re PR target/84564 (error: unable to find a register to spill with -mforce-indirect-call)

	PR target/84564
	* config/i386/i386.c (ix86_function_ok_for_sibcall): Check for
	regparm >= 3 with no arg reg available also for calls with
	flag_force_indirect_call.  Pass decl to ix86_function_regparm.

	* gcc.target/i386/pr84564.c: New test.

From-SVN: r258256

gcc/ChangeLog

 2018-03-05  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/84564
+	* config/i386/i386.c (ix86_function_ok_for_sibcall): Check for
+	regparm >= 3 with no arg reg available also for calls with
+	flag_force_indirect_call.  Pass decl to ix86_function_regparm.
+
 	PR target/84524
 	* config/i386/sse.md (*<code><mode>3): Replace <mask_prefix3> with
 	orig,vex.

gcc/config/i386/i386.c

@@ -6415,7 +6415,8 @@ ix86_function_ok_for_sibcall (tree decl, tree exp)
 	 function via GOT slot are indirect.  */
       if (!decl
 	  || (bind_global && flag_pic && !flag_plt)
-	  || (TARGET_DLLIMPORT_DECL_ATTRIBUTES && DECL_DLLIMPORT_P (decl)))
+	  || (TARGET_DLLIMPORT_DECL_ATTRIBUTES && DECL_DLLIMPORT_P (decl))
+	  || flag_force_indirect_call)
 	{
 	  /* Check if regparm >= 3 since arg_reg_available is set to
 	     false if regparm == 0.  If regparm is 1 or 2, there is
@@ -6424,7 +6425,7 @@ ix86_function_ok_for_sibcall (tree decl, tree exp)
 	     ??? The symbol indirect call doesn't need a call-clobbered
 	     register.  But we don't know if this is a symbol indirect
 	     call or not here.  */
-	  if (ix86_function_regparm (type, NULL) >= 3
+	  if (ix86_function_regparm (type, decl) >= 3
 	      && !cfun->machine->arg_reg_available)
 	    return false;
 	}

gcc/testsuite/ChangeLog

+2018-03-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/84564
+	* gcc.target/i386/pr84564.c: New test.
+
 2018-03-05  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/84707
@@ -4234,7 +4239,7 @@
 
 	PR fortran/84141
 	PR fortran/84155
-	* gfortran.dg/pr84155.f90 : New test.
+	* gfortran.dg/pr84155.f90: New test.
 
 2017-02-02  Uros Bizjak  <ubizjak@gmail.com>
 
@@ -4493,7 +4498,7 @@
 2018-01-31  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/84088
-	* gfortran.dg/pr84088.f90 : New test.
+	* gfortran.dg/pr84088.f90: New test.
 
 2018-01-31  Vladimir Makarov  <vmakarov@redhat.com>
 

gcc/testsuite/gcc.target/i386/pr84564.c

+/* PR target/84564 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -mforce-indirect-call" } */
+
+int a, b, c, d;
+int foo (void);
+
+static int
+bar (int x, int y, int z)
+{
+  while (a)
+    if (foo ())
+      bar (x, y, z);
+  return 0;
+}
+
+int
+baz (void)
+{
+  return bar (b, c, d);
+}