xref: /openbsd-src/gnu/llvm/llvm/tools/llvm-reduce/deltas/ReduceGlobalValues.cpp (revision d415bd752c734aee168c4ee86ff32e8cc249eb16) 
1 //===- ReduceGlobalValues.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 to reduce
10 // global value attributes/specifiers.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "ReduceGlobalValues.h"
15 #include "llvm/IR/GlobalValue.h"
16 
17 using namespace llvm;
18 
shouldReduceDSOLocal(GlobalValue & GV)19 static bool shouldReduceDSOLocal(GlobalValue &GV) {
20   return GV.isDSOLocal() && !GV.isImplicitDSOLocal();
21 }
22 
shouldReduceVisibility(GlobalValue & GV)23 static bool shouldReduceVisibility(GlobalValue &GV) {
24   return GV.getVisibility() != GlobalValue::VisibilityTypes::DefaultVisibility;
25 }
26 
shouldReduceUnnamedAddress(GlobalValue & GV)27 static bool shouldReduceUnnamedAddress(GlobalValue &GV) {
28   return GV.getUnnamedAddr() != GlobalValue::UnnamedAddr::None;
29 }
30 
shouldReduceDLLStorageClass(GlobalValue & GV)31 static bool shouldReduceDLLStorageClass(GlobalValue &GV) {
32   return GV.getDLLStorageClass() !=
33          GlobalValue::DLLStorageClassTypes::DefaultStorageClass;
34 }
35 
shouldReduceThreadLocal(GlobalValue & GV)36 static bool shouldReduceThreadLocal(GlobalValue &GV) {
37   return GV.isThreadLocal();
38 }
39 
reduceGVs(Oracle & O,ReducerWorkItem & Program)40 static void reduceGVs(Oracle &O, ReducerWorkItem &Program) {
41   for (auto &GV : Program.getModule().global_values()) {
42     if (shouldReduceDSOLocal(GV) && !O.shouldKeep())
43       GV.setDSOLocal(false);
44     if (shouldReduceVisibility(GV) && !O.shouldKeep()) {
45       bool IsImplicitDSOLocal = GV.isImplicitDSOLocal();
46       GV.setVisibility(GlobalValue::VisibilityTypes::DefaultVisibility);
47       if (IsImplicitDSOLocal)
48         GV.setDSOLocal(false);
49     }
50     if (shouldReduceUnnamedAddress(GV) && !O.shouldKeep())
51       GV.setUnnamedAddr(GlobalValue::UnnamedAddr::None);
52     if (shouldReduceDLLStorageClass(GV) && !O.shouldKeep())
53       GV.setDLLStorageClass(
54           GlobalValue::DLLStorageClassTypes::DefaultStorageClass);
55     if (shouldReduceThreadLocal(GV) && !O.shouldKeep())
56       GV.setThreadLocal(false);
57   }
58 }
59 
reduceGlobalValuesDeltaPass(TestRunner & Test)60 void llvm::reduceGlobalValuesDeltaPass(TestRunner &Test) {
61   runDeltaPass(Test, reduceGVs, "Reducing GlobalValues");
62 }
63