[PATCH] D109321: [clang][OpenMP] Fix the bug in codegen for ordered directive

[Peixin Qiao via Phabricator via cfe-commits]

peixin added a comment.

`for (i = 0; i < N; i++)` --> `for (i = 1; i < N; i++)`

  #include <iostream>
  using namespace std;
  
  int main() {
    float a[10];
    int i, N = 10;
    for (i = 0; i < N; i++)
      a[i] = 0;
  
    #pragma omp simd
    for (i = 1; i < N; i++) {
      #pragma omp ordered simd
      a[i] = a[i-1] + 1.0;
    }
  
    for (i = 0; i < N; i++)
      cout << a[i] << "  ";
    cout << endl;
  }



  $ clang++ -fopenmp simd.cpp && ./a.out
  0 1  2  3  4  5  6  7  8  9
  $ clang++ -fopenmp -O1 simd.cpp && ./a.out
  0 1  1  1  1  2  1  1  1  2


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D109321/new/

https://reviews.llvm.org/D109321