diff --git a/core/tiny_alloc_fast.inc.h b/core/tiny_alloc_fast.inc.h
index 92e590cc..2f9f09a6 100644
--- a/core/tiny_alloc_fast.inc.h
+++ b/core/tiny_alloc_fast.inc.h
@@ -22,10 +22,23 @@
 #include "tiny_adaptive_sizing.h"      // Phase 2b: Adaptive sizing
 #include "box/tls_sll_box.h"           // Box TLS-SLL: C7-safe push/pop/splice
 #include "box/tiny_next_ptr_box.h"     // Box API: Next pointer read/write
+#include "box/tiny_front_config_box.h" // Phase 7-Step3: Compile-time config for dead code elimination
 #ifdef HAKMEM_TINY_FRONT_GATE_BOX
 #include "box/front_gate_box.h"
 #endif
 #include "hakmem_tiny_integrity.h"     // PRIORITY 1-4: Corruption detection
+
+// Phase 7-Step3: Config wrapper functions (for normal mode, eliminated in PGO mode)
+// These functions wrap global enable flags for dead code elimination in PGO builds
+static inline int tiny_fastcache_enabled(void) {
+    extern int g_fastcache_enable;
+    return g_fastcache_enable;
+}
+
+static inline int sfc_cascade_enabled(void) {
+    extern int g_sfc_enabled;
+    return g_sfc_enabled;
+}
 #ifdef HAKMEM_TINY_HEADER_CLASSIDX
 // Ring Cache and Unified Cache removed (A/B test: OFF is faster)
 #endif