Fixes are available
March 2013 PTF for XL C for AIX, V12.1
March 2013 PTF for XL C/C++ for AIX, V12.1
XL C/C++ for AIX Fix Pack 4 (June 2013 PTF) for 12.1
XL C/C++ for AIX Fix Pack 5 (September 2013 PTF) for 12.1
XL C/C++ for AIX Fix Pack 7 (January 2014 PTF) for 12.1
XL C for AIX Fix Pack 8 (March 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 8 (March 2014 PTF) for 12.1
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 4 (June 2013 PTF) for 12.1
XL C for AIX Fix Pack 5 (September 2013 PTF) for 12.1
XL C for AIX Fix Pack 6 (December 2013 PTF) for 12.1
XL C/C++ for AIX Fix Pack 6 (December 2013 PTF) for 12.1
XL C for AIX Fix Pack 7 (January 2014 PTF) for 12.1
XL C for AIX Fix Pack 9 (July 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 9 (July 2014 PTF) 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
xlC initializes struct and union member with inefficient loads from constant area while load immediate could be used to create the values that are stored to the struct/union. ===== COMPILE COMMAND: xlC -q64 -O2 -qlist -c test.C ===== TESTCASE: $ cat test.C struct sqlz_value { unsigned short type; union { unsigned short clen; struct { unsigned char m; unsigned char n; } dlen; } len; unsigned char *data; }; extern "C" void intToDec(struct sqlz_value *dec, int i); extern "C" void init(int i) { struct sqlz_value promote; promote.type = 2; promote.len.dlen.m = 11; promote.len.dlen.n = 0; intToDec(&promote, i); } $ When looking at the provided test case, only the 0 gets loaded using li. But for 11, two loads from constant area are used. 18| PROC i,gr3 0| 000000 mfspr 7C0802A6 1 LFLR gr0=lr 0| 000004 ld E8A20008 1 L8 gr5=.+CONSTANT_AREA(gr2,0) 0| 000008 stdu F821FF81 1 ST8U gr1,#stack(gr1,-128)=gr1 24| 00000C extsw 7C6407B4 1 EXTS4 gr4=gr3 24| 000010 addi 38610070 1 AI gr3=gr1,112 0| 000014 std F8010090 1 ST8 #stack(gr1,144)=gr0 23| 000018 addi 38000000 1 LI gr0=0 23| 00001C stb 98010073 1 ST1Z <a1:d115:l1>(gr1,115)=gr0 22| 000020 lhz A0050000 1 L2Z gr0=+CONSTANT_AREA(gr5,0) <---- here 22| 000024 lbz 88A50002 1 L1Z gr5=+CONSTANT_AREA(gr5,2) <---- here 22| 000028 sth B0010070 1 ST2Z promote.|type@0#11|m@2#12_1(gr1,112)=gr0 22| 00002C stb 98A10072 1 ST1Z promote.|type@0#11|m@2#12_1(gr1,114)=gr5 24| 000030 bl 4BFFFFD1 1 CALL intToDec,2,promote",gr3,gr4,#ProcAlias",intToDec",fcr",gr1,cr[01 567]",gr0",gr3"-gr12",fp0"-fp13",mq",lr",fcr",xer",fsr",ca",ctr" 24| 000034 ori 60000000 1 25| 000038 ld E9810090 1 L8 gr12=#stack(gr1,144) 25| 00003C addi 38210080 1 AI gr1=gr1,128 25| 000040 mtspr 7D8803A6 1 LLR lr=gr12 25| 000044 bclr 4E800020 1 BA lr
Local fix
n/a
Problem summary
TBD
Problem conclusion
TBD
Temporary fix
Comments
APAR Information
APAR number
IV28620
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 / Xsystem
Submitted date
2012-09-25
Closed date
2012-11-09
Last modified date
2013-03-13
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
RC10 PSY UP
C
Document Information
Modified date:
21 August 2024