search for: optimziations

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2010 Oct 11
1
[LLVMdev] Invoking LLVM front-end
...;> Hello LLVMers, >> >> I am developing hardware generation tool which converts C/C++ application to >> hardware which is not a Pass but a separate project. I am going to use LLVM >> as front-end optimization tool. I am curious how I can invoke the LLVM >> front-end optimziations and then, get the pointer of LLVM IR data generated >> by the front-end. I would like to perform some optimziations on the IR. Can >> anybody please direct me to some example codes or documentation about that? >> >> Thank you. >> _______________________________________...
2010 Oct 11
0
[LLVMdev] Invoking LLVM front-end
Hello LLVMers, I am developing hardware generation tool which converts C/C++ application to hardware which is not a Pass but a separate project. I am going to use LLVM as front-end optimization tool. I am curious how I can invoke the LLVM front-end optimziations and then, get the pointer of LLVM IR data generated by the front-end. I would like to perform some optimziations on the IR. Can anybody please direct me to some example codes or documentation about that? Thank you. -------------- next part -------------- An HTML attachment was scrubbed... URL: &lt...
2016 Dec 22
2
struct bitfield regression between 3.6 and 3.9 (using -O0)
Here's our testcase: #include <stdio.h> struct flags { unsigned frog: 1; unsigned foo : 1; unsigned bar : 1; unsigned bat : 1; unsigned baz : 1; unsigned bam : 1; }; int main() { struct flags flags; flags.bar = 1; flags.foo = 1; if (flags.foo == 1) { printf("Pass\n"); return 0; } else {
2016 Dec 22
0
struct bitfield regression between 3.6 and 3.9 (using -O0)
On 12/21/2016 4:45 PM, Phil Tomson via llvm-dev wrote: > Here's our testcase: > > #include <stdio.h> > > struct flags { > unsigned frog: 1; > unsigned foo : 1; > unsigned bar : 1; > unsigned bat : 1; > unsigned baz : 1; > unsigned bam : 1; > }; > > int main() { > struct flags flags; > flags.bar = 1; >
2008 Dec 24
1
Non-finite finite difference error
Hello, I'm trying to use fitdistr() from the MASS package to fit a gamma distribution to a set of data. The data set is too large (1167 values) to reproduce in an email, but the summary statistics are: Min. 1st Qu. Median Mean 3rd Qu. Max. 116.7 266.7 666.7 1348.0 1642.0 16720.0 The call I'm trying to make is: fitdistr(x,"gamma") and the error is: Error in optim(x =
2016 Dec 23
2
struct bitfield regression between 3.6 and 3.9 (using -O0)
Given that this is compiled with -O0, would there a way to skip the Optimization of the Type-legalized selection DAG? It's fine until it optimizes the Type-legalized selection DAG into the Optimized Type-legalized selection DAG. Phil On Thu, Dec 22, 2016 at 10:29 AM, Friedman, Eli <efriedma at codeaurora.org> wrote: > On 12/21/2016 4:45 PM, Phil Tomson via llvm-dev wrote: > >
2018 Sep 13
2
Loop Distribution pass
Jonas/Renato, >I think it's mostly about the success rate, given it's too conservative. But in the past 2 years, improvements in (and around) the LV have been slowed down a bit due to the move >to VPlan. It wasn't our intention to slow down LV improvements, but if the project ended up causing other developers take the stance of wait-and-see, that's an inevitable side effect
2006 Dec 01
2
[LLVMdev] Changing pointer representation?
Having finally found some time to work on this project, I'm currently looking at mechanisms of augmenting LLVM to catch out-of-bounds pointer references. For a variety of reasons, I don't think the approach taken by the Safecode project is appropriate for mine -- particularly, I have no requirement to interface to external code (all code in the system will either be compiled using
2018 Sep 13
4
Loop Distribution pass
Hi, I found with the help of the optimization remarks a loop that could not be vectorized, but if loop distribution was enabled this may happen, which it in fact did with a very significant benchmark improvement (~25%). I tried (on SystemZ) to enable this pass, and found that it only affected a handful of files on SPEC. This means I could enable this without worrying about any regressions on
2007 Apr 18
33
LZO compression?
Hi, I don''t know if this has been discussed before, but have you thought about adding LZO compression to ZFS? One zfs-fuse user has provided a patch which implements LZO compression, and he claims better compression ratios *and* better speed than lzjb. The miniLZO library is licensed under the GPL, but the author specifically says that other licenses are available by request. Has this