[dwarfdump] Make incompatibility between -diff and -verbose explicit.

Using -diff and -verbose together doesn't work today. We should audit
where these two options interact and fix them. In the meantime we error
out when the user try to specify both.

llvm-svn: 345084

1 files changed, 9 insertions, 1 deletions

diff --git a/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp b/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
index af21a41..0ed8696 100644
--- a/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
+++ b/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
@@ -226,7 +226,7 @@ static alias VerboseAlias("v", desc("Alias for -verbose."), aliasopt(Verbose),
 static void error(StringRef Prefix, std::error_code EC) {
   if (!EC)
     return;
-  errs() << Prefix << ": " << EC.message() << "\n";
+  WithColor::error() << Prefix << ": " << EC.message() << "\n";
   exit(1);
 }
 
@@ -571,6 +571,14 @@ int main(int argc, char **argv) {
     return 0;
   }
 
+  // FIXME: Audit interactions between these two options and make them
+  //        compatible.
+  if (Diff && Verbose) {
+    WithColor::error() << "incompatible arguments: specifying both -diff and "
+                          "-verbose is currently not supported";
+    return 0;
+  }
+
   std::unique_ptr<ToolOutputFile> OutputFile;
   if (!OutputFilename.empty()) {
     std::error_code EC;