re PR target/90568 (stack protector should use cmp or sub, not xor, to allow macro...

	PR target/90568
	* config/i386/i386.md (stack_protect_test_<mode>): Use sub instead
	of xor.

From-SVN: r271552

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2ccb803d5c6857a9757e5c69391e3671e2435c50..e49c75847f1c618be270a8d46e6914e8e96e6e6f 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-05-23  Jakub Jelinek  <jakub@redhat.com>
+
+       PR target/90568
+       * config/i386/i386.md (stack_protect_test_<mode>): Use sub instead
+       of xor.
+
 2019-05-23  Martin Liska  <mliska@suse.cz>
 
        PR sanitizer/90570

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index da5163de80e68e6ef728ede3364d7be520faaa21..3fd11e2e4a2a8d103b00904b49296ad7790433a3 100644 (file)
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -19521,7 +19521,7 @@
                    UNSPEC_SP_TEST))
    (clobber (match_scratch:PTR 3 "=&r"))]
   ""
-  "mov{<imodesuffix>}\t{%1, %3|%3, %1}\;xor{<imodesuffix>}\t{%2, %3|%3, %2}"
+  "mov{<imodesuffix>}\t{%1, %3|%3, %1}\;sub{<imodesuffix>}\t{%2, %3|%3, %2}"
   [(set_attr "type" "multi")])
 
 (define_insn "sse4_2_crc32<mode>"