Fixes are available
XL C/C++ for AIX Fix Pack 11 (February 2015 PTF) for 12.1
XL C for AIX Fix Pack 12 (May 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 12 (May 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 13 (August 2015 Update) for 12.1
XL C/C++ for AIX Fix Pack 14 (December 2015 Update) for 12.1
XL C for AIX Fix Pack 15 (April 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 15 (April 2016 Update) for 12.1
XL C for AIX Fix Pack 16 (July 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 16 (July 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 17 (November 2016 Update) for 12.1
XL C for AIX Fix Pack 17 (November 2016 Update) for 12.1
XL C for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL C for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C for AIX Fix Pack 20 (March 2018 Update) for 12.1
XL C/C++ for AIX Fix Pack 20 (March 2018 Update) for 12.1
XL C for AIX Fix Pack 10 (October 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 10 (October 2014 PTF) for 12.1
XL C for AIX Fix Pack 11 (February 2015 PTF) for 12.1
XL C for AIX Fix Pack 13 (August 2015 Update) for 12.1
XL C for AIX Fix Pack 14 (December 2015 Update) for 12.1
XL C/C++ for AIX Fix Pack 21 (January 2019 Update) for 12.1
XL C for AIX Fix Pack 21 (January 2019 Update) for 12.1
APAR status
Closed as program error.
Error description
Too many group breaking XNOP ori instructions are scheduled into the code, resulting in multiple consecutive XNOPs or affecting dispatch groups. === EXAMPLE === 23| 00000C stw 90010070 1 ST4A 0| 000010 ori 60420000 1 XNOP 0| 000014 ori 60420000 1 XNOP ** Multiple ori 0| 000018 ori 60420000 1 XNOP 0| 00001C ori 60420000 1 XNOP 0| 000020 ori 60420000 1 XNOP 23| 000024 lxvd2x 7C011E98 1 VLQD 15| 000058 addi 38600080 1 LI 14| 00005C stxvd2x 7C410799 1 VSTQD 0| 000060 ori 60420000 1 XNOP 15| 000064 stxvd2x 7C611F99 1 VSTQD 0| 000068 ori 60420000 1 XNOP 16| 00006C ld E8010070 1 L8 0| 000070 ori 60420000 1 XNOP ** Superfluous ori 16| 000074 ld E8610080 1 L8 17| 000078 addi 38210090 1 AI
Local fix
Problem summary
PROBLEM DESCRIPTION: Inefficient scheduling with -qtune=pwr7. USERS AFFECTED: Those using -qtune=pwr7 with -O2 and up.
Problem conclusion
Fixed an instruction scheduling issue that was causing inefficient scheduling of XNOP ori instructions.
Temporary fix
Comments
APAR Information
APAR number
IV61672
Reported component name
XL C/C++ FOR AI
Reported component ID
5725C7200
Reported release
C10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2014-06-19
Closed date
2014-10-23
Last modified date
2014-10-23
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 FOR AIX
Fixed component ID
5725C7100
Applicable component levels
Document Information
Modified date:
01 October 2021