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-rw-r--r--compiler/GHC/StgToCmm/Prim.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/GHC/StgToCmm/Prim.hs b/compiler/GHC/StgToCmm/Prim.hs
index d222c783b3..048da3c14f 100644
--- a/compiler/GHC/StgToCmm/Prim.hs
+++ b/compiler/GHC/StgToCmm/Prim.hs
@@ -1562,6 +1562,7 @@ emitPrimOp cfg primop =
ResizeMutableByteArrayOp_Char -> alwaysExternal
ShrinkSmallMutableArrayOp_Char -> alwaysExternal
NewMutVarOp -> alwaysExternal
+ AtomicSwapMutVarOp -> alwaysExternal
AtomicModifyMutVar2Op -> alwaysExternal
AtomicModifyMutVar_Op -> alwaysExternal
CasMutVarOp -> alwaysExternal