Displaying 20 results from an estimated 10000 matches similar to: "[LLVMdev] Writing a pass that modifies the IR"
2011 Feb 18
2
[LLVMdev] EFLAGS and MVT::Glue
The log message for revision 122213 says:
> Change the X86 backend to stop using the evil ADDC/ADDE/SUBC/SUBE nodes (which
> their carry depenedencies with MVT::Flag operands) and use clean and beautiful
> EFLAGS dependences instead.
(MVT::Flag has since been renamed to MVT::Glue.)
That revision made bug 8404 go away.
Am I right in thinking that one of the problems with MVT::Glue is
2012 Apr 20
0
[LLVMdev] def-use chains and use-def chains
Hi Duncan Sands,
I frankly don't know what a variable gets converted to (SSA register or
memory chunk). What I meant is, for example
I1: int i, j=10; I2: scanf("%d", &j); I3: i = j + 1;
Here I want to know whether the value of j in I1 reaches I3 or not.
Best Regards,
Srikanth Vaindam
you didn't define what you mean by a variable. LLVM has virtual registers
which
are
2009 Jun 10
2
How to get the unique pairs of a set of pairs dataframe ?
Hi friends,
Please can anyone help me with an easier solution of doing the below
mentioned work.
Suppose i have a dataset like this:---
i1 i2 i3 i4 i5
1 7 13 1 2
2 8 14 2 2
3 9 15 3 3
4 10 16 4 4
5 11 17 5 5
6 12 18 6 7
*i1,i2,i3,i4,i5 are my items.I am able to find all possible pairs i.e
Say this dataframe is "item_pairs"
**i1,i2
**i1,i3
**i1,i4
i1,i5
**i2,i1
2010 Jan 25
5
[LLVMdev] ambiguity of .align
I just got this error message from the GNU assembler:
Error: alignment too large: 15 assumed
Which made me laugh at first. The corresponding input line was:
.align 16
Apparently what's going on here is that ".align 16" is ambiguous: on
some architectures it means ".balign 16", and on some it means ".p2align
16", which would mean ".balign 65536" if
2010 Dec 31
4
Repeated Indexing / Sequence Operation
Hi Everyone,
quick question before the end of the year.
I have soem indices to select data from a bigger sample. I want to select n
days before each index and n days after the index. Any clever way to do it.
A for loop would do but I wanted to know if there is a moreR-friendly way to
approach this
Example
# InitialIndices
i2 = (90, 190, 290)
# Indices I want to end up with
i3 = c(85, 86, 87,
2003 Sep 25
1
apply on a 4D array
I am trying to multiply a 3D array of 4x4x4 by the 4 3D arrays of a 4D array
with dimensions 4x4x4x4 (the last dimension being the one that I want to
split by).
(4x4x4 array)
> hiaAry
, , a1
i1 i2 i3 i4
h1 9.5936098 6.001040 0.08772 0.3138600
h2 1.2003500 1.454570 2.79248 0.0000000
h3 0.1346500 0.201220 0.39256 0.5464000
h4 0.0109000 0.012270 0.16417 0.2766900
,
2010 Oct 19
2
[LLVMdev] Structure memory layout
Hi Renato,
Firstly, I have been removing target specific information from struct type on bitcode.
Target specific information are type size, type alignment, merged bitfields and so on.
For example
1 struct test {
2 char a:3;
3 char b:4;
4 char c:3;
5 char d:2;
6 };
7
8 struct test vm = {1, 2, 3, 1};
9
10 int main(void)
11 {
12 int a;
13 vm.d = 1;
14 }
Above
2012 Apr 27
2
question of iSCSI pool on the same iSCSI target
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2010 Jan 14
2
Fixed size permutations
I'm using functions to return a matrix of all permutations of a
specified size from a larger list for predictor selection.
For each predictor size I use a seperate function like this:
bag2 <- function(n) {
rl <- c()
for (i1 in seq(n)) {
for (i2 in seq(n)) {
if (length(unique(c(i1,i2)))==1) {next}
rl <- cbind(rl,matrix(c(i1,i2)))
}
}
2010 Jan 27
2
[LLVMdev] -Qunused-arguments
I'm getting a lot of this from make check:
g++: unrecognized option `-Qunused-arguments'
This presumably comes from commit 94666 (test/LLVMC/ExternOptions.td and
other files).
That option is specific to clang, isn't it? Should %compile_cxx be
picking up clang instead of my system's g++?
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2012 Apr 19
3
[LLVMdev] def-use chains and use-def chains
Hi,
I need to find out all the places where the value of a variable is being
used. For this I have to implement reaching definitions(def-use chains).
When I searched for its implementation I found Iterating over def-use &
use-def chains <http://llvm.org/docs/ProgrammersManual.html#iterate_chains>.
will this work for finding the places where a variable is reaching?
I tried to use
2010 Dec 14
2
[LLVMdev] Which is more compact, .bc or .ll.gz? And what might be even more compact?
According to the few tests I did, .ll.gz is more compact:
1.00 LLVM bitcode (.bc)
0.80 Gzipped LLVM bitcode (.bc.gz)
4.13 LLVM assembly (.ll)
0.68 Gzipped LLVM assembly (.ll.gz)
However, there's not much in it, considering that a stripped native binary is about 0.40 on the same scale.
So, seeing as projects such as PNaCl want to send LLVM bitcode over the network, are there any proposed
2010 Oct 19
0
[LLVMdev] Structure memory layout
Hi Jin Gu Kang
> 5 %0 = type { i3, i4, i3, i2 }
each of the above struct fields occupies 1 byte. If you were hoping that an
i3 field would occupy only 3 bits then I am sorry, it doesn't work that way.
Ciao,
Duncan.
2008 Jun 28
2
[LLVMdev] need to store the address of a variable
Hello everybody,
my problem is, that I want to get an array of pointers to all local variables
in a function. This array will be used for transfering these Variables to
another execution engine.
I've code which generates this array, and a pointer to the target field of the
array.
name = variables.fname + "_pointerArray";
Instruction* pointerArray = new
2010 Dec 29
2
subset question
Hi,
I'm having a problem with a step that should be pretty simple.
I have a dataframe, d, with column names : gene s1 s2 s3. The column "gene"
stores an Id; the rest of the columns store intensity data.
I would like to extract the rows for gene Ids i1, i2, i3 ( I know a priori
that those rows exist).
So I do this:
subset(d, gene %in% c(i1, i2, i3)).
This does not give me the
2013 Apr 17
1
Merging big data.frame
Hi all,
I am trying to merge 2 big data.frame. The problem is merge is memory
intensive so R is going out of memory error: cannot allocate vector of size
360.1 Mb. To overcome this, I am exploring option of using data.table
package. But its not helping in term of memory as merge in data.table is
fast but not memory efficient. Similar error is coming.
My inputs are
inp1
V1 V2
1 a i1
2 a i2
3 a
2010 Nov 07
3
Integrate and mapply
Hi,
I need some help on integrating a function that is a vector.
I have a function - vector which each element is different. And,
naturally, function integrate() does not work
I checked the article of U. Ligges and J. Fox (2008) about code
optimization "How Can I Avoid This Loop or Make It Faster?" on
http://promberger.info/files/rnews-vectorvsloops2008.pdf.
Their advice did not help
2014 Aug 04
3
[LLVMdev] LLVM AllocaInst and StoreInst
Hi,
I am trying to write a simple interpreter.
I am trying to generate LLVM IR for assignment operation. The code for the
generation part looks like this
llvm::Value* codeGenSymTab(llvm::LLVMContext& context) {
> printf("\n CodeGen SymTab \n");
> Value *num = ConstantInt::get(Type::getInt64Ty(context), aTable.value,
> true);
> Value *alloc = new
2009 Aug 31
2
interactions and stall or memory shortage
Hello,
After putting together interaction code that worked for a single pair of
interactions, when I try to evaluate two pairs of interactions(
flowers*gopher, flowers*rockiness) my computer runs out of memory, and the
larger desktop I use just doesn't go anywhere after about 20 minutes.
Is it really that big a calculation?
to start:
mle2(minuslogl = Lily_sum$seedlings ~ dnbinom(mu = a,
2010 May 13
2
[LLVMdev] Returning big vectors on ARM broke in rev 103411
I think this test case demonstrates it:
; RUN: llc -march=thumb -mcpu=cortex-a8 -mtriple=thumbv7-eabi -float-abi=hard < %s | FileCheck %s
define <4 x i64> @f_4_i64(<4 x i64> %a, <4 x i64> %b) nounwind {
; CHECK: vadd.i64
%y = add <4 x i64> %a, %b
ret <4 x i64> %y
}
(I hope I got that right.)
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