AVR: PR target/86776: Implement CVE-2017-5753.

gcc/
	PR target/86776
	* config/avr/avr.cc (TARGET_HAVE_SPECULATION_SAFE_VALUE): Define
	to speculation_safe_value_not_needed.

diff --git a/gcc/config/avr/avr.cc b/gcc/config/avr/avr.cc
index c3e0995dfc3b008524cda7de26f0c86bbaf8dcfa..a297f4e092a8a89f50de0649d91f63423b4f09eb 100644 (file)
--- a/gcc/config/avr/avr.cc
+++ b/gcc/config/avr/avr.cc
@@ -15309,6 +15309,12 @@ avr_float_lib_compare_returns_bool (machine_mode mode, enum rtx_code)
 #undef  TARGET_CANONICALIZE_COMPARISON
 #define TARGET_CANONICALIZE_COMPARISON avr_canonicalize_comparison
 
+/* According to the opening comment in PR86772, the following applies:
+  "If the port does not (and never will in the future) need to mitigate
+   against unsafe speculation."  */
+#undef  TARGET_HAVE_SPECULATION_SAFE_VALUE
+#define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 \f