1 //===- ReduceInstructionFlagsMIR.cpp - Specialized Delta Pass -------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements a function which calls the Generic Delta pass in order
10 // to reduce uninteresting MachineInstr flags from the MachineFunction.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "ReduceInstructionFlagsMIR.h"
15 #include "llvm/CodeGen/MachineFunction.h"
16 using namespace llvm;
17 
18 static void removeFlagsFromModule(Oracle &O, ReducerWorkItem &WorkItem) {
19   for (const Function &F : WorkItem.getModule()) {
20     if (auto *MF = WorkItem.MMI->getMachineFunction(F)) {
21       for (MachineBasicBlock &MBB : *MF) {
22         for (MachineInstr &MI : MBB) {
23           // TODO: Should this clear flags individually?
24           if (MI.getFlags() != 0 && !O.shouldKeep())
25             MI.setFlags(0);
26         }
27       }
28     }
29   }
30 }
31 
32 void llvm::reduceInstructionFlagsMIRDeltaPass(TestRunner &Test) {
33   outs() << "*** Reducing Instruction flags...\n";
34   runDeltaPass(Test, removeFlagsFromModule);
35 }
36