[mlir] Skip invalid test on big endian platform (s390x) (#80246)

The buildbot test running on s390x platform keeps failing since [this
time](https://lab.llvm.org/buildbot/#/builders/199/builds/31136). This
is because of the dependency on the endianness of the platform. It
expects the format invalid in the big endian platform (s390x). We can
simply skip it.

See: https://discourse.llvm.org/t/mlir-s390x-linux-failure/76695

Author: Lewuathe

mlir/test/Target/LLVMIR/llvmir-le-specific.mlir

@@ -0,0 +1,27 @@
+// RUN: mlir-translate -mlir-to-llvmir -split-input-file %s | FileCheck %s
+
+// Decoding the attribute does not work on big-endian platforms currently
+// XFAIL: target=s390x-{{.*}}
+
+// CHECK{LITERAL}: @dense_resource_tensor_constant = internal constant [5 x float] [float 0x3FCA034080000000, float 0xBFD0466300000000, float 0xBFD75DDF80000000, float 0xBFDE074F40000000, float 0x3FDDD3A1C0000000]
+llvm.mlir.global internal constant @dense_resource_tensor_constant(dense_resource<dense_resource_test_5xf32> : tensor<5xf32>) : !llvm.array<5 x f32>
+
+// CHECK{LITERAL}: @dense_resource_vector_constant = internal constant <5 x float> <float 0x3FCA034080000000, float 0xBFD0466300000000, float 0xBFD75DDF80000000, float 0xBFDE074F40000000, float 0x3FDDD3A1C0000000>
+llvm.mlir.global internal constant @dense_resource_vector_constant(dense_resource<dense_resource_test_5xf32> : vector<5xf32>) : vector<5xf32>
+
+
+// CHECK{LITERAL}: @dense_resource_multidim_tensor_constant = internal constant [1 x [2 x [2 x float]]] [[2 x [2 x float]] [[2 x float] [float 0x3FD6B46A80000000, float 0x3FD6781AC0000000], [2 x float] [float 0xBFB45A2AA0000000, float 0x3FD77A5CA0000000]]]
+llvm.mlir.global internal constant @dense_resource_multidim_tensor_constant(dense_resource<dense_resource_test_2x2xf32> : tensor<1x2x2xf32>) : !llvm.array<1 x !llvm.array<2 x !llvm.array<2 x f32>>>
+
+// CHECK{LITERAL}: @dense_resource_multidim_vector_constant = internal constant [1 x [2 x <2 x float>]] [[2 x <2 x float>] [<2 x float> <float 0x3FD6B46A80000000, float 0x3FD6781AC0000000>, <2 x float> <float 0xBFB45A2AA0000000, float 0x3FD77A5CA0000000>]]
+llvm.mlir.global internal constant @dense_resource_multidim_vector_constant(dense_resource<dense_resource_test_2x2xf32> : vector<1x2x2xf32>) : !llvm.array<1 x !llvm.array<2 x vector<2 x f32>>>
+
+// Resources are kept at end of file. New tests should be added above this.
+{-#
+  dialect_resources: {
+    builtin: {
+      dense_resource_test_5xf32: "0x08000000041A503E183382BEFCEEBABE7A3AF0BE0E9DEE3E",
+      dense_resource_test_2x2xf32: "0x0800000054A3B53ED6C0B33E55D1A2BDE5D2BB3E"
+    }
+  }
+#-}

mlir/test/Target/LLVMIR/llvmir.mlir

@@ -101,19 +101,6 @@ llvm.mlir.global internal @dense_float_vector_3d(dense<[[[1.0, 2.0], [3.0, 4.0]]
 // CHECK{LITERAL}: @splat_float_vector_3d = internal global [2 x [2 x <2 x float>]] [[2 x <2 x float>] [<2 x float> <float 4.200000e+01, float 4.200000e+01>, <2 x float> <float 4.200000e+01, float 4.200000e+01>], [2 x <2 x float>] [<2 x float> <float 4.200000e+01, float 4.200000e+01>, <2 x float> <float 4.200000e+01, float 4.200000e+01>]]
 llvm.mlir.global internal @splat_float_vector_3d(dense<42.0> : vector<2x2x2xf32>) : !llvm.array<2 x !llvm.array<2 x vector<2xf32>>>
 
-// CHECK{LITERAL}: @dense_resource_tensor_constant = internal constant [5 x float] [float 0x3FCA034080000000, float 0xBFD0466300000000, float 0xBFD75DDF80000000, float 0xBFDE074F40000000, float 0x3FDDD3A1C0000000]
-llvm.mlir.global internal constant @dense_resource_tensor_constant(dense_resource<dense_resource_test_5xf32> : tensor<5xf32>) : !llvm.array<5 x f32>
-
-// CHECK{LITERAL}: @dense_resource_vector_constant = internal constant <5 x float> <float 0x3FCA034080000000, float 0xBFD0466300000000, float 0xBFD75DDF80000000, float 0xBFDE074F40000000, float 0x3FDDD3A1C0000000>
-llvm.mlir.global internal constant @dense_resource_vector_constant(dense_resource<dense_resource_test_5xf32> : vector<5xf32>) : vector<5xf32>
-
-
-// CHECK{LITERAL}: @dense_resource_multidim_tensor_constant = internal constant [1 x [2 x [2 x float]]] [[2 x [2 x float]] [[2 x float] [float 0x3FD6B46A80000000, float 0x3FD6781AC0000000], [2 x float] [float 0xBFB45A2AA0000000, float 0x3FD77A5CA0000000]]]
-llvm.mlir.global internal constant @dense_resource_multidim_tensor_constant(dense_resource<dense_resource_test_2x2xf32> : tensor<1x2x2xf32>) : !llvm.array<1 x !llvm.array<2 x !llvm.array<2 x f32>>>
-
-// CHECK{LITERAL}: @dense_resource_multidim_vector_constant = internal constant [1 x [2 x <2 x float>]] [[2 x <2 x float>] [<2 x float> <float 0x3FD6B46A80000000, float 0x3FD6781AC0000000>, <2 x float> <float 0xBFB45A2AA0000000, float 0x3FD77A5CA0000000>]]
-llvm.mlir.global internal constant @dense_resource_multidim_vector_constant(dense_resource<dense_resource_test_2x2xf32> : vector<1x2x2xf32>) : !llvm.array<1 x !llvm.array<2 x vector<2 x f32>>>
-
 //
 // Linkage attribute.
 //
@@ -1590,16 +1577,6 @@ llvm.func @invokeLandingpad() -> i32 attributes { personality = @__gxx_personali
   llvm.invoke %9(%6, %0) to ^bb2 unwind ^bb1 vararg(!llvm.func<void (ptr, ...)>) : !llvm.ptr, (!llvm.ptr, i32) -> ()
 }
 
-// Resources are kept at end of file. New tests should be added above this.
-{-#
-  dialect_resources: {
-    builtin: {
-      dense_resource_test_5xf32: "0x08000000041A503E183382BEFCEEBABE7A3AF0BE0E9DEE3E",
-      dense_resource_test_2x2xf32: "0x0800000054A3B53ED6C0B33E55D1A2BDE5D2BB3E"
-    }
-  }
-#-}
-
 // -----
 
 llvm.func @foo() -> i8