1; RUN: llc < %s -march=x86 -tailcallopt | not grep TAILCALL 2 3; Bug 4396. This tail call can NOT be optimized. 4 5declare fastcc i8* @_D3gcx2GC12mallocNoSyncMFmkZPv() nounwind 6 7define fastcc i8* @_D3gcx2GC12callocNoSyncMFmkZPv() nounwind { 8entry: 9 %tmp6 = tail call fastcc i8* @_D3gcx2GC12mallocNoSyncMFmkZPv() ; <i8*> [#uses=2] 10 %tmp9 = tail call i8* @memset(i8* %tmp6, i32 0, i64 2) ; <i8*> [#uses=0] 11 ret i8* %tmp6 12} 13 14declare i8* @memset(i8*, i32, i64) 15