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Commit 55019c43 authored by Yi Kong's avatar Yi Kong Committed by Gerrit Code Review
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Revert "Enable full LTO optimization by default" 

Revert submission 2988057-default-full-lto

Reason for revert: broken test

Reverted changes: /q/submissionid:2988057-default-full-lto
Bug: 330811070

Change-Id: I46487ad92d25741347c7f30e944a5794941d5d69
parent ce23b9ba

cc/lto.go

+6 −5
Original line number Diff line number Diff line
@@ -54,9 +54,6 @@ type LTOProperties struct { 


	// Use -fwhole-program-vtables cflag.

	Whole_program_vtables *bool



	// Use --lto-O0 flag.

	Lto_O0 *bool

}



type lto struct {
@@ -113,8 +110,12 @@ func (lto *lto) flags(ctx ModuleContext, flags Flags) Flags { 
		ltoCFlags := []string{"-flto=thin", "-fsplit-lto-unit"}

		var ltoLdFlags []string



		// Do not perform costly LTO optimizations for Eng builds.

		if Bool(lto.Properties.Lto_O0) || ctx.Config().Eng() {

		// The module did not explicitly turn on LTO. Only leverage LTO's

		// better dead code elimination and CFG simplification, but do

		// not perform costly optimizations for a balance between compile

		// time, binary size and performance.

		// Apply the same for Eng builds as well.

		if !lto.ThinLTO() || ctx.Config().Eng() {

			ltoLdFlags = append(ltoLdFlags, "-Wl,--lto-O0")

		}