[lldb] NFC modernize codebase with modernize-use-nullptr

Summary:
NFC = [[ https://llvm.org/docs/Lexicon.html#nfc | Non functional change ]]

This commit is the result of modernizing the LLDB codebase by using
`nullptr` instread of `0` or `NULL`. See
https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-nullptr.html
for more information.

This is the command I ran and I to fix and format the code base:

```
run-clang-tidy.py \
	-header-filter='.*' \
	-checks='-*,modernize-use-nullptr' \
	-fix ~/dev/llvm-project/lldb/.* \
	-format \
	-style LLVM \
	-p ~/llvm-builds/debug-ninja-gcc
```

NOTE: There were also changes to `llvm/utils/unittest` but I did not
include them because I felt that maybe this library shall be updated in
isolation somehow.

NOTE: I know this is a rather large commit but it is a nobrainer in most
parts.

Reviewers: martong, espindola, shafik, #lldb, JDevlieghere

Reviewed By: JDevlieghere

Subscribers: arsenm, jvesely, nhaehnle, hiraditya, JDevlieghere, teemperor, rnkovacs, emaste, kubamracek, nemanjai, ki.stfu, javed.absar, arichardson, kbarton, jrtc27, MaskRay, atanasyan, dexonsmith, arphaman, jfb, jsji, jdoerfert, lldb-commits, llvm-commits

Tags: #lldb, #llvm

Differential Revision: https://reviews.llvm.org/D61847

llvm-svn: 361484

1 files changed, 7 insertions, 6 deletions

diff --git a/lldb/source/API/SBInstruction.cpp b/lldb/source/API/SBInstruction.cpp
index 8502aad9dbb..fcf66fd2582 100644
--- a/lldb/source/API/SBInstruction.cpp
+++ b/lldb/source/API/SBInstruction.cpp
@@ -127,7 +127,7 @@ const char *SBInstruction::GetMnemonic(SBTarget target) {
     }
     return inst_sp->GetMnemonic(&exe_ctx);
   }
-  return NULL;
+  return nullptr;
 }
 
 const char *SBInstruction::GetOperands(SBTarget target) {
@@ -147,7 +147,7 @@ const char *SBInstruction::GetOperands(SBTarget target) {
     }
     return inst_sp->GetOperands(&exe_ctx);
   }
-  return NULL;
+  return nullptr;
 }
 
 const char *SBInstruction::GetComment(SBTarget target) {
@@ -167,7 +167,7 @@ const char *SBInstruction::GetComment(SBTarget target) {
     }
     return inst_sp->GetComment(&exe_ctx);
   }
-  return NULL;
+  return nullptr;
 }
 
 size_t SBInstruction::GetByteSize() {
@@ -249,7 +249,7 @@ bool SBInstruction::GetDescription(lldb::SBStream &s) {
     // didn't have a stream already created, one will get created...
     FormatEntity::Entry format;
     FormatEntity::Parse("${addr}: ", format);
-    inst_sp->Dump(&s.ref(), 0, true, false, NULL, &sc, NULL, &format, 0);
+    inst_sp->Dump(&s.ref(), 0, true, false, nullptr, &sc, nullptr, &format, 0);
     return true;
   }
   return false;
@@ -258,7 +258,7 @@ bool SBInstruction::GetDescription(lldb::SBStream &s) {
 void SBInstruction::Print(FILE *out) {
   LLDB_RECORD_METHOD(void, SBInstruction, Print, (FILE *), out);
 
-  if (out == NULL)
+  if (out == nullptr)
     return;
 
   lldb::InstructionSP inst_sp(GetOpaque());
@@ -272,7 +272,8 @@ void SBInstruction::Print(FILE *out) {
     StreamFile out_stream(out, false);
     FormatEntity::Entry format;
     FormatEntity::Parse("${addr}: ", format);
-    inst_sp->Dump(&out_stream, 0, true, false, NULL, &sc, NULL, &format, 0);
+    inst_sp->Dump(&out_stream, 0, true, false, nullptr, &sc, nullptr, &format,
+                  0);
   }
 }