[DWP] Fix default for continue-on-cu-index-overflow (#75540)

This is follow up for https://github.com/llvm/llvm-project/pull/71902.
The
default option --continue-on-cu-index-overflow returned an error
--continue-on-cu-index-overflow: missing argument. Changed it so that it
is the
same behavior as other flags like -gsplit-dwarf. Where
--continue-on-cu-index-overflow will default to continue, and user can
set mode
with --continue-on-cu-index-overflow=\<value>.

1 files changed, 14 insertions, 6 deletions

diff --git a/llvm/tools/llvm-dwp/llvm-dwp.cpp b/llvm/tools/llvm-dwp/llvm-dwp.cpp
index 5cd4c00..a6b8643 100644
--- a/llvm/tools/llvm-dwp/llvm-dwp.cpp
+++ b/llvm/tools/llvm-dwp/llvm-dwp.cpp
@@ -144,13 +144,21 @@ int llvm_dwp_main(int argc, char **argv, const llvm::ToolContext &) {
   }
 
   OutputFilename = Args.getLastArgValue(OPT_outputFileName, "");
-  if (Args.hasArg(OPT_continueOnCuIndexOverflow)) {
-    ContinueOption =
-        Args.getLastArgValue(OPT_continueOnCuIndexOverflow, "continue");
-    if (ContinueOption == "soft-stop") {
-      OverflowOptValue = OnCuIndexOverflow::SoftStop;
-    } else {
+  if (Arg *Arg = Args.getLastArg(OPT_continueOnCuIndexOverflow,
+                                 OPT_continueOnCuIndexOverflow_EQ)) {
+    if (Arg->getOption().matches(OPT_continueOnCuIndexOverflow)) {
       OverflowOptValue = OnCuIndexOverflow::Continue;
+    } else {
+      ContinueOption = Arg->getValue();
+      if (ContinueOption == "soft-stop") {
+        OverflowOptValue = OnCuIndexOverflow::SoftStop;
+      } else if (ContinueOption == "continue") {
+        OverflowOptValue = OnCuIndexOverflow::Continue;
+      } else {
+        llvm::errs() << "invalid value for --continue-on-cu-index-overflow"
+                     << ContinueOption << '\n';
+        exit(1);
+      }
     }
   }