bug-tested

Author: amitamd7

offload/test/offloading/strided_update.c

@@ -0,0 +1,51 @@
+// Checks that "update from" clause in OpenMP is supported when the elements are updated in a non-contiguous manner.
+// RUN: %libomptarget-compile-run-and-check-generic
+#include <omp.h>  
+#include <stdio.h>  
+  
+int main() {  
+  int len = 8;  
+  double data[len];  
+  #pragma omp target map(tofrom: len, data[0:len])  
+  {  
+    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(to: len, data[0:len])  
+  {  
+    #pragma omp target  
+    for (int i = 0; i < len; i++) {  
+      data[i] += i ;  
+    }  
+  
+    #pragma omp target update from(data[0:8:2])  
+  }  
+  // from results  
+  // CHECK: 0.000000
+  // CHECK: 1.000000
+  // CHECK: 4.000000
+  // CHECK: 3.000000
+  // CHECK: 8.000000
+  // CHECK: 5.000000
+  // CHECK: 12.000000
+  // CHECK: 7.000000
+  // CHECK-NOT: 2.000000
+  // CHECK-NOT: 6.000000
+  // CHECK-NOT: 10.000000
+  // CHECK-NOT: 14.000000
+
+  printf("from target array results:\n");  
+  for (int i = 0; i < len; i++)  
+    printf("%f\n", data[i]);  
+  printf("\n");  
+  
+  return 0;  
+}  
+