Annotate scaled matmul dispatch

[Yu-Zhewen]

Currently, only regular matmul is handled, and scaled matmul operations are instead classified as “reduction” dispatches.

iree/compiler/src/iree/compiler/Dialect/Flow/Transforms/AnnotateDispatches.cpp

Lines 296 to 305 in 39a15a7

	} else if (isMatmulLike(op)) {
	prefix = "matmul_like";
	} else if (linalg::isaContractionOpInterface(op)) {
	prefix = "contract";
	} else if (IREE::LinalgExt::isaHorizontallyFusedContraction(op)) {
	prefix = "horizontal_multi_contract";
	} else if (succeeded(linalg::inferConvolutionDims(op))) {
	prefix = "conv";
	} else if (op.getNumReductionLoops()) {
	prefix = "reduction";