1 | //===- ReduceDbgRecords.cpp - Specialized Delta Pass ----------------------===// |
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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 DbgVariableRecords from defined functions. |
11 | // |
12 | // DbgVariableRecords store variable-location debug-info and are attached to |
13 | // instructions. This information used to be represented by intrinsics such as |
14 | // dbg.value, and would naturally get reduced by llvm-reduce like any other |
15 | // instruction. As DbgVariableRecords get stored elsewhere, they need to be |
16 | // enumerated and eliminated like any other data structure in LLVM. |
17 | // |
18 | //===----------------------------------------------------------------------===// |
19 | |
20 | #include "ReduceDbgRecords.h" |
21 | #include "llvm/ADT/STLExtras.h" |
22 | #include "llvm/IR/BasicBlock.h" |
23 | #include "llvm/IR/DebugProgramInstruction.h" |
24 | |
25 | using namespace llvm; |
26 | |
27 | void llvm::reduceDbgRecordDeltaPass(Oracle &O, ReducerWorkItem &WorkItem) { |
28 | Module &M = WorkItem.getModule(); |
29 | |
30 | for (auto &F : M) |
31 | for (auto &BB : F) |
32 | for (auto &I : BB) |
33 | for (DbgRecord &DR : llvm::make_early_inc_range(Range: I.getDbgRecordRange())) |
34 | if (!O.shouldKeep()) |
35 | DR.eraseFromParent(); |
36 | } |
37 |