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C/C++

Showing 35

Improve code generation for simple functions

Improve code generation for simple functions in METAL C: int func(const void* a, const void* b) { return memcmp(a,b,8); } in ILP32 mode the following code is generatedFUNC DS 0F STM 14,15,12(13) LR 15,13 L 13,8(,13) ST 15,4(,13) @@BGN@2 DS 0H USIN...
over 6 years ago in C/C++ and Fortran Compilers / C/C++ 5 Not under consideration

Inline __asm() to communicate ARCHLVL to HLASM for system macros

When a z/OS system macro is embedded in a __asm() block, HLASM assumes ARCHLVL=1 which means the macro will use base+displacement branching, which fails in an inline __asm() block due to "no active USING". Most macros implement a MF=E form which g...
over 6 years ago in C/C++ and Fortran Compilers / C/C++ 3 Not under consideration

Reliable indicator of AMODE in F7SA chain

When using Metal C, calling an ASCmode=AR function creates an ambiguous F7SA save area (in the DSA chain). The AMODE is switched BEFORE the call (BASR) is executed, and restored AFTER the return, so the AMODE of the caller (and therefore the DSAUS...
about 7 years ago in C/C++ and Fortran Compilers / C/C++ 2 Not under consideration

z/OS XL C/C++ allow GENASM and __asm without using METAL C

Separate GENASM and METAL C/C++ compiler options and allow calling of operating system services directly from a non-METAL C/C++ program using __asm language extension.
about 11 years ago in C/C++ and Fortran Compilers / C/C++ 3 Not under consideration

xlc listing files for inline functions incorrect

Found a surprising limitation with xlc listing files for inline functions that are in .h files. The listing for such functions in the PDEF section has a line number like 691 | which doesn't reflect the source line number at the top of that .lst fi...
over 11 years ago in C/C++ and Fortran Compilers / C/C++ 4 Not under consideration

SASC/C++ Compiler Migration to XL C/C++

Below SASC/C++ functions are not available in XL C/C++ for RUV product. Could you please provide this functionality? S No. Function/ Parameters Description1 abort abnormally terminate execution2 access test for the existence and access privileges ...
almost 4 years ago in C/C++ and Fortran Compilers / C/C++ 3 Not under consideration

Raise a severe error if an unknown instruction is generated

If the Compiler/Optimizer generates an invalid unknown instruction (UNKWN), it have to raise a Severe Error. The assembly list shows unknown ?UNKWN? instructions: 000027 | ALRK r8,r7,r9 000027 | UNKWN r15,r3 000027 | UNKWN r8,r6 000027 | C r0,s.uw...
over 8 years ago in C/C++ and Fortran Compilers / C/C++ 7 Not under consideration

Add support for function inlining at OPT(0) [Metal C]

The METAL option of the xlc compiler does not support selectively inlining functions without optimizing the rest of the code We would like to be able to use a compiler attribute (such as "__always_inline__" or "_inline") to force inlining of certa...
over 4 years ago in C/C++ and Fortran Compilers / C/C++ 2 Not under consideration

#pragma report should be extended to C

It is very frustrating that this pragma is not available in C, but only in C++!
over 9 years ago in C/C++ and Fortran Compilers / C/C++ 4 Not under consideration

Perform optimizations based on __attribute__((__malloc__))

Currently, __attribute__((__malloc__)) does not work as documented in the compiler docs. The documentation infers that the compiler performs certain optimizations when using __malloc__ attribute. However, it appears that the compiler simply tolera...
over 9 years ago in C/C++ and Fortran Compilers / C/C++ 4 Not under consideration

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