
commit ff58c0e248
1 changed files with 4 additions and 4 deletions
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8
cc/lto.go
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@@ -91,22 +91,22 @@ func (lto *lto) flags(ctx BaseModuleContext, flags Flags) Flags {
flags.CFlags = append(flags.CFlags, ltoFlag)
flags.LdFlags = append(flags.LdFlags, ltoFlag)
if ctx.Config().IsEnvTrue("USE_THINLTO_CACHE") && Bool(lto.Properties.Lto.Thin) && !lto.useClangLld(ctx) {
if ctx.Config().IsEnvTrue("USE_THINLTO_CACHE") && Bool(lto.Properties.Lto.Thin) && lto.useClangLld(ctx) {
// Set appropriate ThinLTO cache policy
cacheDirFormat := "-Wl,-plugin-opt,cache-dir="
cacheDirFormat := "-Wl,--thinlto-cache-dir="
cacheDir := android.PathForOutput(ctx, "thinlto-cache").String()
flags.LdFlags = append(flags.LdFlags, cacheDirFormat+cacheDir)
// Limit the size of the ThinLTO cache to the lesser of 10% of available
// disk space and 10GB.
cachePolicyFormat := "-Wl,-plugin-opt,cache-policy="
cachePolicyFormat := "-Wl,--thinlto-cache-policy="
policy := "cache_size=10%:cache_size_bytes=10g"
flags.LdFlags = append(flags.LdFlags, cachePolicyFormat+policy)
}
// If the module does not have a profile, be conservative and do not inline
// or unroll loops during LTO, in order to prevent significant size bloat.
if !ctx.isPgoCompile() && !lto.useClangLld(ctx) {
if !ctx.isPgoCompile() {
flags.LdFlags = append(flags.LdFlags, "-Wl,-plugin-opt,-inline-threshold=0")
flags.LdFlags = append(flags.LdFlags, "-Wl,-plugin-opt,-unroll-threshold=0")
}