76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
// This test checks that "update to" clause in OpenMP is supported when the
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// elements are updated in a non-contiguous manner. This test checks that
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// #pragma omp target update to(data[0:4:2]) correctly updates only every
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// other element (stride 2) from the host to the device
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// RUN: %libomptarget-compile-run-and-check-generic
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// https://github.com/llvm/llvm-project/issues/182119
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// UNSUPPORTED: intelgpu
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#include <omp.h>
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#include <stdio.h>
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int main() {
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int len = 8;
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double data[len];
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// Initialize on host
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for (int i = 0; i < len; i++) {
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data[i] = i;
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}
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// Initial values
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printf("original host array values:\n");
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for (int i = 0; i < len; i++)
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printf("%f\n", data[i]);
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printf("\n");
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#pragma omp target data map(tofrom : len, data[0 : len])
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{
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// Initialize device to 20
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#pragma omp target
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for (int i = 0; i < len; i++) {
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data[i] = 20.0;
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}
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// Modify host for strided elements
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data[0] = 10.0;
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data[2] = 10.0;
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data[4] = 10.0;
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data[6] = 10.0;
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#pragma omp target update to(data[0 : 4 : 2])
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// Verify on device by adding 5
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#pragma omp target
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for (int i = 0; i < len; i++) {
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data[i] += 5.0;
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}
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}
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// CHECK: 0.000000
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// CHECK: 1.000000
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// CHECK: 2.000000
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// CHECK: 3.000000
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// CHECK: 4.000000
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// CHECK: 5.000000
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// CHECK: 6.000000
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// CHECK: 7.000000
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printf("device array values after update to:\n");
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for (int i = 0; i < len; i++)
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printf("%f\n", data[i]);
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printf("\n");
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// CHECK: 15.000000
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// CHECK: 25.000000
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// CHECK: 15.000000
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// CHECK: 25.000000
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// CHECK: 15.000000
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// CHECK: 25.000000
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// CHECK: 15.000000
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// CHECK: 25.000000
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return 0;
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}
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