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Commit 630b960f authored by Yi Kong's avatar Yi Kong
Browse files

Support LLD ThinLTO cache/threshold option 

LLD has different option syntax for specifying ThinLTO cache. Change it
to LLD syntax and drop the support for GOLD, since there aren't many
projects that are linked with it.

Test: USE_THINLTO_CACHE=true m
Change-Id: I5c6c5281a05793414a6387d52ae48d9b43822ee9
parent e9665723

cc/lto.go

+4 −4
Original line number Diff line number Diff line
@@ -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")

		}