diff --git a/cc/afdo_test.go b/cc/afdo_test.go
index 5515464..fe3392a 100644
--- a/cc/afdo_test.go
+++ b/cc/afdo_test.go
@@ -15,28 +15,46 @@
 package cc
 
 import (
+	"strings"
 	"testing"
 
 	"android/soong/android"
+
 	"github.com/google/blueprint"
 )
 
+type visitDirectDepsInterface interface {
+	VisitDirectDeps(blueprint.Module, func(dep blueprint.Module))
+}
+
+func hasDirectDep(ctx visitDirectDepsInterface, m android.Module, wantDep android.Module) bool {
+	var found bool
+	ctx.VisitDirectDeps(m, func(dep blueprint.Module) {
+		if dep == wantDep {
+			found = true
+		}
+	})
+	return found
+}
+
 func TestAfdoDeps(t *testing.T) {
 	bp := `
-	cc_library {
+	cc_library_shared {
 		name: "libTest",
-		srcs: ["foo.c"],
+		srcs: ["test.c"],
 		static_libs: ["libFoo"],
 		afdo: true,
 	}
 
-	cc_library {
+	cc_library_static {
 		name: "libFoo",
+		srcs: ["foo.c"],
 		static_libs: ["libBar"],
 	}
 
-	cc_library {
+	cc_library_static {
 		name: "libBar",
+		srcs: ["bar.c"],
 	}
 	`
 	prepareForAfdoTest := android.FixtureAddTextFile("toolchain/pgo-profiles/sampling/libTest.afdo", "TEST")
@@ -46,25 +64,89 @@
 		prepareForAfdoTest,
 	).RunTestWithBp(t, bp)
 
-	libTest := result.ModuleForTests("libTest", "android_arm64_armv8-a_shared").Module()
-	libFoo := result.ModuleForTests("libFoo", "android_arm64_armv8-a_static_afdo-libTest").Module()
-	libBar := result.ModuleForTests("libBar", "android_arm64_armv8-a_static_afdo-libTest").Module()
+	libTest := result.ModuleForTests("libTest", "android_arm64_armv8-a_shared")
+	libFoo := result.ModuleForTests("libFoo", "android_arm64_armv8-a_static_afdo-libTest")
+	libBar := result.ModuleForTests("libBar", "android_arm64_armv8-a_static_afdo-libTest")
 
-	hasDep := func(m android.Module, wantDep android.Module) bool {
-		var found bool
-		result.VisitDirectDeps(m, func(dep blueprint.Module) {
-			if dep == wantDep {
-				found = true
-			}
-		})
-		return found
-	}
-
-	if !hasDep(libTest, libFoo) {
+	if !hasDirectDep(result, libTest.Module(), libFoo.Module()) {
 		t.Errorf("libTest missing dependency on afdo variant of libFoo")
 	}
 
-	if !hasDep(libFoo, libBar) {
+	if !hasDirectDep(result, libFoo.Module(), libBar.Module()) {
 		t.Errorf("libTest missing dependency on afdo variant of libBar")
 	}
+
+	cFlags := libTest.Rule("cc").Args["cFlags"]
+	if w := "-fprofile-sample-accurate"; !strings.Contains(cFlags, w) {
+		t.Errorf("Expected 'libTest' to enable afdo, but did not find %q in cflags %q", w, cFlags)
+	}
+
+	cFlags = libFoo.Rule("cc").Args["cFlags"]
+	if w := "-fprofile-sample-accurate"; !strings.Contains(cFlags, w) {
+		t.Errorf("Expected 'libFoo' to enable afdo, but did not find %q in cflags %q", w, cFlags)
+	}
+
+	cFlags = libBar.Rule("cc").Args["cFlags"]
+	if w := "-fprofile-sample-accurate"; !strings.Contains(cFlags, w) {
+		t.Errorf("Expected 'libBar' to enable afdo, but did not find %q in cflags %q", w, cFlags)
+	}
+}
+
+func TestAfdoEnabledOnStaticDepNoAfdo(t *testing.T) {
+	bp := `
+	cc_library_shared {
+		name: "libTest",
+		srcs: ["foo.c"],
+		static_libs: ["libFoo"],
+	}
+
+	cc_library_static {
+		name: "libFoo",
+		srcs: ["foo.c"],
+		static_libs: ["libBar"],
+		afdo: true, // TODO(b/256670524): remove support for enabling afdo from static only libraries, this can only propagate from shared libraries/binaries
+	}
+
+	cc_library_static {
+		name: "libBar",
+	}
+	`
+	prepareForAfdoTest := android.FixtureAddTextFile("toolchain/pgo-profiles/sampling/libFoo.afdo", "TEST")
+
+	result := android.GroupFixturePreparers(
+		prepareForCcTest,
+		prepareForAfdoTest,
+	).RunTestWithBp(t, bp)
+
+	libTest := result.ModuleForTests("libTest", "android_arm64_armv8-a_shared").Module()
+	libFoo := result.ModuleForTests("libFoo", "android_arm64_armv8-a_static")
+	libBar := result.ModuleForTests("libBar", "android_arm64_armv8-a_static").Module()
+
+	if !hasDirectDep(result, libTest, libFoo.Module()) {
+		t.Errorf("libTest missing dependency on afdo variant of libFoo")
+	}
+
+	if !hasDirectDep(result, libFoo.Module(), libBar) {
+		t.Errorf("libFoo missing dependency on afdo variant of libBar")
+	}
+
+	fooVariants := result.ModuleVariantsForTests("foo")
+	for _, v := range fooVariants {
+		if strings.Contains(v, "afdo-") {
+			t.Errorf("Expected no afdo variant of 'foo', got %q", v)
+		}
+	}
+
+	cFlags := libFoo.Rule("cc").Args["cFlags"]
+	if w := "-fprofile-sample-accurate"; strings.Contains(cFlags, w) {
+		t.Errorf("Expected 'foo' to not enable afdo, but found %q in cflags %q", w, cFlags)
+	}
+
+	barVariants := result.ModuleVariantsForTests("bar")
+	for _, v := range barVariants {
+		if strings.Contains(v, "afdo-") {
+			t.Errorf("Expected no afdo variant of 'bar', got %q", v)
+		}
+	}
+
 }
diff --git a/cc/lto_test.go b/cc/lto_test.go
index b52f2b6..afd2c77 100644
--- a/cc/lto_test.go
+++ b/cc/lto_test.go
@@ -24,29 +24,35 @@
 
 func TestThinLtoDeps(t *testing.T) {
 	bp := `
-	cc_library {
+	cc_library_shared {
 		name: "lto_enabled",
 		srcs: ["src.c"],
-		static_libs: ["foo"],
+		static_libs: ["foo", "lib_never_lto"],
 		shared_libs: ["bar"],
 		lto: {
 			thin: true,
 		}
 	}
-	cc_library {
+	cc_library_static {
 		name: "foo",
 		static_libs: ["baz"],
 	}
-	cc_library {
+	cc_library_shared {
 		name: "bar",
 		static_libs: ["qux"],
 	}
-	cc_library {
+	cc_library_static {
 		name: "baz",
 	}
-	cc_library {
+	cc_library_static {
 		name: "qux",
 	}
+	cc_library_static {
+		name: "lib_never_lto",
+		lto: {
+			never: true,
+		},
+	}
 `
 
 	result := android.GroupFixturePreparers(
@@ -54,8 +60,6 @@
 	).RunTestWithBp(t, bp)
 
 	libLto := result.ModuleForTests("lto_enabled", "android_arm64_armv8-a_shared").Module()
-	libFoo := result.ModuleForTests("foo", "android_arm64_armv8-a_static_lto-thin").Module()
-	libBaz := result.ModuleForTests("baz", "android_arm64_armv8-a_static_lto-thin").Module()
 
 	hasDep := func(m android.Module, wantDep android.Module) bool {
 		var found bool
@@ -67,12 +71,24 @@
 		return found
 	}
 
+	libFoo := result.ModuleForTests("foo", "android_arm64_armv8-a_static_lto-thin").Module()
 	if !hasDep(libLto, libFoo) {
 		t.Errorf("'lto_enabled' missing dependency on thin lto variant of 'foo'")
 	}
 
+	libBaz := result.ModuleForTests("baz", "android_arm64_armv8-a_static_lto-thin").Module()
 	if !hasDep(libFoo, libBaz) {
-		t.Errorf("'lto_enabled' missing dependency on thin lto variant of transitive dep 'baz'")
+		t.Errorf("'foo' missing dependency on thin lto variant of transitive dep 'baz'")
+	}
+
+	libNeverLto := result.ModuleForTests("lib_never_lto", "android_arm64_armv8-a_static_lto-thin").Module()
+	if !hasDep(libLto, libNeverLto) {
+		t.Errorf("'lto_enabled' missing dependency on NO-thin lto variant of 'lib_never_lto'")
+	}
+
+	libBar := result.ModuleForTests("bar", "android_arm64_armv8-a_shared").Module()
+	if !hasDep(libLto, libBar) {
+		t.Errorf("'lto_enabled' missing dependency on non-thin lto variant of 'bar'")
 	}
 
 	barVariants := result.ModuleVariantsForTests("bar")
@@ -88,3 +104,74 @@
 		}
 	}
 }
+
+func TestThinLtoOnlyOnStaticDep(t *testing.T) {
+	bp := `
+	cc_library_shared {
+		name: "root",
+		srcs: ["src.c"],
+		static_libs: ["foo"],
+	}
+	cc_library_shared {
+		name: "root_no_lto",
+		srcs: ["src.c"],
+		static_libs: ["foo"],
+		lto: {
+			never: true,
+		}
+	}
+	cc_library_static {
+		name: "foo",
+		srcs: ["foo.c"],
+		static_libs: ["baz"],
+		lto: {
+			thin: true,
+		}
+	}
+	cc_library_static {
+		name: "baz",
+		srcs: ["baz.c"],
+	}
+`
+
+	result := android.GroupFixturePreparers(
+		prepareForCcTest,
+	).RunTestWithBp(t, bp)
+
+	libRoot := result.ModuleForTests("root", "android_arm64_armv8-a_shared").Module()
+	libRootLtoNever := result.ModuleForTests("root_no_lto", "android_arm64_armv8-a_shared").Module()
+
+	hasDep := func(m android.Module, wantDep android.Module) bool {
+		var found bool
+		result.VisitDirectDeps(m, func(dep blueprint.Module) {
+			if dep == wantDep {
+				found = true
+			}
+		})
+		return found
+	}
+
+	libFoo := result.ModuleForTests("foo", "android_arm64_armv8-a_static")
+	if !hasDep(libRoot, libFoo.Module()) {
+		t.Errorf("'root' missing dependency on thin lto variant of 'foo'")
+	}
+
+	if !hasDep(libRootLtoNever, libFoo.Module()) {
+		t.Errorf("'root_no_lto' missing dependency on thin lto variant of 'foo'")
+	}
+
+	libFooCFlags := libFoo.Rule("cc").Args["cFlags"]
+	if w := "-flto=thin -fsplit-lto-unit"; !strings.Contains(libFooCFlags, w) {
+		t.Errorf("'foo' expected to have flags %q, but got %q", w, libFooCFlags)
+	}
+
+	libBaz := result.ModuleForTests("baz", "android_arm64_armv8-a_static_lto-thin")
+	if !hasDep(libFoo.Module(), libBaz.Module()) {
+		t.Errorf("'foo' missing dependency on thin lto variant of transitive dep 'baz'")
+	}
+
+	libBazCFlags := libFoo.Rule("cc").Args["cFlags"]
+	if w := "-flto=thin -fsplit-lto-unit"; !strings.Contains(libBazCFlags, w) {
+		t.Errorf("'baz' expected to have flags %q, but got %q", w, libFooCFlags)
+	}
+}