regclass.c (globalize_reg): Update regs_invalidated_by_call.

        * regclass.c (globalize_reg): Update regs_invalidated_by_call.
	* gcc.dg/20020616-1.c: New.

From-SVN: r54681

gcc/ChangeLog

+2002-06-16  Richard Henderson  <rth@redhat.com>
+
+	PR opt/6722
+	* regclass.c (globalize_reg): Update regs_invalidated_by_call.
+
 2002-06-16  Neil Booth  <neil@daikokuya.demon.co.uk>
 
-	* config.gcc: Add an i386/sysv4-cpp.h.  Remove i386-aout.h from
-	vxworks.
-config/i386:
-	* i386-aout.h, i386elf.h, sysv4.h: Remove CPP_PREDEFINES.
-	* linux64.h: Use TARGET_OS_CPP_BUILTINS rather than
+	* config.gcc: Add i386/sysv4-cpp.h; remove i386-aout.h from vxworks.
+	* config/i386/i386-aout.h, config/i386/i386elf.h,
+	config/i386/sysv4.h: Remove CPP_PREDEFINES.
+	* config/i386/linux64.h, config/i386/i386elf.h, config/i386/mach.h,
+	config/i386/netware.h, config/i386/rtemself.h, config/i386/sco5.h,
+	config/i386/sol2.h, config/i386/vsta.h, config/i386/vxi386.h,
+	config/i386/win32.h: Use TARGET_OS_CPP_BUILTINS rather than
 	CPP_PREDEFINES and part of CPP_SPEC.
-	i386elf.h, mach.h, netware.h, rtemself.h, sco5.h, sol2.h,
-	vsta.h, vxi386.h, win32.h: Similarly.
-	* sysv4-cpp.h: New.
+	* config/i386/sysv4-cpp.h: New.
 
 2002-06-16  Richard Henderson  <rth@redhat.com>
 

gcc/regclass.c

@@ -824,6 +824,7 @@ globalize_reg (i)
   SET_HARD_REG_BIT (fixed_reg_set, i);
   SET_HARD_REG_BIT (call_used_reg_set, i);
   SET_HARD_REG_BIT (call_fixed_reg_set, i);
+  SET_HARD_REG_BIT (regs_invalidated_by_call, i);
 }
 
 /* Now the data and code for the `regclass' pass, which happens

gcc/testsuite/gcc.dg/20020616-1.c

+/* PR opt/6722 */
+/* { dg-do run { target i?86-*-* } } */
+/* { dg-options "-O2" } */
+
+register int k asm("%ebx");
+
+void __attribute__((noinline))
+foo()
+{
+  k = 1;
+}
+
+void test()
+{
+  int i;
+  for (i = 0; i < 10; i += k)
+    {
+      k = 0;
+      foo();
+    }
+}
+
+int main()
+{
+  int old = k;
+  test();
+  k = old;
+  return 0;
+}