Use ud2 assembly mnemonic when available.

gcc/
	* configure.ac (HAVE_AS_IX86_UD2): New test for 'ud2' mnemonic.
	* configure: Regenerated.
	* config.in: Regenerated.
	* config/i386/i386.md (trap) [HAVE_AS_IX86_UD2]: Use the mnemonic
	instead of ASM_SHORT.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@207789 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 31 insertions, 0 deletions

diff --git a/gcc/configure b/gcc/configure
index 3ecd194346e..cab3e926d9f 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -25109,6 +25109,37 @@ $as_echo "#define HAVE_AS_IX86_REP_LOCK_PREFIX 1" >>confdefs.h
 
 fi
 
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for ud2 mnemonic" >&5
+$as_echo_n "checking assembler for ud2 mnemonic... " >&6; }
+if test "${gcc_cv_as_ix86_ud2+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_as_ix86_ud2=no
+  if test x$gcc_cv_as != x; then
+    $as_echo 'ud2' > conftest.s
+    if { ac_try='$gcc_cv_as $gcc_cv_as_flags  -o conftest.o conftest.s >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+    then
+	gcc_cv_as_ix86_ud2=yes
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_ix86_ud2" >&5
+$as_echo "$gcc_cv_as_ix86_ud2" >&6; }
+if test $gcc_cv_as_ix86_ud2 = yes; then
+
+$as_echo "#define HAVE_AS_IX86_UD2 1" >>confdefs.h
+
+fi
+
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for R_386_TLS_GD_PLT reloc" >&5
 $as_echo_n "checking assembler for R_386_TLS_GD_PLT reloc... " >&6; }
 if test "${gcc_cv_as_ix86_tlsgdplt+set}" = set; then :