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-rw-r--r--mlir/lib/IR/StandardTypes.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/mlir/lib/IR/StandardTypes.cpp b/mlir/lib/IR/StandardTypes.cpp
index c14a6b8978d..036fd09f410 100644
--- a/mlir/lib/IR/StandardTypes.cpp
+++ b/mlir/lib/IR/StandardTypes.cpp
@@ -31,6 +31,9 @@ using namespace mlir::detail;
// Integer Type
//===----------------------------------------------------------------------===//
+// static constexpr must have a definition (until in C++17 and inline variable).
+constexpr unsigned IntegerType::kMaxWidth;
+
/// Verify the construction of an integer type.
LogicalResult IntegerType::verifyConstructionInvariants(
llvm::Optional<Location> loc, MLIRContext *context, unsigned width) {
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