llvm-dwarfdump: support the --ignore-case option.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@314723 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 706e8dc)

Author: adrian-prantl

test/tools/llvm-dwarfdump/X86/name.test

@@ -37,3 +37,10 @@ RUN: llvm-dwarfdump %S/../../dsymutil/Inputs/odr-anon-namespace/1.o \
 RUN:    -name="(anonymous namespace)" \
 RUN:   | FileCheck %s --check-prefix=EMPTY
 
+Test the -ignore-case option.
+RUN: llvm-mc %S/brief.s -filetype obj -triple x86_64-apple-darwin -o - \
+RUN:   | llvm-dwarfdump -name=Main - | FileCheck %s -check-prefix=EMPTY
+RUN: llvm-mc %S/brief.s -filetype obj -triple x86_64-apple-darwin -o - \
+RUN:   | llvm-dwarfdump -name=Main -i - | FileCheck %s
+RUN: llvm-mc %S/brief.s -filetype obj -triple x86_64-apple-darwin -o - \
+RUN:   | llvm-dwarfdump -name=MAIN -ignore-case - | FileCheck %s

test/tools/llvm-dwarfdump/cmdline.test

@@ -7,6 +7,7 @@ HELP: -debug-info            - Dump the .debug_info section
 HELP: -eh-frame
 HELP: Specific Options
 HELP: -find
+HELP: -ignore-case
 HELP: -name
 HELP: -recurse-depth=<N>
 HELP: -show-children

tools/llvm-dwarfdump/llvm-dwarfdump.cpp

@@ -143,6 +143,12 @@ static list<std::string>
               "-name option can be used instead."),
          value_desc("name"), cat(DwarfDumpCategory));
 static alias FindAlias("f", desc("Alias for -find"), aliasopt(Find));
+static opt<bool>
+    IgnoreCase("ignore-case",
+               desc("Ignore case distinctions in when searching by name."),
+               value_desc("i"), cat(DwarfDumpCategory));
+static alias IgnoreCaseAlias("i", desc("Alias for -ignore-case"),
+                             aliasopt(IgnoreCase));
 static list<std::string>
     Name("name",
          desc("Find and print all debug info entries whose name (DW_AT_name "
@@ -265,8 +271,11 @@ static void filterByName(const StringSet<> &Names,
   for (const auto &CU : CUs)
     for (const auto &Entry : CU->dies()) {
       DWARFDie Die = {CU.get(), &Entry};
-      if (Names.count(Die.getName(DINameKind::ShortName)))
-        Die.dump(OS, 0, getDumpOpts());
+      if (const char *NamePtr = Die.getName(DINameKind::ShortName)) {
+        std::string Name = IgnoreCase ? StringRef(NamePtr).lower() : NamePtr;
+        if (Names.count(Name))
+          Die.dump(OS, 0, getDumpOpts());
+      }
     }
 }
 
@@ -283,7 +292,7 @@ static bool dumpObjectFile(ObjectFile &Obj, DWARFContext &DICtx, Twine Filename,
   if (!Name.empty()) {
     StringSet<> Names;
     for (auto name : Name)
-      Names.insert(name);
+      Names.insert(IgnoreCase ? StringRef(name).lower() : name);
 
     filterByName(Names, DICtx.compile_units(), OS);
     filterByName(Names, DICtx.dwo_compile_units(), OS);