[Mlir-commits] [mlir] [mlir][ArmSME] Support 4-way widening outer products (PR #79288)

[Cullen Rhodes]

================
@@ -31,6 +31,55 @@ using namespace mlir;
 using namespace mlir::arm_sme;
 
 namespace {
+
+// Common match failure reasons.
+static constexpr StringLiteral
+    MATCH_FAILURE_NO_ACCUMULATOR("no accumulator operand");
----------------
c-rhodes wrote:

hm not sure, I copied this idea from the type legalization, constants are sometimes upper case but grepping around I can't find any examples and that doc you linked doesn't mention constants AFAICT, will change to camel case.

https://github.com/llvm/llvm-project/pull/79288