search for: numeric_limits

Hi all, can I access the numeric limits of the llvm types, e.g. HalfTy, FloatTy, DoubleTy, etc. in a fashion like the std numeric_limits tool? std::numeric_limits<half>::min() std::numeric_limits<half>::max() In c++API, I want to initialize values and need to know the correct range for the llvm types.... Thx Alex

...the error). Yes, that's exactly what I meant... thanks for reading my mind! :) It looks like this is where things start to go downhill (LiveIntervals.cpp:559): LiveIntervals::Interval::Interval(unsigned r) : reg(r), weight((MRegisterInfo::isPhysicalRegister(r) ? std::numeric_limits<float>::infinity() : 0.0F)) { For a physical register (EDX in this case) it appears that the interval is being created, but gets a 0 weight instead of an infinity weight. This implies that the MRegisterInfo::isPhysicalRegister might have an issue, or std::numeric_limits has an issue. Coul...

...>I think that we should switch to C constants in this case. Can you try >#include <math.h> and use HUGE_VAL instead? > It works: [finna at coplin11 ~/test]$ cat tst.cpp #include <limits> #include <iostream> #include <math.h> int main() { std::cerr << std::numeric_limits<float>::infinity() << "\n"; std::cerr << HUGE_VAL << "\n"; } [finna at coplin11 ~/test]$ g++ tst.cpp [finna at coplin11 ~/test]$ ./a.out 0 inf [finna at coplin11 ~/test]$ But making the consequential changes in LLVM seems trickier. Do you plan to corre...

Chris Lattner wrote: >Could you try compiling and running this program: > >--- >#include <limits> >#include <iostream> >int main() { > std::cerr << std::numeric_limits<float>::infinity() << "\n"; >} >--- > > Sure thing. It prints "0". Calling that inifinity is somewhat of a stretch, isn't it ? What on earth is going on here? Log: ---------- [finna at coplin11 debug]$ cat - > tst.cpp #include <limits> #...

...in this case. Can you try > >#include <math.h> and use HUGE_VAL instead? > > > It works: > > [finna at coplin11 ~/test]$ cat tst.cpp > #include <limits> > #include <iostream> > #include <math.h> > int main() { > std::cerr << std::numeric_limits<float>::infinity() << "\n"; > std::cerr << HUGE_VAL << "\n"; > } > [finna at coplin11 ~/test]$ g++ tst.cpp > [finna at coplin11 ~/test]$ ./a.out > 0 > inf > [finna at coplin11 ~/test]$ > > But making the consequential changes...

...s: 1) In file included from /home/fceldiener/vcs/llvm/include/llvm/Support/SwapByteOrder.h:20: /usr/bin/../lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/limits:1404:27: error: use of undeclared identifier '__int128'; did you mean '__int128_t'? struct numeric_limits<__int128> ^ /usr/bin/../lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/limits:1478:36: error: expected '>' struct numeric_limits<unsigned __int128> ^ /usr/bin/../lib/gcc/x86_64-redhat-linux/...

OK, details: I run RH8 (gcc 3.2.something), RH9 (gcc 3.2.2-5) and Fedora. Problems are the same across all setups. Hardware is Athlon 1600+ and half a giga RAM. Runs fail with an assertion when the linear scan allocator is enabled, but runs without problems otherwise. On RH9 (the system I have access to while generating this email) I have the following details: > 1) The LLVM assembly

...lvm-obj --enable-languages=c,c++ --disable-multilib when I run: $ make I get the following errors: /home/draikes/src/llvm/include/llvm/ADT/StringRef.h:346:19: error: â EURO ~enable_ifâ EURO (tm) in namespace â EURO ~stdâ EURO (tm) does not name a template type typename std::enable_if<std::numeric_limits<T>::is_signed, bool>::type ^ /home/draikes/src/llvm/include/llvm/ADT/StringRef.h:346:28: error: expected unqualified-id before â EURO ~<â EURO (tm) token typename std::enable_if<std::numeric_limits<T>::is_signed, bool>::type...

On Wed, 5 May 2004, Finn S Andersen wrote: > Chris Lattner wrote: > > >Could you try compiling and running this program: > > > >--- > >#include <limits> > >#include <iostream> > >int main() { > > std::cerr << std::numeric_limits<float>::infinity() << "\n"; > >} > >--- > > > > > Sure thing. It prints "0". Calling that inifinity is somewhat > of a stretch, isn't it ? Well I think that explains why the linscan allocator doesn't work for you! :) It looks l...

...In file included from /home/birdspider/vmkit-test/llvm/include/llvm/Support/SwapByteOrder.h:20: /usr/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/limits:1404:27: error: use of undeclared identifier '__int128'; did you mean '__int128_t'? struct numeric_limits<__int128> ^ /usr/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/limits:1478:36: error: expected '>' struct numeric_limits<unsigned __int128> ^ /usr/bin/../lib/gcc/x86_64-unknown-...

Edward Diener <eldlistmailingz at tropicsoft.com> writes: >> Clang will attempt to use your installed system libraries, usually >> libstdc++ and glibc on a Linux distribution. We could probably maintain >> a libstdc++ compatibility table that says clang x.y is compatible with >> libstdc++ up to z.w. In the vast majority of cases, this just works if >> you

...imenos wrote: > > But making the consequential changes in LLVM seems trickier. > > Do you plan to correct it in CVS, or is there a path I can follow > > to fix it myself on my own installation ? > > The easy way to do it in your area is to replace all occurences of > std::numeric_limits<float>::infinity() with HUGE_VAL. The only two files > that use std::numeric_limits<float>::infinity() are > lib/CodeGen/RegAllocLinearScan.cpp and lib/CodeGen/LiveIntervals.cpp. > > As for CVS, I am not sure this should be fixed because there is > really no LLVM bug here...

The recently added code: static Constant *Div(const ConstantClass *V1, const ConstantClass *V2) { if (V2->isExactlyValue(0.0)) return ConstantClass::get(*Ty, INFINITY); if (V2->isExactlyValue(-0.0)) return ConstantClass::get(*Ty, -INFINITY); if (V2->isNullValue()) return 0; BuiltinType R = (BuiltinType)V1->getValue() / (BuiltinType)V2->getValue(); return

...f (V2->isNullValue()) return 0; > BuiltinType R = (BuiltinType)V1->getValue() / (BuiltinType)V2->getValue(); > return ConstantClass::get(*Ty, R); > } > > does not compile with VC++. The symbol INFINITY is undefined, nor is there > an equivalent I can find. Can std::numeric_limits be used? -Chris -- http://nondot.org/sabre/ http://llvm.cs.uiuc.edu/

...iltinType R = (BuiltinType)V1->getValue() / >> (BuiltinType)V2->getValue(); >> return ConstantClass::get(*Ty, R); >> } >> >> does not compile with VC++. The symbol INFINITY is undefined, nor is >> there an equivalent I can find. > > > Can std::numeric_limits be used? > > -Chris >

...the original software still crashes, but in this example, probably too much is optimized away). // ------------ a.cpp ------------------ #include <iostream> #include <numeric> #include <limits> #include <cfenv> double f(double A,double B) { if (A<B) return std::numeric_limits<double>::max(); return A-B; } int main(int , char**) { feenableexcept(FE_OVERFLOW); //**** NOTE 1 double A=f(.0001002773902563,1.); std::cout<<A<<std::endl; double B; if (A==std::numeric_limits<double>::max()) { // std::cout<<"Good...

On 1/6/2013 9:47 AM, Justin Holewinski wrote: > On Sat, Jan 5, 2013 at 11:08 PM, Edward Diener > <eldlistmailingz at tropicsoft.com <mailto:eldlistmailingz at tropicsoft.com>> > wrote: > > On 1/5/2013 8:01 PM, Justin Holewinski wrote: > > > On Sat, Jan 5, 2013 at 5:59 PM, Edward Diener > <eldlistmailingz at tropicsoft.__com >

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> I'd rather not. The functionality you want is there, feed another > APFloat type through APFloat::convert first. > > Using host FP is not something that should be encouraged; the main > point of APFloat is so people don't have to do that. Why do you want > to, btw? > Yes, i got it working using APFloat::convert. I need host float to output to my backend which

On Jul 9, 2010, at 1:20 PMPDT, Jochen Wilhelmy wrote: >> I'd rather not. The functionality you want is there, feed another >> APFloat type through APFloat::convert first. >> >> Using host FP is not something that should be encouraged; the main >> point of APFloat is so people don't have to do that. Why do you >> want to, btw? > > Yes, i got