[mlir] Fix Analysis/Presburger/Utils.cpp compilation with GCC 11

[ro]

Summary

As reported in Issue #56850, mlir/lib/Analysis/Presburger/Utils.cpp doesn't compile on Solaris 11.4/SPARC with the bundled GCC 11, as seen when testing LLVM 15.0.0 rc1:

/var/llvm/reltest/llvm-15.0.0-rc1/rc1/llvm-project/mlir/include/mlir/Analysis/Presburger/MPInt.h:260:47: error: inlining failed in call to ‘always_inline’ ‘int64_t mlir::presburger::int64FromMPInt(const mlir::presburger::MPInt&)’: indirect function call with a yet undetermined callee

This patch hacks around this and allowed the build to finish.

Tested on sparcv9-sun-solaris2.11.

[arjunp]

Please clang-format before landing.

mlir/include/mlir/Analysis/Presburger/MPInt.h

 
 /// Redeclarations of friend declaration above to
 /// make it discoverable by lookups.
 llvm::hash_code hash_value(const MPInt &x); // NOLINT
 
 /// This just calls through to the operator int64_t, but it's useful when a
 /// function pointer is required. (Although this is marked inline, it is still
 /// possible to obtain and use a function pointer to this.)
-LLVM_ATTRIBUTE_ALWAYS_INLINE int64_t int64FromMPInt(const MPInt &x) {
-  return int64_t(x);
-}
+static inline int64_t int64FromMPInt(const MPInt &x) { return int64_t(x); }
 LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt mpintFromInt64(int64_t x) {
   return MPInt(x);
 }
 
 llvm::raw_ostream &operator<<(llvm::raw_ostream &os, const MPInt &x);
 
 // The RHS is always expected to be positive, and the result
 /// is always non-negative.