testsuite: Add check for overflowed IMEM region to testsuite

gcc/testsuite/ChangeLog:

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.

From-SVN: r272206

gcc/testsuite/ChangeLog

 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.
+
+2019-06-12  Dimitar Dimitrov  <dimitar@dinux.eu>
+
 	* gcc.target/pru/abi-arg-struct.c: New test.
 	* gcc.target/pru/ashiftrt.c: New test.
 	* gcc.target/pru/builtins-1.c: New test.

gcc/testsuite/lib/target-supports.exp

@@ -8765,6 +8765,11 @@ proc check_effective_target_tiny {} {
 	    && [check_effective_target_avr_tiny] } {
 	   return 1
       }
+      # PRU Program Counter is 16-bits, and trampolines are not supported.
+      # Hence directly declare as a tiny target.
+      if [istarget pru-*-*] {
+	   return 1
+      }
       return 0
     }]
 }

gcc/testsuite/lib/target-utils.exp

@@ -35,6 +35,10 @@ proc ${tool}_check_unsupported_p { output } {
           && [check_effective_target_tiny] } {
         return "memory full"
      }
+    if { [regexp "(^|\n)\[^\n\]*: region \[^\n\]* overflowed" $output]
+          && [check_effective_target_tiny] } {
+	return "memory full"
+    }
 
     if { [istarget spu-*-*] && \
 	     [string match "*exceeds local store*" $output] } {