Fixes are available
APAR status
Closed as program error.
Error description
When compiling a large program using -O3, the complile time drastically increases than compared to compiling t -O2 or without any optimizations. eg: When using -qphsinfo, the detailed compile time output can be observed: $xlC_r -qoptimize=3 -qphsinfo -qtmplparse=warn -q64 -qfuncsect -qrtti=all -qlanglvl=newexcp -qeh=v6 -qutf -qtabsize=4 -D__IBMCPP_TR1__ -qtbtable=full -c -o BulkImport.o BulkImport.i -+ Front End - Phase Ends; 8.405/ 8.413 IPA - Phase Ends; 74.070/ 74.250 W-TRANS - Phase Ends; 10.480/ 10.490 OPTIMIZ - Phase Ends; 6636.230/6692.010 REGALLO - Phase Ends; 186.540/249.420 AS - Phase Ends; 0.130/ 0.140 IPA - Phase Ends; 74.070/ 74.250 $
Local fix
N/A
Problem summary
USERS AFFECTED: User compiling a large program with optimization may be affected by this issue. PROBLEM DESCRIPTION: The compile time problem was caused by the alias information generation for the function descriptor during a specific optimization within xlCcode.
Problem conclusion
The compiler has been fixed to reduce some overheads in the computation of the aliasing of the function descriptor.
Temporary fix
Comments
APAR Information
APAR number
LI75897
Reported component name
XL C/C++ RHEL52
Reported component ID
5724U8310
Reported release
A10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-01-27
Closed date
2011-01-27
Last modified date
2011-01-27
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 C/C++ RHEL52
Fixed component ID
5724U8310
Applicable component levels
RA10 PSN IZ83459
UP06/09/13
[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSJT9L","label":"XL C\/C++"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"A.1","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}}]
Document Information
Modified date:
15 October 2021