re PR target/45296 (register long double ICE at -O2, -Os, -O3)

	PR target/45296
	* reginfo.c (globalize_reg): Reject stack registers.

testsuite/ChangeLog:

	PR target/45296
	* gcc.target/i386/pr45296.c: New test.

From-SVN: r163303

gcc/ChangeLog

+2010-08-17  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/45296
+	* reginfo.c (globalize_reg): Reject stack registers.
+
 2010-08-17  Richard Guenther  <rguenther@suse.de>
 
 	* tree-ssa-dom.c (struct edge_info): Use a VEC for the
@@ -112,8 +117,7 @@
 	(decode_options): Update call to decode_cmdline_options_to_array.
 	(print_filtered_help): Ignore driver-only options.
 	(print_specific_help): Ignore CL_DRIVER.
-	(common_handle_option): Don't call print_specific_help for
-	CL_DRIVER.
+	(common_handle_option): Don't call print_specific_help for CL_DRIVER.
 	* opts.h (CL_DRIVER, CL_REJECT_DRIVER): Define.
 	(CL_PARAMS, CL_WARNING, CL_OPTIMIZATION, CL_TARGET, CL_COMMON):
 	Update values.

gcc/reginfo.c

@@ -798,6 +798,14 @@ fix_register (const char *name, int fixed, int call_used)
 void
 globalize_reg (int i)
 {
+#ifdef STACK_REGS
+  if (IN_RANGE (i, FIRST_STACK_REG, LAST_STACK_REG))
+    {
+      error ("stack register used for global register variable");
+      return;
+    }
+#endif
+
   if (fixed_regs[i] == 0 && no_global_reg_vars)
     error ("global register variable follows a function definition");
 

gcc/testsuite/ChangeLog

+2010-08-17  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/45296
+	* gcc.target/i386/pr45296.c: New test.
+
 2010-08-17  Kai Tietz  <kai.tietz@onevision.com>
 
 	* g++.dg/ext/uow-1.C: New.

gcc/testsuite/gcc.target/i386/pr45296.c

+/* { dg-do compile } */
+/* { dg-options "" } */
+
+register long double F80 asm("st"); /* { dg-error "stack register" } */