================
@@ -0,0 +1,72 @@
+// This test checks that "update to" clause in OpenMP is supported when the
+// elements are updated in a non-contiguous manner. This test checks that
+// #pragma omp target update to(data[0:4:2]) correctly updates only every
+// other element (stride 2) from the host to the device
+
+// RUN: %libomptarget-compile-run-and-check-generic
+#include <omp.h>
+#include <stdio.h>
+
+int main() {
+ int len = 8;
+ double data[len];
+
+ // Initialize on host
+ for (int i = 0; i < len; i++) {
+ data[i] = i;
+ }
+
+ // Initial values
+ printf("original host array values:\n");
+ for (int i = 0; i < len; i++)
+ printf("%f\n", data[i]);
+ printf("\n");
+
+#pragma omp target data map(tofrom : len, data[0 : len])
+ {
+ // Initialize device to 20
+#pragma omp target
+ for (int i = 0; i < len; i++) {
+ data[i] = 20.0;
+ }
+
+ // Modify host for strided elements
+ data[0] = 10.0;
+ data[2] = 10.0;
+ data[4] = 10.0;
+ data[6] = 10.0;
+
+#pragma omp target update to(data[0 : 4 : 2])
+
+ // Verify on device by adding 5
+#pragma omp target
+ for (int i = 0; i < len; i++) {
+ data[i] += 5.0;
+ }
+ }
+
+ // CHECK: 0.000000
+ // CHECK: 1.000000
+ // CHECK: 2.000000
+ // CHECK: 3.000000
+ // CHECK: 4.000000
+ // CHECK: 5.000000
+ // CHECK: 6.000000
+ // CHECK: 7.000000
+
+ printf("device array values after update to:\n");
+ for (int i = 0; i < len; i++)
+ printf("%f\n", data[i]);
+ printf("\n");
+
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+
+ return 0;
+}
----------------
shiltian wrote:
and miss one empty line here
https://github.com/llvm/llvm-project/pull/169623
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