Merge "Do not perform AFDO or optimizing LTO for eng builds" into main

cc/afdo.go

@@ -64,6 +64,13 @@ func (afdo *afdo) props() []interface{} {
 	return []interface{}{&afdo.Properties}
 }
 
+func (afdo *afdo) begin(ctx BaseModuleContext) {
+	// Disable on eng builds for faster build.
+	if ctx.Config().Eng() {
+		afdo.Properties.Afdo = false
+	}
+}
+
 // afdoEnabled returns true for binaries and shared libraries
 // that set afdo prop to True and there is a profile available
 func (afdo *afdo) afdoEnabled() bool {

cc/cc.go

@@ -2401,6 +2401,9 @@ func (c *Module) begin(ctx BaseModuleContext) {
 	if c.coverage != nil {
 		c.coverage.begin(ctx)
 	}
+	if c.afdo != nil {
+		c.afdo.begin(ctx)
+	}
 	if c.lto != nil {
 		c.lto.begin(ctx)
 	}

cc/lto.go

@@ -116,7 +116,8 @@ func (lto *lto) flags(ctx BaseModuleContext, flags Flags) Flags {
 		// better dead code elimination and CFG simplification, but do
 		// not perform costly optimizations for a balance between compile
 		// time, binary size and performance.
-		if !lto.ThinLTO() {
+		// Apply the same for Eng builds as well.
+		if !lto.ThinLTO() || ctx.Config().Eng() {
 			ltoLdFlags = append(ltoLdFlags, "-Wl,--lto-O0")
 		}