aarch64.c (aarch64_emit_probe_stack_range): Handle frame sizes that do not…

aarch64.c (aarch64_emit_probe_stack_range): Handle frame sizes that do not satisfy aarch64_uimm12_shift.

	* config/aarch64/aarch64.c (aarch64_emit_probe_stack_range): Handle
	frame sizes that do not satisfy aarch64_uimm12_shift.

	* gcc.c-torture/compile/stack-check-1.c: New test.

From-SVN: r249566

gcc/ChangeLog

+2017-06-22  Jeff Law  <law@redhat.com>
+
+	* config/aarch64/aarch64.c (aarch64_emit_probe_stack_range): Handle
+	frame sizes that do not satisfy aarch64_uimm12_shift.
+
 2017-06-22  Jan Hubicka <hubicka@ucw.cz>
 
 	* profile-count.h (apply_probability,

gcc/config/aarch64/aarch64.c

@@ -2766,11 +2766,19 @@ aarch64_emit_probe_stack_range (HOST_WIDE_INT first, HOST_WIDE_INT size)
 		     plus_constant (Pmode, stack_pointer_rtx, -first));
 
       /* LAST_ADDR = SP + FIRST + ROUNDED_SIZE.  */
-      emit_set_insn (reg2,
-		     plus_constant (Pmode, stack_pointer_rtx,
-				    -(first + rounded_size)));
-
-
+      HOST_WIDE_INT adjustment = - (first + rounded_size);
+      if (! aarch64_uimm12_shift (adjustment))
+	{
+	  aarch64_internal_mov_immediate (reg2, GEN_INT (adjustment),
+					  true, Pmode);
+	  emit_set_insn (reg2, gen_rtx_PLUS (Pmode, stack_pointer_rtx, reg2));
+	}
+      else
+	{
+	  emit_set_insn (reg2,
+			 plus_constant (Pmode, stack_pointer_rtx, adjustment));
+	}
+	  	
       /* Step 3: the loop
 
 	 do

gcc/testsuite/ChangeLog

+2017-06-22  Jeff Law  <law@redhat.com>
+
+	* gcc.c-torture/compile/stack-check-1.c: New test.
+
 2016-06-22  Richard Biener  <rguenther@suse.de>
 
 	* gcc.dg/vect/pr65947-1.c: Remove xfail.

gcc/testsuite/gcc.c-torture/compile/stack-check-1.c

+/* { dg-additional-options "-fstack-check" } */
+#include "20031023-1.c"