(untyped_call, blockage): New patterns.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@3839 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 37 insertions, 0 deletions

diff --git a/gcc/config/ns32k/ns32k.md b/gcc/config/ns32k/ns32k.md
index b3ea5ef27d4..dd0c21f07d4 100644
--- a/gcc/config/ns32k/ns32k.md
+++ b/gcc/config/ns32k/ns32k.md
@@ -2273,6 +2273,43 @@
   return \"jsr %1\";
 }")
 
+;; Call subroutine returning any type.
+
+(define_expand "untyped_call"
+  [(parallel [(call (match_operand 0 "" "")
+		    (const_int 0))
+	      (match_operand 1 "" "")
+	      (match_operand 2 "" "")])]
+  ""
+  "
+{
+  int i;
+
+  emit_call_insn (gen_call (operands[0], const0_rtx, NULL, const0_rtx));
+
+  for (i = 0; i < XVECLEN (operands[2], 0); i++)
+    {
+      rtx set = XVECEXP (operands[2], 0, i);
+      emit_move_insn (SET_DEST (set), SET_SRC (set));
+    }
+
+  /* The optimizer does not know that the call sets the function value
+     registers we stored in the result block.  We avoid problems by
+     claiming that all hard registers are used and clobbered at this
+     point.  */
+  emit_insn (gen_blockage ());
+
+  DONE;
+}")
+
+;; UNSPEC_VOLATILE is considered to use and clobber all hard registers and
+;; all of memory.  This blocks insns from being moved across this point.
+
+(define_insn "blockage"
+  [(unspec_volatile [(const_int 0)] 0)]
+  ""
+  "")
+
 (define_insn "return"
   [(return)]
   "0"