stmt.c (expand_asm_operands): If an ASM has no outputs, then treat it as volatile.

	* stmt.c (expand_asm_operands): If an ASM has no outputs, then treat
	it as volatile.

From-SVN: r17100

2 files changed, 9 insertions, 0 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 76a30f9..c9ea3e8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Mon Dec 15 08:48:24 1997  Jeffrey A Law  (law@cygnus.com)
+
+	* stmt.c (expand_asm_operands): If an ASM has no outputs, then treat
+	it as volatile.
+
 Mon Dec 15 00:04:48 1997  Jeffrey A Law  (law@cygnus.com)
 
         * haifa-sched.c (remove_dependencies): Set RTX_INTEGRATED_P on
diff --git a/gcc/stmt.c b/gcc/stmt.c
index 1839034..3286748 100644
--- a/gcc/stmt.c
+++ b/gcc/stmt.c
@@ -1421,6 +1421,10 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
   /* The insn we have emitted.  */
   rtx insn;
 
+  /* An ASM with no outputs needs to be treated as volatile.  */
+  if (noutputs == 0)
+    vol = 1;
+
   if (output_bytecode)
     {
       error ("`asm' is invalid when generating bytecode");