APAR status
Closed as program error.
Error description
Compilation at -O5 optimization results in the generation of an executable that hanges at run-time.
Local fix
Use a lower optimization level.
Problem summary
PROBLEM DESCRIPTION: A runtime failure (incorrect results, seg faults, or hang) is encountered due to incorrect aliasing. USERS AFFECTED: Users who compile at -O5 optimization.
Problem conclusion
The problem occurs when there is a call in the code to a known library functions which returns an address with the value of one of the address argument, the compiler may miss the link of these two pointers and get their aliasing wrong. The fix is to link these kinds of pointers, and thus their aliasing. The performance impact should be minimal.
Temporary fix
Comments
APAR Information
APAR number
IZ92770
Reported component name
XL C++ AIX
Reported component ID
5724U8100
Reported release
A10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-01-21
Closed date
2011-01-21
Last modified date
2011-01-21
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++ AIX
Fixed component ID
5724U8100
Applicable component levels
RA10 PSN IZ87170
UP06/09/13
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Document Information
Modified date:
21 January 2011