IFX works only with -check stack active

[P_Minelli]

Hi,

i am trying to use mpiifx instead of mpiifort to run my code.

In both cases, i am able to compile but when i try to run them, the version compiled with mpiifx is able to work only if i use -check stack option.

Since this option deactivate any kind of optimization, is there a different way to solve this problem?

Thanks in advance

[Ron_Green]

I need to see all the compiler options you give to mpiifx

[P_Minelli]

Thanks for your reply, i have some updates.

I was able to compile it with optimizations but with some changes.

1) I had to comment the directive "!DIR$ VECTOR ALIGNED" that was present before two different loops.

2) I need to add one of these options: -fstack-security-check, -fstack-protector-strong, -fstack-protector-all

Both changes are not needed if i use mpiifort.

These are my compiler options for both codes:

mpiifort

-O3 -xHost -mcmodel medium -shared-intel -warn all -warn noexternals

mpiifx

-O3 -xHost -mcmodel medium -shared-intel -warn all -warn noexternals + (see point 2)

[Ron_Green]

the option 

-align array64bytes 

could be added.  it sometimes helps performance.  this aligns all arrays on 64byte boundaries.  

[P_Minelli]

Thank you for the suggestion.
It helps the performance but still those two fixes remain necessary to be able to use “mpiifx” instead of “mpiifort”