[ForwardOpTree] Test the max operations quota.
cl::opt<unsigned long> is not specialized and hence the option
-polly-optree-max-ops impossible to use.
Replace by supported option cl::opt<unsigned>.
Also check for an error state when computing the written value, which
happens when the quota runs out.
llvm-svn: 313546
diff --git a/polly/lib/Transform/ForwardOpTree.cpp b/polly/lib/Transform/ForwardOpTree.cpp
index 733b4d6..6a68581 100644
--- a/polly/lib/Transform/ForwardOpTree.cpp
+++ b/polly/lib/Transform/ForwardOpTree.cpp
@@ -51,7 +51,7 @@
cl::desc("Analyze array contents for load forwarding"),
cl::cat(PollyCategory), cl::init(true), cl::Hidden);
-static cl::opt<unsigned long>
+static cl::opt<unsigned>
MaxOps("polly-optree-max-ops",
cl::desc("Maximum number of ISL operations to invest for known "
"analysis; 0=no limit"),