TableGen: Handle nontrivial foreach range bounds
This allows using anything that isn't a literal integer as the bounds
for a foreach. Some of the diagnostics aren't perfect, but nobody ever
accused tablegen of having good errors. For example, the existing
wording suggests a bitrange is valid, but as far as I can tell this
has never worked.
Fixes bug 41958.
llvm-svn: 361434
diff --git a/llvm/test/TableGen/foreach-range-parse-errors2.td b/llvm/test/TableGen/foreach-range-parse-errors2.td
new file mode 100644
index 0000000..7717c10
--- /dev/null
+++ b/llvm/test/TableGen/foreach-range-parse-errors2.td
@@ -0,0 +1,13 @@
+// RUN: not llvm-tblgen %s 2>&1 | FileCheck -DFILE=%s %s
+
+class ConstantsImpl {
+ int NegOne = -1;
+}
+
+def Constants : ConstantsImpl;
+
+// CHECK: [[FILE]]:[[@LINE+2]]:38: error: invalid range, cannot be negative
+// CHECK: [[FILE]]:[[@LINE+1]]:38: error: expected declaration in for
+foreach Index = 0 - Constants.NegOne in {
+
+}