re PR target/90724 (ICE with __sync_bool_compare_and_swap with -march=armv8.2-a+sve)

2019-08-21  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

	PR target/90724
	* config/aarch64/aarch64.c (aarch64_gen_compare_reg_maybe_ze): Force y
	in reg if it fails aarch64_plus_operand predicate.

From-SVN: r274805

gcc/ChangeLog

+2019-08-21  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
+
+	PR target/90724
+	* config/aarch64/aarch64.c (aarch64_gen_compare_reg_maybe_ze): Force y
+	in reg if it fails aarch64_plus_operand predicate.
+
 2019-08-21  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/91482

gcc/config/aarch64/aarch64.c

@@ -2070,6 +2070,9 @@ aarch64_gen_compare_reg_maybe_ze (RTX_CODE code, rtx x, rtx y,
 	}
     }
 
+  if (!aarch64_plus_operand (y, y_mode))
+    y = force_reg (y_mode, y);
+
   return aarch64_gen_compare_reg (code, x, y);
 }