A fix is available
APAR status
Closed as program error.
Error description
Compiler generates invalid code with OPT(2)
Local fix
Do not use optimization.
Problem summary
**************************************************************** * USERS AFFECTED: Users of Enterprise COBOL V5.2 compiling * * programs with OPT(2) that contain several * * successive compares for equality with no * * intervening code (e.g. IF A = X AND B = X). * * * **************************************************************** * PROBLEM DESCRIPTION: Incorrect output at runtime: The * * optimizer will attempt to combine * * several smaller compares into one * * larger compare. Rarely, it would do so * * when the combined compare would have * * different behavior than the individual * * compares. * * * **************************************************************** * RECOMMENDATION: Apply the provided PTF. * * * **************************************************************** The optimizer can combine successive compares if the data items being compared are sequential in memory. The optimizer was incorrectly combining compares at OPT(2) by only considering the offsets of the data items and not which base addresses they were relative to.
Problem conclusion
The optimizer will now only combine successive compares if the data items are consecutive relative to the same base addresses.
Temporary fix
Comments
APAR Information
APAR number
PI59428
Reported component name
ENT COBOL FOR Z
Reported component ID
5655W3200
Reported release
520
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-03-18
Closed date
2016-05-27
Last modified date
2016-07-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Modules/Macros
IGYCBE
Fix information
Fixed component name
ENT COBOL FOR Z
Fixed component ID
5655W3200
Applicable component levels
R520 PSY UI38258
UP16/06/02 P F606
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
04 July 2016