FIX #1424: x86_64 NCG generated wrong code for foreign call with >8 double args

I guess we have a missing test... I'll add one

diff --git a/compiler/nativeGen/MachCodeGen.hs b/compiler/nativeGen/MachCodeGen.hs
index 0bab29c..d371214 100644 (file)
--- a/compiler/nativeGen/MachCodeGen.hs
+++ b/compiler/nativeGen/MachCodeGen.hs
@@ -3361,9 +3361,9 @@ genCCall target dest_regs args vols = do
         (arg_reg, arg_code) <- getSomeReg arg
          delta <- getDeltaNat
          setDeltaNat (delta-arg_size)
-        let code' = code `appOL` toOL [
-                       MOV arg_rep (OpReg arg_reg) (OpAddr  (spRel 0)),
+        let code' = code `appOL` arg_code `appOL` toOL [
                        SUB wordRep (OpImm (ImmInt arg_size)) (OpReg rsp) ,
+                       MOV arg_rep (OpReg arg_reg) (OpAddr  (spRel 0)),
                        DELTA (delta-arg_size)]
         push_args rest code'