aarch64: Conditionally define __ARM_FEATURE_SVE2p1

Previous patches are supposed to add full support for SVE2.1,
so this patch advertises that through __ARM_FEATURE_SVE2p1.

pragma_cpp_predefs_3.c had one fewer pop than push.  The final
test is triple-nested:

- armv8-a (to start with a clean slate, untainted by command-line flags)
- the maximal SVE set
- general-regs-only

gcc/
	* config/aarch64/aarch64-c.cc (aarch64_update_cpp_builtins): Handle
	__ARM_FEATURE_SVE2p1.

gcc/testsuite/
	* gcc.target/aarch64/pragma_cpp_predefs_3.c: Add SVE2p1 tests.

2 files changed, 85 insertions, 0 deletions

diff --git a/gcc/config/aarch64/aarch64-c.cc b/gcc/config/aarch64/aarch64-c.cc
index f9b9e37..d1ae80c 100644
--- a/gcc/config/aarch64/aarch64-c.cc
+++ b/gcc/config/aarch64/aarch64-c.cc
@@ -214,6 +214,7 @@ aarch64_update_cpp_builtins (cpp_reader *pfile)
 			"__ARM_FEATURE_SVE2_BITPERM", pfile);
   aarch64_def_or_undef (TARGET_SVE2_SHA3, "__ARM_FEATURE_SVE2_SHA3", pfile);
   aarch64_def_or_undef (TARGET_SVE2_SM4, "__ARM_FEATURE_SVE2_SM4", pfile);
+  aarch64_def_or_undef (TARGET_SVE2p1, "__ARM_FEATURE_SVE2p1", pfile);
 
   aarch64_def_or_undef (TARGET_LSE, "__ARM_FEATURE_ATOMICS", pfile);
   aarch64_def_or_undef (TARGET_AES, "__ARM_FEATURE_AES", pfile);
diff --git a/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_3.c b/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_3.c
index 3912852..f1f70ed 100644
--- a/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_3.c
+++ b/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_3.c
@@ -28,6 +28,10 @@
 #error "__ARM_FEATURE_SVE2_SM4 is defined but should not be!"
 #endif
 
+#ifdef __ARM_FEATURE_SVE2p1
+#error "__ARM_FEATURE_SVE2p1 is defined but should not be!"
+#endif
+
 #pragma GCC push_options
 #pragma GCC target ("arch=armv8.2-a+sve")
 
@@ -55,6 +59,10 @@
 #error "__ARM_FEATURE_SVE2_SM4 is defined but should not be!"
 #endif
 
+#ifdef __ARM_FEATURE_SVE2p1
+#error "__ARM_FEATURE_SVE2p1 is defined but should not be!"
+#endif
+
 #pragma GCC pop_options
 
 #pragma GCC push_options
@@ -84,6 +92,10 @@
 #error "__ARM_FEATURE_SVE2_SM4 is defined but should not be!"
 #endif
 
+#ifdef __ARM_FEATURE_SVE2p1
+#error "__ARM_FEATURE_SVE2p1 is defined but should not be!"
+#endif
+
 #pragma GCC pop_options
 
 #pragma GCC push_options
@@ -242,6 +254,72 @@
 #error "__ARM_FEATURE_SVE2_SM4 is not defined but should be!"
 #endif
 
+#pragma GCC pop_options
+
+#pragma GCC push_options
+#pragma GCC target ("arch=armv9-a+sve2p1")
+
+#ifndef __ARM_FEATURE_SVE
+#error "__ARM_FEATURE_SVE is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2
+#error "__ARM_FEATURE_SVE2 is not defined but should be!"
+#endif
+
+#ifdef __ARM_FEATURE_SVE2_AES
+#error "__ARM_FEATURE_SVE2_AES is defined but should not be!"
+#endif
+
+#ifdef __ARM_FEATURE_SVE2_BITPERM
+#error "__ARM_FEATURE_SVE2_BITPERM is defined but should not be!"
+#endif
+
+#ifdef __ARM_FEATURE_SVE2_SHA3
+#error "__ARM_FEATURE_SVE2_SHA3 is defined but should not be!"
+#endif
+
+#ifdef __ARM_FEATURE_SVE2_SM4
+#error "__ARM_FEATURE_SVE2_SM4 is defined but should not be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2p1
+#error "__ARM_FEATURE_SVE2p1 is not defined but should be!"
+#endif
+
+#pragma GCC pop_options
+
+#pragma GCC push_options
+#pragma GCC target ("arch=armv9-a+sve2-aes+sve2-bitperm+sve2-sha3+sve2-sm4+sve2p1")
+
+#ifndef __ARM_FEATURE_SVE
+#error "__ARM_FEATURE_SVE is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2
+#error "__ARM_FEATURE_SVE2 is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2_AES
+#error "__ARM_FEATURE_SVE2_AES is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2_BITPERM
+#error "__ARM_FEATURE_SVE2_BITPERM is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2_SHA3
+#error "__ARM_FEATURE_SVE2_SHA3 is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2_SM4
+#error "__ARM_FEATURE_SVE2_SM4 is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2p1
+#error "__ARM_FEATURE_SVE2p1 is not defined but should be!"
+#endif
+
 #pragma GCC push_options
 #pragma GCC target ("general-regs-only")
 
@@ -269,6 +347,12 @@
 #error "__ARM_FEATURE_SVE2_SM4 is defined but should not be!"
 #endif
 
+#ifdef __ARM_FEATURE_SVE2p1
+#error "__ARM_FEATURE_SVE2p1 is defined but should not be!"
+#endif
+
+#pragma GCC pop_options
+
 #pragma GCC pop_options
 
 #pragma GCC pop_options