Intel® Fortran Compiler
Build applications that can scale for the future with optimized code designed for Intel® Xeon® and compatible processors.
Announcements
Welcome to the Intel Community. If you get an answer you like, please mark it as an Accepted Solution to help others. Thank you!

unable to assign value correctly

Zuodong_Y_
Beginner
302 Views

Here is the code to reproduce the problem

program main
	implicit none
	integer :: to(1:2),from(1,2),i
	from(1,:)=[1,2]
	i=1
	to(i:2)=mod((from(1,1:2)),4)
	write(*,*)"from:",from
	write(*,*)"to:",to
end program

compiled with Intel(R) Fortran Intel(R) 64 Compiler for applications running on Intel(R) 64, Version 17.0.4.196 Build 20170411

the variable "to" should be equal to "from" but it doesn't. Seems only the first element of "to" is assigned.

0 Kudos
1 Solution
Ron_Green
Moderator
274 Views

This bug is fixed in PSXE 2020 Update2.


View solution in original post

4 Replies
andrew_4619
Honored Contributor I
302 Views
MOD would create an array with the same rank and shape as its arg. 
I made a test using and intermediate array (maybe the compiler creates a temp ) 
but that code (shown below) works.  I suspect either your code is 
nonconforming (but no error is given) or there is a compiler bug. 
Not sure which.


        implicit none
        integer :: to(1:2), from(1,2), i, to2(1,2)
        from(1,:)=[1,2]
        i=1
        to2(i,1:2) = mod(from(1,1:2),4)
        to(i:2) = to2(i,1:2)

 

Steve_Lionel
Black Belt Retired Employee
302 Views

Interesting. The key is the use of i in to(i:2). If that is replaced by to(1:2), it works. This is a compiler bug, still broken in 19.1. Please report it to Intel using the Online Service Center.

Ron_Green
Moderator
302 Views

I opened a bug report.  ID is CMPLRIL0-32400

 

Ron_Green
Moderator
275 Views

This bug is fixed in PSXE 2020 Update2.


View solution in original post

Reply