[llc] Report error in lieu of warning for invalid cl option (#128846)

Author: optimisan

llvm/test/tools/llc/new-pm/option-conflict.ll

@@ -1,3 +1,3 @@
 ; RUN: not llc -mtriple=x86_64-pc-linux-gnu -passes=foo -start-before=mergeicmps -stop-after=gc-lowering -filetype=null %s 2>&1 | FileCheck  %s
 
-; CHECK: warning: --passes cannot be used with start-before and stop-after.
+; CHECK: error: --passes cannot be used with start-before and stop-after.

llvm/tools/llc/NewPMDriver.cpp

@@ -93,7 +93,7 @@ int llvm::compileModuleWithNewPM(
     CodeGenFileType FileType) {
 
   if (!PassPipeline.empty() && TargetPassConfig::hasLimitedCodeGenPipeline()) {
-    WithColor::warning(errs(), Arg0)
+    WithColor::error(errs(), Arg0)
         << "--passes cannot be used with "
         << TargetPassConfig::getLimitedCodeGenPipelineReason() << ".\n";
     return 1;
@@ -139,7 +139,7 @@ int llvm::compileModuleWithNewPM(
     // selection.
 
     if (!MIR) {
-      WithColor::warning(errs(), Arg0) << "-passes is for .mir file only.\n";
+      WithColor::error(errs(), Arg0) << "-passes is for .mir file only.\n";
       return 1;
     }
 

llvm/tools/llc/llc.cpp

@@ -678,15 +678,15 @@ static int compileModule(char **argv, LLVMContext &Context) {
     // selection.
     if (!getRunPassNames().empty()) {
       if (!MIR) {
-        WithColor::warning(errs(), argv[0])
+        WithColor::error(errs(), argv[0])
             << "run-pass is for .mir file only.\n";
         delete MMIWP;
         return 1;
       }
       TargetPassConfig *PTPC = Target->createPassConfig(PM);
       TargetPassConfig &TPC = *PTPC;
       if (TPC.hasLimitedCodeGenPipeline()) {
-        WithColor::warning(errs(), argv[0])
+        WithColor::error(errs(), argv[0])
             << "run-pass cannot be used with "
             << TPC.getLimitedCodeGenPipelineReason() << ".\n";
         delete PTPC;