diff --git a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h
index 7129ed1ff370d597895b3f46b56b1250da7fa190..cdb664eb8f7db820b6b06b2667bfad6dc14cb7a2 100644
--- a/gcc/config/aarch64/aarch64.h
+++ b/gcc/config/aarch64/aarch64.h
@@ -292,7 +292,7 @@ enum class aarch64_feature : unsigned char {
 #define TARGET_RNG (AARCH64_ISA_RNG)
 
 /* Memory Tagging instructions optional to Armv8.5 enabled through +memtag.  */
-#define TARGET_MEMTAG (AARCH64_ISA_V8_5A && AARCH64_ISA_MEMTAG)
+#define TARGET_MEMTAG (AARCH64_ISA_MEMTAG)
 
 /* I8MM instructions are enabled through +i8mm.  */
 #define TARGET_I8MM (AARCH64_ISA_I8MM)
diff --git a/gcc/config/aarch64/arm_acle.h b/gcc/config/aarch64/arm_acle.h
index e0ac591d2c8d6c4c4c8a074b2d9881c47b1db1ab..87fb42f47c5821adecbb0ea441e0a38c63972e77 100644
--- a/gcc/config/aarch64/arm_acle.h
+++ b/gcc/config/aarch64/arm_acle.h
@@ -325,7 +325,7 @@ __rndrrs (uint64_t *__res)
 #pragma GCC pop_options
 
 #pragma GCC push_options
-#pragma GCC target ("arch=armv8.5-a+memtag")
+#pragma GCC target ("+nothing+memtag")
 
 #define __arm_mte_create_random_tag(__ptr, __u64_mask) \
   __builtin_aarch64_memtag_irg(__ptr, __u64_mask)
diff --git a/gcc/config/aarch64/arm_fp16.h b/gcc/config/aarch64/arm_fp16.h
index a8fa4dbbdfe1bab4aa604bb311ef66d4e1de18ac..84b2ed66f9ba19fba6ccd8be33940d7239bfa22e 100644
--- a/gcc/config/aarch64/arm_fp16.h
+++ b/gcc/config/aarch64/arm_fp16.h
@@ -30,7 +30,7 @@
 #include <stdint.h>
 
 #pragma GCC push_options
-#pragma GCC target ("arch=armv8.2-a+fp16")
+#pragma GCC target ("+nothing+fp16+nosimd")
 
 typedef __fp16 float16_t;
 
diff --git a/gcc/config/aarch64/arm_neon.h b/gcc/config/aarch64/arm_neon.h
index eeec9f162e223df8cf7803b3227aef22e94227ac..a078674376af121c36bbebef76631c25a6815b1b 100644
--- a/gcc/config/aarch64/arm_neon.h
+++ b/gcc/config/aarch64/arm_neon.h
@@ -25590,7 +25590,7 @@ __INTERLEAVE_LIST (zip)
 #include "arm_fp16.h"
 
 #pragma GCC push_options
-#pragma GCC target ("arch=armv8.2-a+fp16")
+#pragma GCC target ("+nothing+fp16")
 
 /* ARMv8.2-A FP16 one operand vector intrinsics.  */
 
@@ -26753,7 +26753,7 @@ vminnmvq_f16 (float16x8_t __a)
 /* AdvSIMD Dot Product intrinsics.  */
 
 #pragma GCC push_options
-#pragma GCC target ("arch=armv8.2-a+dotprod")
+#pragma GCC target ("+nothing+dotprod")
 
 __extension__ extern __inline uint32x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
@@ -26844,7 +26844,7 @@ vdotq_laneq_s32 (int32x4_t __r, int8x16_t __a, int8x16_t __b, const int __index)
 #pragma GCC pop_options
 
 #pragma GCC push_options
-#pragma GCC target ("arch=armv8.2-a+sm4")
+#pragma GCC target ("+nothing+sm4")
 
 __extension__ extern __inline uint32x4_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
@@ -26911,7 +26911,7 @@ vsm4ekeyq_u32 (uint32x4_t __a, uint32x4_t __b)
 #pragma GCC pop_options
 
 #pragma GCC push_options
-#pragma GCC target ("arch=armv8.2-a+sha3")
+#pragma GCC target ("+nothing+sha3")
 
 __extension__ extern __inline uint64x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
@@ -27547,7 +27547,7 @@ vcmlaq_rot270_laneq_f32 (float32x4_t __r, float32x4_t __a, float32x4_t __b,
 #pragma GCC pop_options
 
 #pragma GCC push_options
-#pragma GCC target ("arch=armv8.2-a+fp16fml")
+#pragma GCC target ("+nothing+fp16fml")
 
 __extension__ extern __inline float32x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
@@ -27856,7 +27856,7 @@ vrnd64xq_f64 (float64x2_t __a)
 #include "arm_bf16.h"
 
 #pragma GCC push_options
-#pragma GCC target ("arch=armv8.2-a+bf16")
+#pragma GCC target ("+nothing+bf16")
 
 __extension__ extern __inline bfloat16x4_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
@@ -28535,7 +28535,7 @@ vst4q_lane_bf16 (bfloat16_t *__ptr, bfloat16x8x4_t __val, const int __lane)
 /* AdvSIMD 8-bit Integer Matrix Multiply (I8MM) intrinsics.  */
 
 #pragma GCC push_options
-#pragma GCC target ("arch=armv8.2-a+i8mm")
+#pragma GCC target ("+nothing+i8mm")
 
 __extension__ extern __inline int32x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
diff --git a/gcc/testsuite/gcc.target/aarch64/feature-bf16-backport.c b/gcc/testsuite/gcc.target/aarch64/feature-bf16-backport.c
new file mode 100644
index 0000000000000000000000000000000000000000..3a03255bbb9a3e3da45c9f2ecafaf12685278057
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/feature-bf16-backport.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-march=armv8-a+bf16" } */
+
+#include <arm_neon.h>
+
+float32x4_t bar (float32x4_t r, bfloat16x8_t a, bfloat16x8_t b) {
+        return vbfmlalbq_f32 (r, a, b);
+}
+
+/* { dg-final { scan-assembler {\tbfmlalb\t} } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/feature-dotprod-backport.c b/gcc/testsuite/gcc.target/aarch64/feature-dotprod-backport.c
new file mode 100644
index 0000000000000000000000000000000000000000..5f66fffa5f5b09a9c04da7b861055e3aa89bccec
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/feature-dotprod-backport.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-march=armv8-a+dotprod" } */
+
+#include <arm_neon.h>
+
+uint32x4_t bar (uint32x4_t r, uint8x16_t a, uint8x16_t b) {
+        return vdotq_u32(r, a, b);
+}
+
+/* { dg-final { scan-assembler {\tudot\t} } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/feature-fp16-backport.c b/gcc/testsuite/gcc.target/aarch64/feature-fp16-backport.c
new file mode 100644
index 0000000000000000000000000000000000000000..eb94ae060664eef4275023440c0a18b52ae27b42
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/feature-fp16-backport.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-march=armv8-a+fp16" } */
+
+#include <arm_neon.h>
+
+float16x8_t bar (float16x8_t a, float16x8_t b) {
+        return vaddq_f16(a, b);
+}
+
+/* { dg-final { scan-assembler {\tfadd\t} } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/feature-fp16-scalar-backport.c b/gcc/testsuite/gcc.target/aarch64/feature-fp16-scalar-backport.c
new file mode 100644
index 0000000000000000000000000000000000000000..9cde6b5558c2e3699620d0d35ebc3e679fdfe5eb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/feature-fp16-scalar-backport.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-march=armv8-a+fp16+nosimd" } */
+
+#include <arm_fp16.h>
+
+float16_t bar (float16_t a, float16_t b) {
+        return vaddh_f16(a, b);
+}
+
+/* { dg-final { scan-assembler {\tfadd\t} } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/feature-fp16fml-backport.c b/gcc/testsuite/gcc.target/aarch64/feature-fp16fml-backport.c
new file mode 100644
index 0000000000000000000000000000000000000000..86c4748b86d9730d433cc206700d7789d996bb6d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/feature-fp16fml-backport.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-march=armv8-a+fp16fml" } */
+
+#include <arm_neon.h>
+
+float32x4_t bar (float32x4_t r, float16x8_t a, float16x8_t b) {
+        return vfmlalq_high_f16 (r, a, b);
+}
+
+/* { dg-final { scan-assembler {\tfmlal2\t} } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/feature-i8mm-backport.c b/gcc/testsuite/gcc.target/aarch64/feature-i8mm-backport.c
new file mode 100644
index 0000000000000000000000000000000000000000..6dd0214faab9d470a4f363252d48ac0de92bfe7b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/feature-i8mm-backport.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-march=armv8-a+i8mm" } */
+
+#include <arm_neon.h>
+
+int32x4_t bar (int32x4_t r, int8x16_t a, int8x16_t b) {
+        return vmmlaq_s32 (r, a, b);
+}
+
+/* { dg-final { scan-assembler {\tsmmla\t} } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/feature-memtag-backport.c b/gcc/testsuite/gcc.target/aarch64/feature-memtag-backport.c
new file mode 100644
index 0000000000000000000000000000000000000000..5cb071b77ccbd11039d4b8ee9e2cd78a708f2fad
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/feature-memtag-backport.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-march=armv8-a+memtag" } */
+
+#include <arm_acle.h>
+
+int *bar (int *src) {
+        return __arm_mte_create_random_tag(src, 2<<16-1);
+}
+
+/* { dg-final { scan-assembler {\tirg\t} } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/feature-sha3-backport.c b/gcc/testsuite/gcc.target/aarch64/feature-sha3-backport.c
new file mode 100644
index 0000000000000000000000000000000000000000..e194f1a10ea12439195c8cf1aae08dae26607c14
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/feature-sha3-backport.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-march=armv8-a+sha3" } */
+
+#include <arm_neon.h>
+
+uint64x2_t bar (uint64x2_t a, uint64x2_t b, uint64x2_t c) {
+        return vsha512hq_u64(a, b, c);
+}
+
+/* { dg-final { scan-assembler {\tsha512h\t} } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/feature-sm4-backport.c b/gcc/testsuite/gcc.target/aarch64/feature-sm4-backport.c
new file mode 100644
index 0000000000000000000000000000000000000000..604a58bcb68e5753d2eec661a374b4983ad29088
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/feature-sm4-backport.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-march=armv8-a+sm4" } */
+
+#include <arm_neon.h>
+
+uint32x4_t bar (uint32x4_t a, uint32x4_t b, uint32x4_t c) {
+        return vsm3tt1aq_u32(a, b, c, 2);
+}
+
+/* { dg-final { scan-assembler {\tsm3tt1a\t} } } */
