diff --git a/cc/config/clang.go b/cc/config/clang.go
index 5cf24219e..b58223f09 100644
--- a/cc/config/clang.go
+++ b/cc/config/clang.go
@@ -92,12 +92,7 @@ var ClangUnknownLldflags = sorted([]string{
 	"-Wl,-m,aarch64_elf64_le_vec",
 })
 
-var ClangLibToolingUnknownCflags = []string{
-	// Remove -flto and other flto dependent flags.
-	"-flto*",
-	"-fsanitize*",
-	"-fwhole-program-vtables",
-}
+var ClangLibToolingUnknownCflags []string = nil
 
 func init() {
 	pctx.StaticVariable("ClangExtraCflags", strings.Join([]string{
diff --git a/cc/sabi.go b/cc/sabi.go
index 72a3c5c55..4a8649945 100644
--- a/cc/sabi.go
+++ b/cc/sabi.go
@@ -73,17 +73,6 @@ func (sabimod *sabi) flags(ctx ModuleContext, flags Flags) Flags {
 	flags.ToolingCFlags = filterOutWithPrefix(flags.CFlags, config.ClangLibToolingUnknownCflags)
 	flags.ToolingCppFlags = filterOutWithPrefix(flags.CppFlags, config.ClangLibToolingUnknownCflags)
 
-	// RSClang does not support recent mcpu option likes exynos-m2.
-	// So we need overriding mcpu option when we want to use it.
-	mappedArch := map[string]string{
-		"exynos-m2":  "cortex-a53",
-		"cortex-a55": "cortex-a53",
-		"cortex-a75": "cortex-a57",
-	}
-	if arch, ok := mappedArch[ctx.Arch().CpuVariant]; ok {
-		flags.ToolingCFlags = append(flags.ToolingCFlags, "-mcpu="+arch)
-	}
-
 	return flags
 }