re PR target/6054 (GCC 3.1 for ia64 fails to restore gp after indirect call in Linux kernel)

        PR target/6054
        * config/ia64/ia64.c (ia64_expand_call): Use pic patterns for
        TARGET_CONST_GP.  Simplify conditions.

	* gcc.dg/20020326-1.c: New.

From-SVN: r51444

gcc/ChangeLog

 2002-03-27  Richard Henderson  <rth@redhat.com>
 
+	PR target/6054
+	* config/ia64/ia64.c (ia64_expand_call): Use pic patterns for
+	TARGET_CONST_GP.  Simplify conditions.
+
+2002-03-27  Richard Henderson  <rth@redhat.com>
+
 	* config/sparc/freebsd.h, config/sparc/linux.h, config/sparc/linux64.h,
 	config/sparc/netbsd-elf.h, config/sparc/pbd.h, config/sparc/sol2.h,
 	config/sparc/vxsim.h (LOCAL_LABEL_PREFIX): Define.

gcc/config/ia64/ia64.c

@@ -1144,7 +1144,8 @@ ia64_expand_call (retval, addr, nextarg, sibcall_p)
      rtx nextarg;
      int sibcall_p;
 {
-  rtx insn, b0, pfs, gp_save, narg_rtx;
+  rtx insn, b0, pfs, gp_save, narg_rtx, dest;
+  bool indirect_p;
   int narg;
 
   addr = XEXP (addr, 0);
@@ -1171,22 +1172,25 @@ ia64_expand_call (retval, addr, nextarg, sibcall_p)
       return;
     }
 
-  if (sibcall_p)
+  indirect_p = ! symbolic_operand (addr, VOIDmode);
+
+  if (sibcall_p || (TARGET_CONST_GP && !indirect_p))
     gp_save = NULL_RTX;
   else
     gp_save = ia64_gp_save_reg (setjmp_operand (addr, VOIDmode));
 
-  /* If this is an indirect call, then we have the address of a descriptor.  */
-  if (! symbolic_operand (addr, VOIDmode))
-    {
-      rtx dest;
-
-      if (! sibcall_p)
+  if (gp_save)
     emit_move_insn (gp_save, pic_offset_table_rtx);
 
+  /* If this is an indirect call, then we have the address of a descriptor.  */
+  if (indirect_p)
+    {
       dest = force_reg (DImode, gen_rtx_MEM (DImode, addr));
       emit_move_insn (pic_offset_table_rtx,
 		      gen_rtx_MEM (DImode, plus_constant (addr, 8)));
+    }
+  else
+    dest = addr;
 
   if (sibcall_p)
     insn = gen_sibcall_pic (dest, narg_rtx, b0, pfs);
@@ -1196,36 +1200,8 @@ ia64_expand_call (retval, addr, nextarg, sibcall_p)
     insn = gen_call_value_pic (retval, dest, narg_rtx, b0);
   emit_call_insn (insn);
 
-      if (! sibcall_p)
-	emit_move_insn (pic_offset_table_rtx, gp_save);
-    }
-  else if (TARGET_CONST_GP)
-    {
-      if (sibcall_p)
-	insn = gen_sibcall_nopic (addr, narg_rtx, b0, pfs);
-      else if (! retval)
-	insn = gen_call_nopic (addr, narg_rtx, b0);
-      else
-	insn = gen_call_value_nopic (retval, addr, narg_rtx, b0);
-      emit_call_insn (insn);
-    }
-  else
-    {
-      if (sibcall_p)
-	emit_call_insn (gen_sibcall_pic (addr, narg_rtx, b0, pfs));
-      else
-	{
-	  emit_move_insn (gp_save, pic_offset_table_rtx);
-
-	  if (! retval)
-	    insn = gen_call_pic (addr, narg_rtx, b0);
-	  else
-	    insn = gen_call_value_pic (retval, addr, narg_rtx, b0);
-	  emit_call_insn (insn);
-
+  if (gp_save)
     emit_move_insn (pic_offset_table_rtx, gp_save);
-	}
-    }
 }
 
 /* Begin the assembly file.  */

gcc/testsuite/gcc.dg/20020326-1.c

+/* PR target/6054 */
+/* { dg-do compile { target ia64-*-* } } */
+/* { dg-options "-O -mconstant-gp" } */
+/* { dg-final { scan-assembler "mov r1 =" } } */
+
+extern void direct (void);
+void foo(void (*indirect) (void))
+{
+  indirect ();
+  direct ();
+}