Keep Touch'd variables live through the back end

[ghc-hetmet.git] / compiler / cmm / CmmCvt.hs

diff --git a/compiler/cmm/CmmCvt.hs b/compiler/cmm/CmmCvt.hs
index 7f5de60..4d41325 100644 (file)
--- a/compiler/cmm/CmmCvt.hs
+++ b/compiler/cmm/CmmCvt.hs
@@ -115,6 +115,7 @@ ofZgraph g = ListGraph $ swallow blocks
           mid (MidComment s)  = CmmComment s
           mid (MidAssign l r) = CmmAssign l r
           mid (MidStore  l r) = CmmStore  l r
+          mid (MidForeignCall _ (PrimTarget MO_Touch) _ _) = CmmNop
           mid (MidForeignCall _ target ress args)
                = CmmCall (cmm_target target)
                          (add_hints conv Results   ress)