Fixes are available
April 2011 Update for XL Fortran for Linux, V13.1
July 2011 Update for XL Fortran for Linux, V13.1
October 2011 Update for XL Fortran for Linux, V13.1
June 2012 Update for XL Fortran for Linux, V13.1
October 2012 Update for XL Fortran for Linux, V13.1
XL Fortran for Linux Fix Pack 8 (June 2013 Update) for 13.1
APAR status
Closed as program error.
Error description
The -qstrict=vectorprecision option is required to ensure that results are reproducible independent of the position of an element in an array. Compiling with this options is effectively disabling vectorization of code by not generating calls to vectorized implementations of certain math functions, thus causing a performance hit.
Local fix
N/A
Problem summary
PROBLEM DESCRIPTION: Option -qstrict=vectorprecision incorrectly disables automatic vectorization (MASSV call generation) in the high level optimizer. USERS AFFECTED: Users of XL Fortran compiling with -qstrict=vectorprecision at -O3 opt level or higher
Problem conclusion
The fix enables automatic optimization of code containing opportunities for MASSV vectorization when option -qstrict=vectorprecision is in effect. The high level compiler optimizer will generate MASSV calls when the generated call produces position independent results.
Temporary fix
Comments
APAR Information
APAR number
LI76056
Reported component name
XL FORTRAN LINU
Reported component ID
5724X1600
Reported release
D10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2011-04-27
Closed date
2011-04-27
Last modified date
2011-04-27
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
XL FORTRAN LINU
Fixed component ID
5724X1600
Applicable component levels
RD10 PSN IZ87797
UP06/09/13
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Document Information
Modified date:
17 October 2021