-/// createX87FPRegKillInserterPass - This function returns a pass which
-/// inserts FP_REG_KILL instructions where needed.
-///
-FunctionPass *createX87FPRegKillInserterPass();
-
-/// createX86CodePrinterPass - Returns a pass that prints the X86
-/// assembly code for a MachineFunction to the given output stream,
-/// using the given target machine description.
-///
-FunctionPass *createX86CodePrinterPass(raw_ostream &o,
- X86TargetMachine &tm,
- bool fast);
-
-/// createX86CodeEmitterPass - Return a pass that emits the collected X86 code
-/// to the specified MCE object.
-FunctionPass *createX86CodeEmitterPass(X86TargetMachine &TM,
- MachineCodeEmitter &MCE);
+/// createX86IssueVZeroUpperPass - This pass inserts AVX vzeroupper instructions
+/// before each call to avoid transition penalty between functions encoded with
+/// AVX and SSE.
+FunctionPass *createX86IssueVZeroUpperPass();