A fix is available
APAR status
Closed as program error.
Error description
When compiling a large test case that uses sync() with optimization, the optimizer incorrectly removes a necessary load after the sync() instruction. This incorrect removal of the load instruction causes incorrect output at runtime.
Local fix
Instead of referencing the problematic variable directly; an accessor method can be created to access the variable as a workaround.
Problem summary
USERS AFFECTED: Users who use have a large test case and make use of the sync() function maybe affected by this issue. PROBLEM DESCRIPTION: A problem with optimization(errata) was causing an incorrect removal of some aliasing information which caused an incorrect behaviour at runtime.
Problem conclusion
The compiler has been fixed to properly keep the aliasing information so that the error does not occur at runtime.
Temporary fix
Comments
APAR Information
APAR number
LI77794
Reported component name
XL C/C++ SLES10
Reported component ID
5724U8300
Reported release
A10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2014-01-15
Closed date
2014-01-15
Last modified date
2014-01-15
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++ SLES10
Fixed component ID
5724U8300
Applicable component levels
RA10 PSN IV44421
UP06/09/13
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Document Information
Modified date:
14 October 2021