[NFC][SpecialCaseList] Make default version 2 instead of max()

[vitalybuka]

This way we can roll out new breaking features as opt-int.
E.g. "#!special-case-list-v3" will enabled something new.

Nothing to enabled yet, but with pinpointed default it's an option.

Follow up #162350.

[llvmbot]

@llvm/pr-subscribers-llvm-support

Author: Vitaly Buka (vitalybuka)

Changes

This way we can roll out new breaking features as opt-int.
E.g. "#!special-case-list-v3" will enabled something new.

Nothing to enabled yet, but with pinpointed default it's an option.

---

Full diff: https://github.com/llvm/llvm-project/pull/162398.diff

1 Files Affected:

• (modified) llvm/lib/Support/SpecialCaseList.cpp (+1-1)

diff --git a/llvm/lib/Support/SpecialCaseList.cpp b/llvm/lib/Support/SpecialCaseList.cpp
index c0bfeb4020872..f18cc391c6998 100644
--- a/llvm/lib/Support/SpecialCaseList.cpp
+++ b/llvm/lib/Support/SpecialCaseList.cpp
@@ -150,7 +150,7 @@ SpecialCaseList::addSection(StringRef SectionStr, unsigned FileNo,
 
 bool SpecialCaseList::parse(unsigned FileIdx, const MemoryBuffer *MB,
                             std::string &Error) {
-  unsigned long long Version = std::numeric_limits<unsigned long long>::max();
+  unsigned long long Version = 2;
 
   StringRef Header = MB->getBuffer();
   if (Header.consume_front("#!special-case-list-v"))