re PR lto/43373 (-fwhopr -fuse-linker-plugin ICE compressed stream data error)

2010-07-22  Richard Guenther  <rguenther@suse.de>

	* lib/target-supports-dg.exp (dg-require-linker-plugin): New proc.
	* lib/target-supports.exp (check_linker_plugin_available): Likewise.

	PR lto/43373
	* gcc.dg/lto/20100722-1_0.c: New testcase.

From-SVN: r162414

gcc/testsuite/ChangeLog

+2010-07-22  Richard Guenther  <rguenther@suse.de>
+
+	* lib/target-supports-dg.exp (dg-require-linker-plugin): New proc.
+	* lib/target-supports.exp (check_linker_plugin_available): Likewise.
+
+	PR lto/43373
+	* gcc.dg/lto/20100722-1_0.c: New testcase.
+
 2010-07-22  Martin Jambor  <mjambor@suse.cz>
 
 	PR tree-optimization/44891

gcc/testsuite/gcc.dg/lto/20100722-1_0.c

+/* { dg-lto-do run } */
+/* { dg-require-lto-plugin "" } */
+/* { dg-extra-ld-options "-fuse-linker-plugin" } */
+
+int main() { return 0; }
+

gcc/testsuite/lib/target-supports-dg.exp

@@ -207,6 +207,14 @@ proc dg-require-host-local { args } {
     }
 }
 
+proc dg-require-linker-plugin { args } {
+    set linker_plugin_available [ check_linker_plugin_available ]
+    if { $linker_plugin_available == 0 } {
+	upvar dg-do-what dg-do-what
+	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
+    }
+}
+
 # Add any target-specific flags needed for accessing the given list
 # of features.  This must come after all dg-options.
 

gcc/testsuite/lib/target-supports.exp

@@ -886,6 +886,12 @@ proc check_effective_target_static_libgfortran { } {
     } "-static"]
 }
 
+proc check_linker_plugin_available { } {
+  return [check_no_compiler_messages_nocache linker_plugin executable {
+     int main() { return 0; }
+  } "-flto -fuse-linker-plugin"]
+}
+
 # Return 1 if the target supports executing 750CL paired-single instructions, 0
 # otherwise.  Cache the result.