similar to: [LLVMdev] Variable names of arguments to call functions

Frank, It looks like the loop vectorizer is unable to tell that the two stores in your code never overlap. This is probably because of the sign-extend in your code. Can you extend the indices to 64bit ? Thanks, Nadav On Oct 28, 2013, at 1:38 PM, Frank Winter <fwinter at jlab.org> wrote: > Verifying function > running passes ... > LV: Checking a loop in "bar" > LV:

Verifying function running passes ... LV: Checking a loop in "bar" LV: Found a loop: L0 LV: Found an induction variable. LV: We need to do 0 pointer comparisons. LV: Checking memory dependencies LV: Bad stride - Not an AddRecExpr pointer %13 = getelementptr float* %arg2, i32 %1 SCEV: ((4 * (sext i32 {(256 + %arg0),+,1}<nw><%L0> to i64)) + %arg2) LV: Src Scev: {((4 * (sext

Dear all, Hi! Recently, I notice a situation where I cannot infer the size of the outermost dimension of array in the function interface. To concretely depict the problem, I show the C source code and the generated IR code at the end. The array size of A[] is 51 but this information is lost in the generated IR. How can I maintain such information in IR? Should I set some argument for

In the case when coming from C it was probably the loop unroller and SLP vectorizer which vectorized the code. Potentially I could do the same in the IR. However, the loop body that is generated in the IR can get very large. Thus, the loop unroller will refuse to unroll the loop in a large number of (important) cases. Isn't there a way to convince the loop vectorizer that it should

It works, thank you, Andy. On Thu, Jun 20, 2013 at 12:45 AM, Andrew Trick <atrick at apple.com> wrote: > > On Jun 19, 2013, at 1:04 AM, Eric Lu <eirc.lew at gmail.com> wrote: > > It seems the options still does not work, or I have misunderstood what you > said. > > The command: > clang -g -I/home/lxj/software/llvmsvn/include -emit-llvm $1.c -c -o > $1.bc

I am trying a setup where the one loop is rewritten as two loops. This avoids the 'rem' and 'div' instructions in the index calculation (which give the loop vectorizer a hard time). However, with this setup the loop vectorizer complains about a too small loop. LV: Checking a loop in "main" LV: Found a loop: L3 LV: Found a loop with a very small trip count. This loop

Dear David, Thanks for your prompt reply! Sure, I can implement a AST visitor to go through the AST to get the information but I just wonder whether there is any other way to let Clang do so. What I am considering is how to let the generated IR looks like below, which some tools realize: define dso_local i32 @_Z1fPii([51 x i32]* %A, i32 %x) local_unnamed_addr #0 !dbg !7 { entry: ...

Dear R community, I am struggling a bit with a probably fairly simple task. I need to use some already existing functions as argument for a new function that I am going to create. 'dataset' is an argument, and it comprises objects named 'mean_test', 'sd_test', 'kurt_test' and so on. 'arg1' tells what object I want (mean, sd, kurt) while 'arg2' tells

Hi Gerolf, I think we have several (perhaps separable) issues here: 1. Do we have a canonical form for loops, preserved through the optimizer, that allows naturally-constructed loop nests to remain separable? 2. Do we forbid non-lowering transformations that turn vectorizable loops into non-vectorizable loops? 3. How do we detect cases where transformations cause a negative answer to either

Good morning to everyone: So weird!! I got a method called apply_settings(arg1, arg2) in the controller to be tested. In the controller spec, I of course called the method. In the controller: def apply_settings(arg1, arg2) #where arg1 is a hash, and arg2 is an array of object #do some coding end In the controller spec: before(:each) do @controller = Controller.new

Hi, I have a bunch of R scripts which have the hash bang !/usr/bin/env Rscript and I typically run these scripts by passing in some parameters like this: ./nameOfRScript arg1 arg2 ... I know Rscript has the option to run in --vanilla. Where exactly do I insert the --vanilla option? When I do something like this: ./nameOfRScript --vanilla arg1 arg2 ... And I try to access the commandArgs,

Replace all the open-coded macros for generating calls with a pair of more general macros (__PVOP_CALL/VCALL), and redefine all the PVOP_V?CALL[0-4] in terms of them. [ Andrew, Andi: this should slot in immediately after "Document asm-i386/paravirt.h" (paravirt_ops-document-asm-i386-paravirth.patch) ] Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Ingo Molnar

Replace all the open-coded macros for generating calls with a pair of more general macros (__PVOP_CALL/VCALL), and redefine all the PVOP_V?CALL[0-4] in terms of them. [ Andrew, Andi: this should slot in immediately after "Document asm-i386/paravirt.h" (paravirt_ops-document-asm-i386-paravirth.patch) ] Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Ingo Molnar

The loads, stores and float arithmetic in attached function should be completely vectorizable. The bb-vectorizer does a good job at first, but from instruction %96 on it messes up by adding unnecessary vectorshuffles. (The function was designed so that no shuffle would be needed in order to vectorize it). I tested this with llvm 3.6 with the following command:

I seem to have problem to get the SLP vectorizer to make use of the full 8 floats available in a SIMD vector on a Sandy Bridge CPU with AVX. The function is attached, the CPU flags are: flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good

Hello R-helpers, I'm trying to add labels to points in xyplot graphs, but I want lo label only those points which have a certain level of my grouping variable, and have encountered a few problems. An example dataframe that goes with the following code is at the end of this message. 1st step, adding labels (from another column in the dataframe) to my chosen points : I've figures this

Hello, I'm running microfocus acuthin.exe with wine. The program crashes every time i do a certain action involving a grid element in cobol. I'm no programmer, can't understand what the debugger is trying to say. Can anyone make sense of it? Can I replace a dll or something? Or configure wine? Please ask questions if something is missing. Thanks in advance: Here's the info wine

Hi, I am trying to insert a system() call right after the call to Voicemail() in order to notify people that they have received new voicemail. (In case you are interested, I was following the tips here, but I have had to change a few things: http://www.voip-info.org/wiki-Asterisk+tips+callback ). My setup works when someone leaving a message hits # to exit the voicemail after speaking, or

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Up until today, I have had no issues with receiving faxes in *. One change I made was that I now have the incoming

Hi, I have a situation where a DTrace script is printing out extra characters, despite the copyin() call giving a specific length. Can anyone think of why this might be? It''s fine the first time all of the probes fire, but on a second run of my generating operations, I get junk in there. For example: set setop length 5, FOUND KEY, STORED set setop length 5, FOUND KEY, STORED get