[all-commits] [llvm/llvm-project] 56223b: [OpenMP] Help static loop code avoid over/underflow

[Jonathan Peyton via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 56223b1e91ed444a054aa9bd20878d0b62c7b53b
      https://github.com/llvm/llvm-project/commit/56223b1e91ed444a054aa9bd20878d0b62c7b53b
  Author: Peyton, Jonathan L <jonathan.l.peyton at intel.com>
  Date:   2021-02-22 (Mon, 22 Feb 2021)

  Changed paths:
    M openmp/runtime/src/kmp_dispatch.cpp
    M openmp/runtime/src/kmp_sched.cpp
    A openmp/runtime/test/worksharing/for/omp_for_static_large_chunk.c

  Log Message:
  -----------
  [OpenMP] Help static loop code avoid over/underflow

This code alleviates some pathological loop parameters (lower,
upper, stride) within calculations involved in the static loop code.  It
bounds the chunk size to the trip count if it is greater than the trip
count and also minimizes problematic code for when trip count < nth.

Differential Revision: https://reviews.llvm.org/D96426