Fixes are available
XL C/C++ for Linux Fix Pack 8 (October 2015 Update) for 12.1
XL C/C++ for Linux Fix Pack 4 (October 2013 Update) for 12.1
XL C/C++ for Linux Fix Pack 5 (December 2013 Update) for 12.1
XL C/C++ for Linux Fix Pack 6 (February 2014 Update) for 12.1
XL C/C++ for Linux Fix Pack 7 (May 2014 Update) for 12.1
APAR status
Closed as program error.
Error description
Compiler adds improvements to memset generated code.
Local fix
N/A
Problem summary
inefficient code being generated for memset. There are several issues 1) The constant area is used to hold the splatted value of the character 2) we don't always widen the stores to 8 bytes 3) there are unnecessary multiply instructions generated by widening
Problem conclusion
The test in macro expansion to decide whether to use 4 byte or 8 byte stores was incorrect. Having macro expansion generate 8 byte stores means that widening is no longer involved. Also, instead of putting the constant into the constant area, let the normal macro expansion code decide how to manifest the constant.
Temporary fix
Comments
APAR Information
APAR number
LI77668
Reported component name
XL C/C++ FOR LI
Reported component ID
5725C7300
Reported release
C10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-10-28
Closed date
2013-10-28
Last modified date
2013-10-28
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++ FOR LI
Fixed component ID
5725C7300
Applicable component levels
RC10 PSN IV48060
UP06/09/13
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Document Information
Modified date:
14 October 2021