[PATCH] D108132: Add implicit map for a list item appears in a reduction clause.

[Jennifer Yu via Phabricator via cfe-commits]

jyu2 added a comment.

Hi ABataev,
Thanks for  reviedw.

In D108132#2946927 <https://reviews.llvm.org/D108132#2946927>, @ABataev wrote:

> Why it can not be performed in codegen?

I am not sure I can do that.  Do you mean when generate map adding coding code to look though reduction clause and generate map for it?

Here is the runtime test, I am trying to find way on how to add runtime test in clang.  But in my added test reduction_implicit_map.cpp, I did checked IR for this.

The command line: without may change:
cmplrllvm-25845>clang -fopenmp -fopenmp-targets=x86_64-pc-linux-gnu o.cpp -g
cmplrllvm-25845>./a.out
Segmentation fault (core dumped)
with may change:
cmplrllvm-25845> ./a.out
Result=5050

test
----

extern "C" int printf(const char *,...);
void sum(int* input, int size, int* output)
{

  #pragma omp target teams distribute parallel for reduction(+:output[0]) map(to:input[0:size]) //map(output[0])
  for(int i=0; i<size; i++)
      output[0] += input[i];

}
int main()
{

  const int size = 100;
  int *array = new int[size];
  int result = 0;
  for (int i = 0; i < size; i++)
      array[i] = i + 1;
  sum(array, size, &result);
  printf("Result=%d\n", result);
  delete[] array;
  return 0;

}


Repository:
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  https://reviews.llvm.org/D108132/new/

https://reviews.llvm.org/D108132