[clang] [CIR] Implement support for MatrixSingleSubstract expr (PR #232079)

[Erich Keane via cfe-commits]

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@@ -6636,22 +6635,25 @@ def CIR_MatrixExtractOp : CIR_Op<"matrix.extract", [
     ```
     %rowIdx = cir.const #cir.int<1> : !u64i
     %columnIdx = cir.const #cir.int<2> : !u64i
-    %element = cir.matrix.extract %matrix[%rowIdx : !u64i] [%columnIdx : !u64i] 
+    %row = cir.matrix.extract %matrix[%rowIdx : !s32i] 
+      : !cir.matrix<3 x 3 x !cir.float>
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erichkeane wrote:

Perhaps we should be printing the return type now, since it isn't consistently the element type. 

https://github.com/llvm/llvm-project/pull/232079