Ensure the correct function is called by appending std:: to the std math functions

Author: AZero13

lib/Sema/CSSimplify.cpp

@@ -13974,7 +13974,7 @@ ConstraintSystem::simplifyRestrictedConstraintImpl(
     // before matching base types if other side is an optional, so
     // score needs to account for number of such promotions.
     int optionalWraps = baseType2.getInt() - baseType1.getInt();
-    return recordFix(fix, baseImpact + abs(optionalWraps))
+    return recordFix(fix, baseImpact + std::abs(optionalWraps))
                ? SolutionKind::Error
                : SolutionKind::Solved;
   };

lib/Sema/ConstraintSystem.cpp

@@ -80,7 +80,7 @@ ExpressionTimer::~ExpressionTimer() {
 
   if (PrintDebugTiming) {
     // Round up to the nearest 100th of a millisecond.
-    llvm::errs() << llvm::format("%0.2f", ceil(elapsed * 100000) / 100)
+    llvm::errs() << llvm::format("%0.2f", std::ceil(elapsed * 100000) / 100)
                  << "ms\t";
     if (auto *E = Anchor.dyn_cast<Expr *>()) {
       E->getLoc().print(llvm::errs(), Context.SourceMgr);

lib/Sema/TypeCheckStmt.cpp

@@ -172,7 +172,7 @@ namespace {
 
       if (ctx.TypeCheckerOpts.DebugTimeFunctionBodies) {
         // Round up to the nearest 100th of a millisecond.
-        llvm::errs() << llvm::format("%0.2f", ceil(elapsed * 100000) / 100) << "ms\t";
+        llvm::errs() << llvm::format("%0.2f", std::ceil(elapsed * 100000) / 100) << "ms\t";
         Function.getLoc().print(llvm::errs(), ctx.SourceMgr);
 
         if (AFD) {