インテル® Fortran コンパイラー 19.0 デベロッパー・ガイドおよびリファレンス
Run-Time Subroutine: Inserts a memory fence instruction that ensures completion of all preceding load and store instructions.
USE IFCORE
CALL FOR_MFENCE ()
Using this subroutine guarantees that in program order, every load and store instruction that precedes the memory fence instruction is globally visible before any load or store instruction that follows the memory fence can proceed.