Displaying 9 results from an estimated 9 matches for "lindpere".
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lindner
2013 Apr 23
3
[LLVMdev] Optimize away sqrt in simple cases?
hi!
I'm using LLVM 3.2. Does it optimize away llvm.pow(llvm.sqrt(x), 2) to `x`
with any settings? I tried with llc -O3, but that didn't do it.
Would be nice to write |v|² in my language ('v' being a 2D vector say and
|...| and ...² being two separate infix "operators") -- when I could
compare squares of lengths as well as lengths, and know that the sqrt is
optimized
2013 Mar 20
1
[LLVMdev] Debug Info Documentation State
...ogrammed much in C/C++ for years -- mostly been a JVM guy. But at one
point I may want to look into bindings or even creating a bootstrapped
compiler.
On Wed, Mar 20, 2013 at 11:33 PM, Eric Christopher <echristo at gmail.com>wrote:
>
>
>
> On Wed, Mar 20, 2013 at 2:21 PM, Erkki Lindpere <villane at gmail.com> wrote:
>
>> Hi,
>>
>> I wanted to add debug info to my language (compiler written in Scala,
>> outputs .ll files), but I found it really hard to do based on the
>> documentation provided at http://llvm.org/docs/SourceLevelDebugging.html(...
2013 Apr 23
0
[LLVMdev] Optimize away sqrt in simple cases?
That's a pretty seriously unsafe floating point optimization. It could be done in fast-math mode, but I doubt we currently do it.
--Owen
On Apr 23, 2013, at 1:12 PM, Erkki Lindpere <villane at gmail.com> wrote:
> hi!
>
> I'm using LLVM 3.2. Does it optimize away llvm.pow(llvm.sqrt(x), 2) to `x` with any settings? I tried with llc -O3, but that didn't do it.
>
> Would be nice to write |v|² in my language ('v' being a 2D vector say and |....
2011 Jul 29
1
[LLVMdev] Is using lots of in-register values in IR bad?
Thanks for the reply
On Fri, Jul 29, 2011 at 2:06 AM, David A. Greene <greened at obbligato.org>wrote:
> Erkki Lindpere <villane at gmail.com> writes:
> Ok. Do you ever need to grab the address of something on the stack? If
> so you're going to need an alloca. AFAIK, it's the only way to generate
> an address for a local object. This is by design of the IR and it
> greatly simplifies an...
2011 Jul 28
4
[LLVMdev] Is using lots of in-register values in IR bad?
...ructures
by-value. I haven't investigated at which sizes does that become worse than
passing pointers.
Maybe a better alternative would be to allocate memory for every local
value, and let the mem2reg pass optimize?
I hope these kind of questions are appropriate for this list.
Regards,
Erkki Lindpere
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2013 Mar 20
0
[LLVMdev] Debug Info Documentation State
On Wed, Mar 20, 2013 at 2:21 PM, Erkki Lindpere <villane at gmail.com> wrote:
> Hi,
>
> I wanted to add debug info to my language (compiler written in Scala,
> outputs .ll files), but I found it really hard to do based on the
> documentation provided at http://llvm.org/docs/SourceLevelDebugging.html(I looked at the specific...
2011 Jul 28
0
[LLVMdev] Is using lots of in-register values in IR bad?
Erkki Lindpere <villane at gmail.com> writes:
> I want to experiment with avoiding mutable state as far as I can. At
> the moment there are no mutable variables -- only immutable value
> types (numerics, bool, vectors, tuples) and I've been doing everything
> in LLVM registers. The compiler...
2013 Mar 20
2
[LLVMdev] Debug Info Documentation State
Hi,
I wanted to add debug info to my language (compiler written in Scala,
outputs .ll files), but I found it really hard to do based on the
documentation provided at http://llvm.org/docs/SourceLevelDebugging.html (I
looked at the specific doc for LLVM 3.0 though)
With LLVM 3.0, DI version 8 (which is documented there) seemed to work,
except DW_TAG_auto_variable for which I used version tag 11
2013 Apr 23
2
[LLVMdev] Optimize away sqrt in simple cases?
...lvm.sqrt(x) by definition has undefined behavior and so
returning x from llvm.pow(llvm.sqrt(x),2) is acceptable.
The same should be true for -inf.
Only the result for -0.0 changes from 0.0 to -0.0.
Is there something I overlooked?
> --Owen
Christoph
> On Apr 23, 2013, at 1:12 PM, Erkki Lindpere <villane at gmail.com> wrote:
> > hi!
> >
> > I'm using LLVM 3.2. Does it optimize away llvm.pow(llvm.sqrt(x), 2) to `x`
> > with any settings? I tried with llc -O3, but that didn't do it.
> >
> > Would be nice to write |v|² in my language ('v...