diff --git a/core/box/tiny_front_config_box.h b/core/box/tiny_front_config_box.h
index 1950ae17..cbb665e2 100644
--- a/core/box/tiny_front_config_box.h
+++ b/core/box/tiny_front_config_box.h
@@ -90,7 +90,7 @@ static inline int tiny_fastcache_enabled(void) {
     return g_fastcache_enable;
 }
 
-static inline int sfc_cascade_enabled(void) {
+static inline int tiny_sfc_enabled(void) {
     extern int g_sfc_enabled;
     return g_sfc_enabled;
 }
@@ -104,7 +104,7 @@ static inline int tiny_tls_sll_enabled(void) {
 // These expand to actual function calls in normal mode
 #define TINY_FRONT_ULTRA_SLIM_ENABLED    ultra_slim_mode_enabled()
 #define TINY_FRONT_HEAP_V2_ENABLED       tiny_heap_v2_enabled()
-#define TINY_FRONT_SFC_ENABLED           sfc_cascade_enabled()
+#define TINY_FRONT_SFC_ENABLED           tiny_sfc_enabled()
 #define TINY_FRONT_FASTCACHE_ENABLED     tiny_fastcache_enabled()
 #define TINY_FRONT_TLS_SLL_ENABLED       tiny_tls_sll_enabled()
 #define TINY_FRONT_UNIFIED_GATE_ENABLED  front_gate_unified_enabled()
diff --git a/core/hakmem_tiny_free.inc b/core/hakmem_tiny_free.inc
index b1cc9e81..db9c9359 100644
--- a/core/hakmem_tiny_free.inc
+++ b/core/hakmem_tiny_free.inc
@@ -229,7 +229,8 @@ void hak_tiny_free_with_slab(void* ptr, TinySlab* slab) {
         }
 
         // Front-V2: try to return to TLS magazine first (A/B, default OFF)
-        if (__builtin_expect(tiny_heap_v2_enabled() && class_idx <= 3, 0)) {
+        // Phase 7-Step8: Use config macro for dead code elimination in PGO mode
+        if (__builtin_expect(TINY_FRONT_HEAP_V2_ENABLED && class_idx <= 3, 0)) {
             void* base = (void*)((uint8_t*)ptr - 1);
             if (tiny_heap_v2_try_push(class_idx, base)) {
                 tiny_debug_ring_record(TINY_RING_EVENT_FREE_FAST, (uint16_t)class_idx, ptr, slab_idx);
diff --git a/core/tiny_alloc_fast.inc.h b/core/tiny_alloc_fast.inc.h
index 1200addc..6f461573 100644
--- a/core/tiny_alloc_fast.inc.h
+++ b/core/tiny_alloc_fast.inc.h
@@ -270,7 +270,8 @@ static inline void* tiny_heap_v2_alloc_by_class(int class_idx) {
     // FIX: Ensure TLS is initialized before first magazine access
     tiny_heap_v2_ensure_init();
     if (class_idx < 0 || class_idx > 3) return NULL;
-    if (!tiny_heap_v2_enabled()) return NULL;
+    // Phase 7-Step8: Use config macro for dead code elimination in PGO mode
+    if (!TINY_FRONT_HEAP_V2_ENABLED) return NULL;
     if (!tiny_heap_v2_class_enabled(class_idx)) return NULL;
 
     TinyHeapV2Mag* mag = &g_tiny_heap_v2_mag[class_idx];
@@ -424,11 +425,11 @@ static inline void* tiny_alloc_fast_pop(int class_idx) {
     }
 
     // Box 5-NEW: Layer 0 - Try SFC first (if enabled)
-    // Cache g_sfc_enabled in TLS to avoid global load on every allocation
+    // Phase 7-Step8: Use config macro for dead code elimination in PGO mode
     static __thread int sfc_check_done = 0;
     static __thread int sfc_is_enabled = 0;
     if (__builtin_expect(!sfc_check_done, 0)) {
-        sfc_is_enabled = g_sfc_enabled;
+        sfc_is_enabled = TINY_FRONT_SFC_ENABLED;
         sfc_check_done = 1;
     }
 
@@ -674,7 +675,8 @@ static inline int tiny_alloc_fast_refill(int class_idx) {
     }
 
     // Only cascade if explicitly enabled AND we have refilled blocks in SLL
-    if (sfc_cascade_enabled && g_sfc_enabled && refilled > 0) {
+    // Phase 7-Step8: Use config macro for dead code elimination in PGO mode
+    if (sfc_cascade_enabled && TINY_FRONT_SFC_ENABLED && refilled > 0) {
         // Transfer half of refilled blocks to SFC (keep half in SLL for future)
         int sfc_target = refilled / 2;
         if (sfc_target > 0) {
@@ -734,7 +736,8 @@ static inline void* tiny_alloc_fast(size_t size) {
 #if !HAKMEM_BUILD_RELEASE
     static __thread int debug_checked = 0;
     if (!debug_checked) {
-        int enabled = ultra_slim_mode_enabled();
+        // Phase 7-Step8: Use config macro for dead code elimination in PGO mode
+        int enabled = TINY_FRONT_ULTRA_SLIM_ENABLED;
         if (enabled) {
             fprintf(stderr, "[TINY_ALLOC_FAST] Ultra SLIM gate: ENABLED (will use 4-layer path)\n");
         } else {