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C/C++

Showing 42 of 8217

RFE for header file cache optimization on C compiler

We would like to see the following implemented with the C compiler frontend just like it is for the C++ compiler frontend beginning with Xlc 12.1: -qxflag=dircache[,m[,n]] where m and n are optional * m is a integral prime number between 2 and 71 ...
over 10 years ago in C/C++ and Fortran Compilers / C/C++ 5 Not under consideration

Need more builtin functions in C/C++ compiler

In the XL C/C++ Programming Guide there are only a few General instructions like __pack and __unpack.In order for Metal C to be used for system software it would be better if these instructions were expanded so __asm would not have to be used as o...
over 5 years ago in C/C++ and Fortran Compilers / C/C++ 2 Not under consideration

Allow -qlistfmt=html=inlines to break down the report into multiple files

Allow the reporting tools to generate multiple report files depending on the size limit provided by the client.
over 6 years ago in C/C++ and Fortran Compilers / C/C++ 2 Not under consideration

Document and support #pragma once in both C/C++

The z/OS C++ compiler supports the #pragma once directive. This is undocumented and not supported for the C language. This feature should be documented and supported for both the C and C++ languages.
almost 7 years ago in C/C++ and Fortran Compilers / C/C++ 2 Not under consideration

#line directive causing source to not be intermixed in ASM listing

Sometimes C source code is embedded within generated pseudo assembly listings via the LIST option, like: 00012E 50D0 E004 000008 | ST r13,4(,r14)000132 18DE 000008 | LR r13,r14000134 End of Prolog 000009 | * { 000010 | * return foo();000134 58F0 3...
over 7 years ago in C/C++ and Fortran Compilers / C/C++ 3 Not under consideration

XL C/C++ compiler setting to disallow vector (VMX/VSX) instructions

Request for the compiler to support code generation consistent with an AIX tuning of allow_vmx=0. The AIX tuning rejects all vector instructions, treating them as illegal operations. The compiler should have a corresponding option to completely di...
almost 8 years ago in C/C++ and Fortran Compilers / C/C++ 2 Future consideration

87671, 49R, 000 BGQ , xlc++ 12.1.0.7 -O2 slow , vulcan , John Gyllenhaal

-------- Forwarded Message --------Subject: RE: 87671, 49R, 000 BGQ , xlc++ 12.1.0.7 -O2 slow , vulcan , John GyllenhaalDate: Wed, 21 Jan 2015 14:54:40 -0500From: Viktor Ganich <vganich@ca.ibm.com>To: Paul Szepietowski <pauls@llnl.gov>...
over 9 years ago in C/C++ and Fortran Compilers / C/C++ 4 Not under consideration

Behaviour of comma operator in C++

We use multiple C and C++ compilers, including IBM XL C/C++ for AIX V11.1.0.18. XL C++ appears to treat comma expressions differently depending if they are an argument to a return statement or a function or if they are used elsewhere. This behavio...
over 9 years ago in C/C++ and Fortran Compilers / C/C++ 3 Not under consideration

Long compile time with -qsmp=omp for non-openmp files

XLC enforces -qhot optimization steps with -qsmp=omp option even for non-OMP source files, making the compile time unnecessarily long for such cases. The -qsmp=omp compile time issue becomes a dramatic problem because in user's makefile, the optio...
about 10 years ago in C/C++ and Fortran Compilers / C/C++ 6 Not under consideration

DB2 & CICS coprocessors do not provide enough debug information

To convert to co-processors we need to have the CICS and DB2 listings or something equivalent. We always print the first page of the DB2 and CICS pre-processor listingbecause they tell the applications the verson of DB2 the program was compiled us...
about 10 years ago in C/C++ and Fortran Compilers / C/C++ 4 Not under consideration

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