Merge "Support LLD ThinLTO cache/threshold option"

		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")

		}