[ThinLTO] Use semicolon to separate path prefix replacement

[rnk]

Summary

Colons can appear in Windows paths after drive letters. Both colon and
semicolon are valid characters in filenames, but neither are very
common. Semicolon seems just as good, and makes the test pass on
Windows.

[tejohnson]

Thanks, Reid! Noted a couple of other places that need fix. Also test/tools/gold/X86/thinlto_prefix_replace.ll needs the same option change.

tools/gold/gold-plugin.cpp

1222–1223

The above 2 lines need changing as well.

tools/llvm-lto/llvm-lto.cpp

111

Description needs update.

[rnk]

• Really replace colon with semicolon

[tejohnson]

Thanks again!

test/ThinLTO/X86/prefix_replace.ll

 ; Check that changing the output path via prefix-replace works
 ; Use of '/' in paths created here make this unsuitable for Windows.
-; REQUIRES: shell
 ; RUN: mkdir -p %T/oldpath
 ; RUN: opt -module-summary %s -o %T/oldpath/prefix_replace.o
 ; Ensure that there is no existing file at the new path, so we properly
 ; test the creation of the new file there.
 ; RUN: rm -f %T/newpath/prefix_replace.o.thinlto.bc
 
 ; RUN: llvm-lto -thinlto-action=thinlink -o %t.index.bc %T/oldpath/prefix_replace.o
-; RUN: llvm-lto -thinlto-action=distributedindexes -thinlto-prefix-replace="%T/oldpath/:%T/newpath/" -thinlto-index %t.index.bc %T/oldpath/prefix_replace.o
+; RUN: llvm-lto -thinlto-action=distributedindexes -thinlto-prefix-replace="%T/oldpath/;%T/newpath/" -thinlto-index %t.index.bc %T/oldpath/prefix_replace.o
 
 ; RUN: ls %T/newpath/prefix_replace.o.thinlto.bc
 
 define void @f() {
 entry:
   ret void
 }

test/tools/gold/X86/thinlto_prefix_replace.ll

 ; Check that changing the output path via thinlto-prefix-replace works
 ; RUN: mkdir -p %T/oldpath
 ; RUN: opt -module-summary %s -o %T/oldpath/thinlto_prefix_replace.o
 ; Ensure that there is no existing file at the new path, so we properly
 ; test the creation of the new file there.
 ; RUN: rm -f %T/newpath/thinlto_prefix_replace.o.thinlto.bc
 ; RUN: %gold -plugin %llvmshlibdir/LLVMgold.so \
 ; RUN:    --plugin-opt=thinlto \
 ; RUN:    --plugin-opt=thinlto-index-only \
-; RUN:    --plugin-opt=thinlto-prefix-replace="%T/oldpath/:%T/newpath/" \
+; RUN:    --plugin-opt=thinlto-prefix-replace="%T/oldpath/;%T/newpath/" \
 ; RUN:    -shared %T/oldpath/thinlto_prefix_replace.o -o %T/thinlto_prefix_replace
 ; RUN: ls %T/newpath/thinlto_prefix_replace.o.thinlto.bc
 
 define void @f() {
 entry:
   ret void
 }

tools/gold/gold-plugin.cpp

static void process_plugin_option(const char *opt_)
     } else if (opt == "thinlto") {
       thinlto = true;
     } else if (opt == "thinlto-index-only") {
       thinlto_index_only = true;
     } else if (opt == "thinlto-emit-imports-files") {
       thinlto_emit_imports_files = true;
     } else if (opt.startswith("thinlto-prefix-replace=")) {
       thinlto_prefix_replace = opt.substr(strlen("thinlto-prefix-replace="));
-      if (thinlto_prefix_replace.find(":") == std::string::npos)
-        message(LDPL_FATAL, "thinlto-prefix-replace expects 'old:new' format");
+      if (thinlto_prefix_replace.find(";") == std::string::npos)
+        message(LDPL_FATAL, "thinlto-prefix-replace expects 'old;new' format");
     } else if (opt.size() == 2 && opt[0] == 'O') {
       if (opt[1] < '0' || opt[1] > '3')
         message(LDPL_FATAL, "Optimization level must be between 0 and 3");
       OptLevel = opt[1] - '0';
     } else if (opt.startswith("jobs=")) {
       if (StringRef(opt_ + 5).getAsInteger(10, Parallelism))
         message(LDPL_FATAL, "Invalid parallelism level: %s", opt_ + 5);
     } else if (opt == "disable-verify") {
for (auto &Task : Tasks)
     Task.cleanup();
 }
 
 /// Parse the thinlto_prefix_replace option into the \p OldPrefix and
 /// \p NewPrefix strings, if it was specified.
 static void getThinLTOOldAndNewPrefix(std::string &OldPrefix,
                                       std::string &NewPrefix) {
   StringRef PrefixReplace = options::thinlto_prefix_replace;
-  assert(PrefixReplace.empty() || PrefixReplace.find(":") != StringRef::npos);
-  std::pair<StringRef, StringRef> Split = PrefixReplace.split(":");
+  assert(PrefixReplace.empty() || PrefixReplace.find(";") != StringRef::npos);
+  std::pair<StringRef, StringRef> Split = PrefixReplace.split(";");
   OldPrefix = Split.first.str();
   NewPrefix = Split.second.str();
 }
 
 /// Given the original \p Path to an output file, replace any path
 /// prefix matching \p OldPrefix with \p NewPrefix. Also, create the
 /// resulting directory if it does not yet exist.
 static std::string getThinLTOOutputFile(const std::string &Path,

tools/llvm-lto/llvm-lto.cpp

 static cl::opt<std::string>
     ThinLTOIndex("thinlto-index",
                  cl::desc("Provide the index produced by a ThinLink, required "
                           "to perform the promotion and/or importing."));
 
 static cl::opt<std::string> ThinLTOPrefixReplace(
     "thinlto-prefix-replace",
     cl::desc("Control where files for distributed backends are "
-             "created. Expects 'oldprefix:newprefix' and if path "
+             "created. Expects 'oldprefix;newprefix' and if path "
              "prefix of output file is oldprefix it will be "
              "replaced with newprefix."));
 
 static cl::opt<std::string> ThinLTOModuleId(
     "thinlto-module-id",
     cl::desc("For the module ID for the file to process, useful to "
              "match what is in the index."));
 
static void createCombinedModuleSummaryIndex() {
   OS.close();
 }
 
 /// Parse the thinlto_prefix_replace option into the \p OldPrefix and
 /// \p NewPrefix strings, if it was specified.
 static void getThinLTOOldAndNewPrefix(std::string &OldPrefix,
                                       std::string &NewPrefix) {
   assert(ThinLTOPrefixReplace.empty() ||
-         ThinLTOPrefixReplace.find(":") != StringRef::npos);
+         ThinLTOPrefixReplace.find(";") != StringRef::npos);
   StringRef PrefixReplace = ThinLTOPrefixReplace;
-  std::pair<StringRef, StringRef> Split = PrefixReplace.split(":");
+  std::pair<StringRef, StringRef> Split = PrefixReplace.split(";");
   OldPrefix = Split.first.str();
   NewPrefix = Split.second.str();
 }
 
 /// Given the original \p Path to an output file, replace any path
 /// prefix matching \p OldPrefix with \p NewPrefix. Also, create the
 /// resulting directory if it does not yet exist.
 static std::string getThinLTOOutputFile(const std::string &Path,