[Polly][Isl] Removing explicit operator bool() from isl C++ bindings. NFC.

This is part of an effort to reduce the differences between the custom C++ bindings used right now by polly in `lib/External/isl/include/isl/isl-noxceptions.h` and the official isl C++ interface.

Changes made:
 - Removing explicit operator bool() from all the classes in the isl C++ bindings.
 - Replace each call to operator bool() to method `is_null()`.
 - isl-noexceptions.h has been generated by this https://github.com/patacca/isl/commit/27396daac5a5ee8228d25511a12f4a814c92ba8f

Reviewed By: Meinersbur

Differential Revision: https://reviews.llvm.org/D103976

1 files changed, 17 insertions, 17 deletions

diff --git a/polly/unittests/DeLICM/DeLICMTest.cpp b/polly/unittests/DeLICM/DeLICMTest.cpp
index eaa37ee2376e..64318a4bc0d9 100644
--- a/polly/unittests/DeLICM/DeLICMTest.cpp
+++ b/polly/unittests/DeLICM/DeLICMTest.cpp
@@ -37,17 +37,17 @@ void completeLifetime(isl::union_set Universe, isl::union_map OccupiedAndKnown,
                       isl::union_set &Undef) {
   auto ParamSpace = Universe.get_space();
 
-  if (Undef && !Occupied) {
-    assert(!Occupied);
+  if (!Undef.is_null() && Occupied.is_null()) {
+    assert(Occupied.is_null());
     Occupied = Universe.subtract(Undef);
   }
 
-  if (OccupiedAndKnown) {
-    assert(!Known);
+  if (!OccupiedAndKnown.is_null()) {
+    assert(Known.is_null());
 
     Known = isl::union_map::empty(ParamSpace);
 
-    if (!Occupied)
+    if (Occupied.is_null())
       Occupied = OccupiedAndKnown.domain();
 
     for (isl::map Map : OccupiedAndKnown.get_map_list()) {
@@ -57,19 +57,19 @@ void completeLifetime(isl::union_set Universe, isl::union_map OccupiedAndKnown,
     }
   }
 
-  if (!Undef) {
-    assert(Occupied);
+  if (Undef.is_null()) {
+    assert(!Occupied.is_null());
     Undef = Universe.subtract(Occupied);
   }
 
-  if (!Known) { // By default, nothing is known.
+  if (Known.is_null()) { // By default, nothing is known.
     Known = isl::union_map::empty(ParamSpace);
   }
 
   // Conditions that must hold when returning.
-  assert(Occupied);
-  assert(Undef);
-  assert(Known);
+  assert(!Occupied.is_null());
+  assert(!Undef.is_null());
+  assert(!Known.is_null());
 }
 
 typedef struct {
@@ -97,17 +97,17 @@ bool checkIsConflictingNonsymmetricCommon(
     isl::union_map ProposedWritten) {
   // Determine universe (set of all possible domains).
   auto Universe = isl::union_set::empty(isl::space::params_alloc(Ctx, 0));
-  if (ExistingOccupiedAndKnown)
+  if (!ExistingOccupiedAndKnown.is_null())
     Universe = Universe.unite(ExistingOccupiedAndKnown.domain());
-  if (ExistingUnused)
+  if (!ExistingUnused.is_null())
     Universe = Universe.unite(ExistingUnused);
-  if (ExistingWritten)
+  if (!ExistingWritten.is_null())
     Universe = Universe.unite(ExistingWritten.domain());
-  if (ProposedOccupiedAndKnown)
+  if (!ProposedOccupiedAndKnown.is_null())
     Universe = Universe.unite(ProposedOccupiedAndKnown.domain());
-  if (ProposedUnused)
+  if (!ProposedUnused.is_null())
     Universe = Universe.unite(ProposedUnused);
-  if (ProposedWritten)
+  if (!ProposedWritten.is_null())
     Universe = Universe.unite(ProposedWritten.domain());
 
   Universe = unionSpace(Universe);