testsuite: Add check for unsupported TI ABI PRU features to testsuite

gcc/testsuite/ChangeLog:

2019-06-12  Dimitar Dimitrov  <dimitar@dinux.eu>

	* lib/gcc-dg.exp: Filter unsupported features in PRU's TI ABI mode.
	* lib/target-utils.exp: Ditto.
	* lib/target-supports.exp (check_effective_target_function_pointers,
	check_effective_target_large_return_values): New.

From-SVN: r272207

gcc/testsuite/ChangeLog

 2019-06-12  Dimitar Dimitrov  <dimitar@dinux.eu>
 
+	* lib/gcc-dg.exp: Filter unsupported features in PRU's TI ABI mode.
+	* lib/target-utils.exp: Ditto.
+	* lib/target-supports.exp (check_effective_target_function_pointers,
+	check_effective_target_large_return_values): New.
+
+2019-06-12  Dimitar Dimitrov  <dimitar@dinux.eu>
+
 	* lib/gcc-dg.exp: Bail on region overflow for tiny targets.
 	* lib/target-utils.exp: Ditto.
 	* lib/target-supports.exp: Declare PRU target as tiny.

gcc/testsuite/lib/gcc-dg.exp

@@ -422,6 +422,17 @@ proc gcc-dg-prune { system text } {
 	return "::unsupported::memory full"
     }
 
+    if { [string match "*error: function pointers not supported*" $text]
+	  && ![check_effective_target_function_pointers] } {
+	# The format here is important.  See dg.exp.
+	return "::unsupported::funcptr"
+    }
+    if { [string match "*error: large return values not supported*" $text]
+    	  && ![check_effective_target_large_return_values] } {
+	# The format here is important.  See dg.exp.
+	return "::unsupported::large return values"
+    }
+
     return $text
 }
 

gcc/testsuite/lib/target-supports.exp

@@ -2644,6 +2644,32 @@ proc check_effective_target_size20plus { } {
     }]
 }
 
+# Return 1 if target supports function pointers, 0 otherwise.
+
+proc check_effective_target_function_pointers { } {
+    if { [istarget pru-*-*] } {
+	return [check_no_compiler_messages func_ptr_avail assembly {
+	    #ifdef __PRU_EABI_GNU__
+	    #error unsupported
+	    #endif
+	}]
+    }
+    return 1
+}
+
+# Return 1 if target supports arbitrarily large return values, 0 otherwise.
+
+proc check_effective_target_large_return_values { } {
+    if { [istarget pru-*-*] } {
+	return [check_no_compiler_messages large_return_values assembly {
+	    #ifdef __PRU_EABI_GNU__
+	    #error unsupported
+	    #endif
+	}]
+    }
+    return 1
+}
+
 # Return 1 if we support 24-bit or larger array and structure sizes
 # using default options, 0 otherwise.
 # This implies at least a 32-bit address space, as no targets have an address

gcc/testsuite/lib/target-utils.exp

@@ -44,5 +44,13 @@ proc ${tool}_check_unsupported_p { output } {
 	     [string match "*exceeds local store*" $output] } {
 	return "memory full"
     }
+    if { [string match "*error: function pointers not supported*" $output]
+	  && ![check_effective_target_function_pointers] } {
+	return "function pointers not supported"
+    }
+    if { [string match "*error: large return values not supported*" $output]
+	  && ![check_effective_target_large_return_values] } {
+	return "large return values not supported"
+    }
     return ""
 }