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diff src/cpu/x86/vm/globals_x86.hpp @ 14440:41b780b43b74

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8029015: PPC64 (part 216): opto: trap based null and range checks Summary: On PPC64 use tdi instruction that does a compare and raises SIGTRAP for NULL and range checks. Reviewed-by: kvn
author goetz
date Wed, 27 Nov 2013 16:16:21 -0800
parents 5ccbab1c69f3
children d8041d695d19 9e9af3aa4278 62c54fcc0a35
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--- a/src/cpu/x86/vm/globals_x86.hpp	Tue Nov 26 18:38:19 2013 -0800
+++ b/src/cpu/x86/vm/globals_x86.hpp	Wed Nov 27 16:16:21 2013 -0800
@@ -37,7 +37,8 @@
 define_pd_global(bool, NeedsDeoptSuspend,        false); // only register window machines need this
 
 define_pd_global(bool, ImplicitNullChecks,       true);  // Generate code for implicit null checks
-define_pd_global(bool, UncommonNullCast,         true);  // Uncommon-trap NULLs past to check cast
+define_pd_global(bool, TrapBasedNullChecks,      false); // Not needed on x86.
+define_pd_global(bool, UncommonNullCast,         true);  // Uncommon-trap NULLs passed to check cast
 
 // See 4827828 for this change. There is no globals_core_i486.hpp. I can't
 // assign a different value for C2 without touching a number of files. Use