[clang] [clang-scan-deps] Don't inspect Args[0] as an option (PR #109050)

[Jan Svoboda via cfe-commits]

================
@@ -839,9 +839,11 @@ int clang_scan_deps_main(int argc, char **argv, const 
llvm::ToolContext &) {
           auto R = std::make_reverse_iterator(FlagsEnd);
           for (auto I = R, E = Args.rend(); I != E; ++I) {
             StringRef Arg = *I;
+            if ((I + 1) == E) // Don't inspect Args[0] as an option.
+              break;
----------------
jansvoboda11 wrote:

Why not adjust `E` in the loop header instead of checking this on each 
iteration?

https://github.com/llvm/llvm-project/pull/109050
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