[c++20] P0515R3: Parsing support and basic AST construction for operator <=>.

Adding the new enumerator forced a bunch more changes into this patch than I
would have liked. The -Wtautological-compare warning was extended to properly
check the new comparison operator, clang-format needed updating because it uses
precedence levels as weights for determining where to break lines (and several
operators increased their precedence levels with this change), thread-safety
analysis needed changes to build its own IL properly for the new operator.

All "real" semantic checking for this operator has been deferred to a future
patch. For now, we use the relational comparison rules and arbitrarily give
the builtin form of the operator a return type of 'void'.

llvm-svn: 320707

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/StaticAnalyzer/Core/RangedConstraintManager.cpp b/clang/lib/StaticAnalyzer/Core/RangedConstraintManager.cpp
index 1304116f497..55ff15806ef 100644
--- a/clang/lib/StaticAnalyzer/Core/RangedConstraintManager.cpp
+++ b/clang/lib/StaticAnalyzer/Core/RangedConstraintManager.cpp
@@ -33,7 +33,7 @@ ProgramStateRef RangedConstraintManager::assumeSym(ProgramStateRef State,
     // We can only simplify expressions whose RHS is an integer.
 
     BinaryOperator::Opcode op = SIE->getOpcode();
-    if (BinaryOperator::isComparisonOp(op)) {
+    if (BinaryOperator::isComparisonOp(op) && op != BO_Cmp) {
       if (!Assumption)
         op = BinaryOperator::negateComparisonOp(op);