Fixes are available
July 2012 PTF for XL C/C++ for AIX, V11.1
October 2012 PTF for XL C/C++ for AIX, V11.1
February 2013 PTF for XL C/C++ for AIX, V11.1
XL C/C++ for AIX Fix Pack 14 (May 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 15 (August 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 16 (November 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 17 (February 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 18 (May 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 19 (August 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 20 (November 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 21 (April 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 22 (September 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 23 (March 2016 PTF) for 11.1
XL C/C++ for AIX Fix Pack 24 (September 2016 PTF) for 11.1
APAR status
Closed as program error.
Error description
The compiler produces an internal compiler error when compiling the following testcase that has inline asm memory operands and the -O compile time option: =====Testcase: $cat test.cpp inline static void add_atomic(unsigned long volatile *sum, unsigned long inc) { unsigned long oldval; unsigned long newval; unsigned long zero = 0; asm( " lwsync \n\t" "1: ldarx %[ov],0,%[sum],0 \n\t" // get old ctr and reserve " add %[nv],%[ov],%[inc] \n\t" // increment " stdcx. %[nv],0,%[sum] \n\t" // store updated value " bne 1b \n\t" // reservation lost? -> retry " isync \n\t" : [sum] "+b" (sum) /* outputs */ , [ov] "=&b" (oldval) /* outputs */ , [nv] "=&b" (newval) /* outputs */ : [inc] "b" (inc) /* inputs */ : "cr0" /* clobbered */ ); } int main() { static unsigned long tm[20]; add_atomic(&tm[0], 0); } $ ===== ACTUAL OUTPUT: $xlc_r -q64 -o testcase -O testcase.cpp /usr/vacpp/bin/.orig/xlc_r: 1501-230 (S) Internal compiler error; please contact your Service Representative. For more information visit: http://www.ibm.com/support/docview.wss?uid=swg21110810 $ ===== EXPECTED OUTPUT: Should not ICE at -O2 or above.
Local fix
n/a
Problem summary
USERS AFFECTED: Users that have applications that make use of inline functions which have inline asm code using pointer as output operand, and replaces with the address of an array at opt may be affected by this issue. PROBLEM DESCRIPTION: The compiler issues an internal compiler error when users compile applications that have inline functions which have inline asm code using pointer as output operand.
Problem conclusion
The compiler has been fixed so it will not replace the asm output opernd with the new optimized expression if it is a pointer.
Temporary fix
Comments
APAR Information
APAR number
IV24393
Reported component name
XL C/C++ AIX
Reported component ID
5724X1300
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-07-05
Closed date
2012-07-05
Last modified date
2012-07-05
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++ AIX
Fixed component ID
5724X1300
Applicable component levels
RB10 PSN U852967
UP06/09/13 C
Document Information
Modified date:
05 July 2012