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-rw-r--r--compiler/codeGen/StgCmmPrim.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/codeGen/StgCmmPrim.hs b/compiler/codeGen/StgCmmPrim.hs
index 266ab3a0f6..f5437c0c3b 100644
--- a/compiler/codeGen/StgCmmPrim.hs
+++ b/compiler/codeGen/StgCmmPrim.hs
@@ -2295,6 +2295,7 @@ doWriteSmallPtrArrayOp :: CmmExpr
doWriteSmallPtrArrayOp addr idx val = do
dflags <- getDynFlags
let ty = cmmExprType dflags val
+ emitPrimCall [] MO_WriteBarrier [] -- #12469
mkBasicIndexedWrite (smallArrPtrsHdrSize dflags) Nothing addr ty idx val
emit (setInfo addr (CmmLit (CmmLabel mkSMAP_DIRTY_infoLabel)))