; RUN: llc < %s -march=x86 -tailcallopt | not grep TAILCALL ; Bug 4396. This tail call can NOT be optimized. declare fastcc i8* @_D3gcx2GC12mallocNoSyncMFmkZPv() nounwind define fastcc i8* @_D3gcx2GC12callocNoSyncMFmkZPv() nounwind { entry: %tmp6 = tail call fastcc i8* @_D3gcx2GC12mallocNoSyncMFmkZPv() ; [#uses=2] %tmp9 = tail call i8* @memset(i8* %tmp6, i32 0, i64 2) ; [#uses=0] ret i8* %tmp6 } declare i8* @memset(i8*, i32, i64)