re PR target/82641 (Unable to enable crc32 for a certain function with target…

re PR target/82641 (Unable to enable crc32 for a certain function with target attribute on ARM (aarch32))

2018-02-09  Tamar Christina  <tamar.christina@arm.com>

	PR target/82641
	* config/arm/arm-c.c (arm_cpu_builtins): Un-define __ARM_FEATURE_LDREX,
	__ARM_ARCH_PROFILE, __ARM_ARCH_ISA_THUMB, __ARM_FP and __ARM_NEON_FP.

gcc/testsuite
2018-02-09  Tamar Christina  <tamar.christina@arm.com>

	PR target/82641
	* gcc.target/arm/pragma_arch_switch_2.c: Use armv6 and armv5t.

From-SVN: r257524

gcc/ChangeLog

+2018-02-09  Tamar Christina  <tamar.christina@arm.com>
+
+	PR target/82641
+	* config/arm/arm-c.c (arm_cpu_builtins): Un-define __ARM_FEATURE_LDREX,
+	__ARM_ARCH_PROFILE, __ARM_ARCH_ISA_THUMB, __ARM_FP and __ARM_NEON_FP.
+
 2018-02-09  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
 
 	PR target/PR84295

gcc/config/arm/arm-c.c

@@ -87,11 +87,10 @@ arm_cpu_builtins (struct cpp_reader* pfile)
 	builtin_define ("__ARM_FEATURE_CMSE");
     }
 
+  cpp_undef (pfile, "__ARM_FEATURE_LDREX");
   if (TARGET_ARM_FEATURE_LDREX)
     builtin_define_with_int_value ("__ARM_FEATURE_LDREX",
 				   TARGET_ARM_FEATURE_LDREX);
-  else
-    cpp_undef (pfile, "__ARM_FEATURE_LDREX");
 
   def_or_undef_macro (pfile, "__ARM_FEATURE_CLZ",
 		      ((TARGET_ARM_ARCH >= 5 && !TARGET_THUMB)
@@ -105,6 +104,8 @@ arm_cpu_builtins (struct cpp_reader* pfile)
   builtin_define_with_int_value ("__ARM_SIZEOF_MINIMAL_ENUM",
 				 flag_short_enums ? 1 : 4);
   builtin_define_type_sizeof ("__ARM_SIZEOF_WCHAR_T", wchar_type_node);
+
+  cpp_undef (pfile, "__ARM_ARCH_PROFILE");
   if (TARGET_ARM_ARCH_PROFILE)
     builtin_define_with_int_value ("__ARM_ARCH_PROFILE",
 				   TARGET_ARM_ARCH_PROFILE);
@@ -128,6 +129,7 @@ arm_cpu_builtins (struct cpp_reader* pfile)
   else
     def_or_undef_macro (pfile, "__THUMBEL__", TARGET_THUMB);
 
+  cpp_undef (pfile, "__ARM_ARCH_ISA_THUMB");
   if (TARGET_ARM_ARCH_ISA_THUMB)
     builtin_define_with_int_value ("__ARM_ARCH_ISA_THUMB",
 				   TARGET_ARM_ARCH_ISA_THUMB);
@@ -147,10 +149,9 @@ arm_cpu_builtins (struct cpp_reader* pfile)
 
   builtin_define ("__VFP_FP__");
 
+  cpp_undef (pfile, "__ARM_FP");
   if (TARGET_ARM_FP)
     builtin_define_with_int_value ("__ARM_FP", TARGET_ARM_FP);
-  else
-    cpp_undef (pfile, "__ARM_FP");
 
   def_or_undef_macro (pfile, "__ARM_FP16_FORMAT_IEEE",
 		      arm_fp16_format == ARM_FP16_FORMAT_IEEE);
@@ -169,10 +170,9 @@ arm_cpu_builtins (struct cpp_reader* pfile)
   def_or_undef_macro (pfile, "__ARM_NEON__", TARGET_NEON);
   def_or_undef_macro (pfile, "__ARM_NEON", TARGET_NEON);
 
+  cpp_undef (pfile, "__ARM_NEON_FP");
   if (TARGET_NEON_FP)
     builtin_define_with_int_value ("__ARM_NEON_FP", TARGET_NEON_FP);
-  else
-    cpp_undef (pfile, "__ARM_NEON_FP");
 
   /* Add a define for interworking. Needed when building libgcc.a.  */
   if (arm_cpp_interwork)

gcc/testsuite/ChangeLog

+2018-02-09  Tamar Christina  <tamar.christina@arm.com>
+
+	PR target/82641
+	* gcc.target/arm/pragma_arch_switch_2.c: Use armv6 and armv5t.
+
 2018-02-09  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
 
 	PR target/PR84295

gcc/testsuite/gcc.target/arm/pragma_arch_switch_2.c

@@ -2,16 +2,16 @@
 /* { dg-skip-if "instruction not valid on thumb" { *-*-* } { "-mthumb" } { "" } } */
 /* { dg-do assemble } */
 /* { dg-require-effective-target arm_arm_ok } */
-/* { dg-additional-options "-Wall -O2 -march=armv4t -std=gnu99 -marm" } */
+/* { dg-additional-options "-Wall -O2 -march=armv5t -std=gnu99 -marm" } */
 
-#pragma GCC target ("arch=armv5te")
-void cpu_has_iwmmxt (void)
+#pragma GCC target ("arch=armv6")
+int test_assembly (int hi, int lo)
 {
-   int lo;
-   int hi;
+   int res;
    __asm__ __volatile__ (
-      "mcrr   p0, 0, %2, %3, c0\n"
-      : "=r" (lo), "=r" (hi)
-      : "r" (0), "r" (0x100));
+      "uxtah   %0, %1, %2\n"
+      : "=r" (res)
+      : "r" (hi),  "r" (lo));
+   return res;
 }