================
@@ -0,0 +1,72 @@
+// clang/test/SemaOpenCL/coop-mat-sema-neg.cl
+//
+// Patch 4: Sema — negative tests for diagnostic paths.
+//
+// RUN: %clang_cc1 -triple spirv64-unknown-unknown \
+// RUN: -cl-std=CL2.0 -cl-ext=+cl_khr_cooperative_matrix \
+// RUN: -finclude-default-header -fsyntax-only -verify %s
+
+#define SCOPE memory_scope_sub_group
+#define USE_A CLK_COOPERATIVE_MATRIX_A
+#define USE_B CLK_COOPERATIVE_MATRIX_B
+#define USE_C CLK_COOPERATIVE_MATRIX_ACCUMULATOR
+#define ROW_MAJOR CLK_COOPERATIVE_MATRIX_LAYOUT_ROW_MAJOR
+
+// ---------------------------------------------------------------------------
+// 0. Use of coop mat type without specifying pragma
+// ---------------------------------------------------------------------------
+typedef float __attribute__((coop_mat(SCOPE, 16, 16, USE_A))) MatX_t; //
expected-error {{cooperative matrix types require OpenCL extension
'cl_khr_cooperative_matrix' to be enabled via pragma}}
+
+#pragma OPENCL EXTENSION cl_khr_cooperative_matrix : enable
+
+typedef float __attribute__((coop_mat(SCOPE, 16, 16, USE_A))) MatA_t; //
expected-note {{declared here}}
+typedef float __attribute__((coop_mat(SCOPE, 16, 16, USE_B))) MatB_t;
+typedef int __attribute__((coop_mat(SCOPE, 16, 16, USE_C))) MatC_int_t;
+
+// ---------------------------------------------------------------------------
+// 1. Invalid scope value (0 is not memory_scope_sub_group)
+// ---------------------------------------------------------------------------
+typedef float __attribute__((coop_mat(0, 16, 16, USE_A))) MatBadScope; //
expected-error {{invalid argument of cooperative matrix attribute}}
+
+// ---------------------------------------------------------------------------
+// 2. Invalid use value (99 is not 0/1/2)
+// ---------------------------------------------------------------------------
+typedef float __attribute__((coop_mat(SCOPE, 16, 16, 99))) MatBadUse; //
expected-error {{invalid argument of cooperative matrix attribute}}
+
+// ---------------------------------------------------------------------------
+// 3. Mismatched element types in coop_mat_mulAdd
+// a/b are float matrices, c is an int matrix — should fire element type
+// mismatch diagnostic.
+// Use the two-step declare-then-assign pattern so that the coop_mat_load
----------------
asudarsa-qti wrote:
With my latest changes, MatA_t a = coop_mat_load(,.....) works!.
I will add this to coop-mat-sema.cl
https://github.com/llvm/llvm-project/pull/221328
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