Fixes are available
November 2010 Update for XL C/C++ for Linux, V11.1
XL C/C++ for Linux Fix Pack 9 (August 2013 Update) for 11.1
April 2011 Update for XL C/C++ for Linux, V11.1
July 2011 Update for XL C/C++ for Linux, V11.1
October 2011 Update for XL C/C++ for Linux, V11.1
June 2012 Update for XL C/C++ for Linux, V11.1
October 2012 Update for XL C/C++ for Linux, V11.1
XL C/C++ for Linux Fix Pack 8 (June 2013 Update) for 11.1
APAR status
Closed as program error.
Error description
When compiling the following test case with optimization and specifying an architecture setting with -qarch, the compiler is encountering an internal error with -O2 and outputting incorrect results with the generated binary at -O3. ===== TEST CASE ===== xlc archbug.c -q64 -O2 -qarch=pwr4 <-- Internal Compiler Error xlc archbug.c -q64 -O3 -qarch=pwr4 <-- Incorrect result int two = 2; double val[] = {1, 2}; int main(void) { int sfirst, i; long n, m; sfirst = 1; for (i = 0; i < two; i++) if (sfirst) { n = val[i]; sfirst = 0; } else m = val[i]; if (val[0] == n && val[1] == m) printf("Good!\n"); else printf("Bad!\n"); return 0; }
Local fix
Do not use -qarch with affected source code.
Problem summary
PROBLEM DESCRIPTION: While converting an int to float, the compiler is using the incorrect source. USERS AFFECTED: Customers using -qarch settings that make use of the PowerPC graphics instructions.
Problem conclusion
The graphics_cvt was corrected and the issue no longer occurs.
Temporary fix
Comments
APAR Information
APAR number
LI75760
Reported component name
XL C/C++ FOR LI
Reported component ID
5724X1400
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2010-11-24
Closed date
2010-11-24
Last modified date
2010-11-24
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++ FOR LI
Fixed component ID
5724X1400
Applicable component levels
RB10 PSN IZ79546
UP06/09/13
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Document Information
Modified date:
15 October 2021