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-rw-r--r--compiler/codeGen/StgCmmPrim.hs3
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/codeGen/StgCmmPrim.hs b/compiler/codeGen/StgCmmPrim.hs
index 7661e9f8fb..b5cd267c6b 100644
--- a/compiler/codeGen/StgCmmPrim.hs
+++ b/compiler/codeGen/StgCmmPrim.hs
@@ -306,6 +306,9 @@ emitPrimOp dflags [res] GetCCSOfOp [arg]
emitPrimOp _ [res] GetCurrentCCSOp [_dummy_arg]
= emitAssign (CmmLocal res) cccsExpr
+emitPrimOp _ [res] MyThreadIdOp []
+ = emitAssign (CmmLocal res) currentTSOExpr
+
emitPrimOp dflags [res] ReadMutVarOp [mutv]
= emitAssign (CmmLocal res) (cmmLoadIndexW dflags mutv (fixedHdrSizeW dflags) (gcWord dflags))