[llvm] Make clang report garbage target versions. (PR #75373)

[via llvm-commits]

https://github.com/ZijunZhaoCCK created https://github.com/llvm/llvm-project/pull/75373

Clang always silently ignores garbage target versions and this makes debug harder. So clang will report when target versions are invalid.

>From 74f256d8a77ee2ba8e0d5bbb6519aa2729cf94d5 Mon Sep 17 00:00:00 2001
From: zijunzhao <zijunzhao at google.com>
Date: Wed, 13 Dec 2023 20:07:45 +0000
Subject: [PATCH] Make clang report garbage target versions.

Clang always silently ignores garbage target versions and this makes
debug harder. So clang will report when target versions are invalid.
---
 llvm/lib/TargetParser/Triple.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/TargetParser/Triple.cpp b/llvm/lib/TargetParser/Triple.cpp
index c5e9ad43d22588..335253194d1cf8 100644
--- a/llvm/lib/TargetParser/Triple.cpp
+++ b/llvm/lib/TargetParser/Triple.cpp
@@ -11,6 +11,7 @@
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/SwapByteOrder.h"
 #include "llvm/Support/VersionTuple.h"
 #include "llvm/TargetParser/ARMTargetParser.h"
@@ -1199,7 +1200,11 @@ StringRef Triple::getOSAndEnvironmentName() const {
 
 static VersionTuple parseVersionFromName(StringRef Name) {
   VersionTuple Version;
-  Version.tryParse(Name);
+  if (Version.tryParse(Name)) {
+    errs() << "The input is "<< Name << " and it is invalid. Should pass an "<<
+    "integer or integer combination! e.g. 2, 9.5 or 3.4.5\n";
+    exit(1);
+  }
   return Version.withoutBuild();
 }