Optimizer: Do not accidentally set schedule to NULL
In case the domain of a statement is empty, the schedule optimizer set by
accident the schedule to a NULL pointer. This is incorrect. Instead, we set
it to an empty isl_map with zero schedule dimensions. We already checked for
this in our test cases, but unfortunately the test cases did not fail as
expected. The assert we add in this commit now ensures that the test cases
fail properly in case we regress on this again.
llvm-svn: 201886
diff --git a/polly/lib/Analysis/ScopInfo.cpp b/polly/lib/Analysis/ScopInfo.cpp
index 86b4762..e0f8573 100644
--- a/polly/lib/Analysis/ScopInfo.cpp
+++ b/polly/lib/Analysis/ScopInfo.cpp
@@ -500,6 +500,7 @@
}
void ScopStmt::setScattering(isl_map *NewScattering) {
+ assert(NewScattering && "New scattering is NULL");
isl_map_free(Scattering);
Scattering = NewScattering;
}