[commit: ghc] master: IcmmMachOpFoldM: clarify panic message (594123f)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/594123f57779464c9b7c0f51445639e15b8bd55c/ghc

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commit 594123f57779464c9b7c0f51445639e15b8bd55c
Author: Sergei Trofimovich <slyfox at gentoo.org>
Date:   Sat Feb 11 13:05:24 2017 +0000

    IcmmMachOpFoldM: clarify panic message
    
    When adding a new primop cinimod noticed
    uninformative ghc panic:
        cmmMachOpFoldM: unknown unary op
    
    This change tweaks panic to contain the op:
        cmmMachOpFoldM: unknown unary op: MO_F_Neg W64
    
    Signed-off-by: Sergei Trofimovich <slyfox at gentoo.org>


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594123f57779464c9b7c0f51445639e15b8bd55c
 compiler/cmm/CmmOpt.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/cmm/CmmOpt.hs b/compiler/cmm/CmmOpt.hs
index 8d1641a..38c399e 100644
--- a/compiler/cmm/CmmOpt.hs
+++ b/compiler/cmm/CmmOpt.hs
@@ -79,7 +79,7 @@ cmmMachOpFoldM _ op [CmmLit (CmmInt x rep)]
       MO_SS_Conv  from to -> CmmLit (CmmInt (narrowS from x) to)
       MO_UU_Conv  from to -> CmmLit (CmmInt (narrowU from x) to)
 
-      _ -> panic "cmmMachOpFoldM: unknown unary op"
+      _ -> panic $ "cmmMachOpFoldM: unknown unary op: " ++ show op
 
 
 -- Eliminate conversion NOPs