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-rw-r--r--lib/Target/X86/X86ISelLowering.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index ca812c84bd..f698ceceac 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -2532,6 +2532,11 @@ X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
}
}
+ // An stdcall caller is expected to clean up its arguments; the callee
+ // isn't going to do that. PR 8461.
+ if (!CCMatch && CallerCC==CallingConv::X86_StdCall)
+ return false;
+
return true;
}