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diff src/share/vm/oops/cpCache.hpp @ 23747:4da0ab22649c

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8157758: JDK9 does not compile on Linux with GCC 6.1 because left-shifting a negative number has undefined behavior Summary: Replace shifts of -1 with shifts of ~0u. Reviewed-by: kbarrett, mockner Contributed-by: alexhenrie24@gmail.com
author kbarrett
date Thu, 23 Jun 2016 16:46:41 -0400
parents b5f3a471e646
children 719853999215
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--- a/src/share/vm/oops/cpCache.hpp	Fri Aug 26 13:37:53 2016 -0700
+++ b/src/share/vm/oops/cpCache.hpp	Thu Jun 23 16:46:41 2016 -0400
@@ -192,7 +192,7 @@
     field_index_mask           = right_n_bits(field_index_bits),
     parameter_size_bits        = 8,  // subset of field_index_mask, range is 0..255
     parameter_size_mask        = right_n_bits(parameter_size_bits),
-    option_bits_mask           = ~(((-1) << tos_state_shift) | (field_index_mask | parameter_size_mask))
+    option_bits_mask           = ~(((~0u) << tos_state_shift) | (field_index_mask | parameter_size_mask))
   };
 
   // specific bit definitions for the indices field: