similar to: [LLVMdev] Linear scan is now the default register allocator

On Thu, 21 Dec 2006, Roman Levenstein wrote: > following: > 1) some of the fixed registers intervals are merged with some virtual > registers intervals > 2) later there is a need to spill one of the allocated registers, but > since all joined intervals are FIXED intervals now due to (1), they > cannot be spilled. Therefore, the register allocator loops for ever. > > I would

On Sun, 28 Dec 2003, Anshu Dasgupta wrote: > CodeGen/RegAlloc/PhysRegAlloc.cpp implements a graph coloring register > allocator for the Sparc back end. It requests target machine register > information via a call to getRegInfo() which returns a class > TargetRegInfo containing the required information. For the x86 target > machine, this interface has not been implemented. Is an

--- Chris Lattner <sabre at nondot.org> wrote: > On Thu, 21 Dec 2006, Roman Levenstein wrote: > > following: > > 1) some of the fixed registers intervals are merged with some > virtual > > registers intervals > > 2) later there is a need to spill one of the allocated registers, > but > > since all joined intervals are FIXED intervals now due to (1),

News flash: LLVM 1.2 is now available! -------------------------------------- LLVM 1.2 is the result of ~3 months of hard work by many people in the LLVM community. It contains a bunch of new features, produces substantially better code, and has many bug fixes over the 1.1 release. A detailed list of new and improved features are included in the 1.2 release notes:

News flash: LLVM 1.2 is now available! -------------------------------------- LLVM 1.2 is the result of ~3 months of hard work by many people in the LLVM community. It contains a bunch of new features, produces substantially better code, and has many bug fixes over the 1.1 release. A detailed list of new and improved features are included in the 1.2 release notes:

On Mon, 26 Apr 2004, Finn S Andersen wrote: > Alkis Evlogimenos wrote: > > >Is there a chance you can try cvs? I would be interested to > >get a simplified test case where the allocator breaks. A lot of > >improvements went into the x86 backend since 1.2 and we currently have > >no test cases where the allocator breaks today. > I updated and recompiled and the

Hi everyone, Quick summary: LLVM now has a new register allocator particularly suitable for compiling (very) large, machine-generated functions. Longer story: I've recently been using LLVM in an application that involves JITing fairly large functions that have no control flow - they're just flat sequences of instructions, anywhere from 100 to 10000+ in size. (The control flow is

Hi, I was working on extending soft-float support for handling expansion of i64 and f64 into i16, i.e. on supporting the expansion of long values of illegal types into more then two parts. For that I modified SelectionDAGLowering::getValue() and several other functions. This seems to work now on my test-cases, but while testing it I ran into a different problem. I have the impression that I

I will be removing RegAllocLinearScan and VirtRegRewriter from trunk shortly after we cut the 3.0 release branch. LLVM 3.0 will still ship with the linear scan register allocator, but the default will be the new greedy allocator. Linear scan can be enabled by passing '-regalloc=linearscan -join-physregs' to llc. RegAllocLinearScan and VirtRegRewriter need to go away soon because they

> Hi! > > I developed a register allocator within LLVM and now I need to test its > efficiency. Can I do this using llvm-test package? > Do llvm tests check all available regalloc options automatically? If not, > then what modifications should I do to the test files? > It would be great if I could test my algo along with linearscan and compare > the results. > >

Hi Duraid, > Hi everyone, > > Quick summary: > > LLVM now has a new register allocator particularly suitable for > compiling (very) large, machine-generated functions. Congrats! Very good job! > Longer story: > > I've recently been using LLVM in an application that involves JITing > > fairly large functions that have no control flow - they're

Alkis Evlogimenos wrote: >Is there a chance you can try cvs? I would be interested to >get a simplified test case where the allocator breaks. A lot of >improvements went into the x86 backend since 1.2 and we currently have >no test cases where the allocator breaks today. > > I updated and recompiled and the error is still there. It turns out that I cannot use the bugpoint

Hi,   We were using "linearscan" register scan with llc -O0 option. As per the llvm blog, this is replaced with greedy register alloation. http://blog.llvm.org/2011/09/greedy-register-allocation-in-llvm-30.html   But I think, this register allocation (i.e. 'greedy and 'basic') is blocked if used with -O0 option of llc. Only 'fast register allocator' option can be used

Hi again! I've managed to run the llvm-test with the options Fernando told. What I did was the following: I changed llc regalloc option in TEST.llc.makefile to my allocator. I changed LLCBETAOPTION in makefile.programs file for all architechtures to use my allocator. I run make TEST=nightly report.html and got all tests under LLCBETA failed ('*' symbol). Though I know that my

On May 3, 2011, at 3:24 PM, David A. Greene wrote: > Jakob Stoklund Olesen <stoklund at 2pi.dk> writes: > >> On May 3, 2011, at 12:03 PM, David A. Greene wrote: > >>> Certainly. I would ask that we keep linearscan around, if possible, as >>> long as there are significant regressions like this. Our customers tend >>> to really, really care about

On 4/3/07, David Greene <greened at obbligato.org> wrote: > > Toward a better register allocator, I'm attempting to understand > the dataflow information available to the allocator. > > What's the difference between LiveInterval information and LiveVariable > information? If a LiveInterval is based on a linear ordering of > the machine instructions, isn't it

> > If the test output claims that llc-beta fails, then your register > allocator is producing incorrect code. Ok, I run make TEST=llc report.html with default allocator, not mine. Why LLCBETAOPTION for X86 is local, not linearscan? I've got some tests having * in some columns (for example, in column with register spills count). Does it mean that the test failed? Thanks.

Hi! I developed a register allocator within LLVM and now I need to test its efficiency. Can I do this using llvm-test package? Do llvm tests check all available regalloc options automatically? If not, then what modifications should I do to the test files? It would be great if I could test my algo along with linearscan and compare the results. Thanks. Tony. -- "Nae king! Nae quin! Nae

On 25 Aug 2010, at 02:04, Silvio Ricardo Cordeiro wrote: > On Sun, Aug 15, 2010 at 10:04 PM, Jakob Stoklund Olesen <stoklund at 2pi.dk> wrote: > > On Aug 15, 2010, at 5:12 PM, Silvio Ricardo Cordeiro wrote: > > > Is there a way for me to collect statistics about the number of loads/stores added by the "linearscan" register allocator (just like can be done with

On Fri, 2004-08-27 at 08:05, Vladimir Prus wrote: > Hello, > I'm getting an assertion in register allocator, specifically in > LiveIntervalAnalysis.h, method LiveIntervals::getInstructionIndex: > > unsigned getInstructionIndex(MachineInstr* instr) const { > Mi2IndexMap::const_iterator it = mi2iMap_.find(instr); > assert(it != mi2iMap_.end() &&