search for: brinds

Is there any way to add an optional flag edge to a BRIND node? I In the ARM backend I lower returns directly to BRINDs, so I need to add an edge connecting the BRIND and the CopyToReg that sets the return value. The other option is to create an ARM specific node that is identical to BRIND except for having a flag edge. Thanks, Rafael

On Wed, 31 May 2006, [UTF-8] Rafael Esp?ndola wrote: >> We don't want the copy and shift to wander apart from each other (e.g. we >> don't want another shift to get scheduled in between them), so we flag >> them together. In practice, these copies usually get coallesced away. > In the second case shl explicitly uses CL. Shouldn't the register > allocator be

> > Why it is named RETFLAG? > > Historical reason. Originally we didn't have nodes that could > *optionally* have an input flag. A better design, e.g. on PPC would be to > have a PPCISD::RET node, which takes an optional input flag, and always > lower RET to it. I See. I will try to always lower to "(mov)*;bx lr" on ARM. > Flag in the SelectionDAG stuff is

I have changed the way in which the ARM backend generates a function return. Instead of expanding a RET to a CopyToReg;RETFLAG, it now expands into a CopyToReg;BRIND. I haven't commit it yet, but the patch is attached. In my opinion the resulting code is easier to understand, but I have some questions: Why all backends use RETFLAG? Why it is named RETFLAG? Why the Copy that places the

On 5/31/06, Chris Lattner <sabre at nondot.org> wrote: > On Wed, 31 May 2006, [UTF-8] Rafael Esp?ndola wrote: > >> We don't want the copy and shift to wander apart from each other (e.g. we > >> don't want another shift to get scheduled in between them), so we flag > >> them together. In practice, these copies usually get coallesced away. > > In

On Tue, 30 May 2006, [UTF-8] Rafael Esp?ndola wrote: > I have changed the way in which the ARM backend generates a function > return. Instead of expanding a RET to a CopyToReg;RETFLAG, it now > expands into a CopyToReg;BRIND. I haven't commit it yet, but the patch > is attached. Ok, I haven't looked at the code, but you're free to do whatever make sense. > In my

On Tue, Jul 14, 2009 at 6:48 PM, Bob Wilson <bob.wilson at apple.com> wrote: > > On Jul 2, 2009, at 10:48 AM, robert muth wrote: > > I spend over a day trying to follow your suggestion. In the end I was not > successful. Here is what Iearned: > > After setting > > ARMJITInfo::hasCustomJumpTables -> true > setOperationAction for ISD::BR_JT -> Expand >

On Jul 23, 2009, at 12:10 PM, robert muth wrote: > Bob: > > Thanks for cleaning this up. I like the new patch much better than > the old one. > Teaching the (abstract) ConstantValue class about jumptable indices > is a little > bit ugly but I do not see any better solution without massive > refactoring. > I have added TODOs here and elsewhere and plan to address

Hi, I encountered an error while trying to use the indirectbr instruction with Alpha backend (current build). Here's part of the code sequence that I tried to compile: bb1: %1 = load i32* %i, align 4 %2 = add nsw i32 %1, 1 store i32 %2, i32* %i, align 4 indirectbr i8* blockaddress(@main, %bb1), [ label %bb1 ] br label %return This compiles correctly when I use the X86 or PPC

I had some problems adding the address of a jump table to the constant pool. The problem is that the address of a jump table is not a GlobalValue.Currently I decided to expand BRIND so that I can work on simpler problems :-) A small brain dump on the issue: GlobalValues are currently used to represent functions and global variables. Maybe we could also use then for anything that will have a label

On Jul 2, 2009, at 10:48 AM, robert muth wrote: > I spend over a day trying to follow your suggestion. In the end I > was not successful. Here is what Iearned: > > After setting > > ARMJITInfo::hasCustomJumpTables -> true > setOperationAction for ISD::BR_JT -> Expand > > I needed to add a "brind" definition to ARMInstrInfo.td > I picked

On Thu, 2013-08-22 at 11:29 +0400, Alexey Samsonov wrote: > Ah, I've replied in a different thread already. What Dmitri says - If > you're interesting in only building the Clang on x32 host, you may avoid > checking out compiler-rt repo for now. > > compiler-rt does make a convenient compiler test though.. :) fatal error: error in backend: Cannot select: 0x30ccf38: ch =

On Thu, Jun 25, 2009 at 6:17 PM, Bob Wilson <bob.wilson at apple.com> wrote: > Hi Robert, > Evan asked me to review this patch, and I have some questions about it. I > apologize for not following the discussion earlier and for hitting you with > questions after you've already gone through several revisions. > > LLVM provides some default behavior for handling jump

Ah, I've replied in a different thread already. What Dmitri says - If you're interesting in only building the Clang on x32 host, you may avoid checking out compiler-rt repo for now. On Thu, Aug 22, 2013 at 10:59 AM, Dmitri Gribenko <gribozavr at gmail.com>wrote: > On Wed, Aug 21, 2013 at 11:04 PM, Steven Newbury <steve at snewbury.org.uk> > wrote: > > I've

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I have just added a retflag to the ARM backend. I thought that using BRIND directly was to blame for a dummy move. But I the move wasn't removed. When compiling --------------------------------------- int %g() { entry: call void %f( ) ret int 42 } declare void %f() -------------------------------------- The ARM backend produces ------------------------------------------- g:

Hi R, Wanted to check if there are any packages available for getting the (x,y) data points of a graph or a plot, which is in the image format. Say, the plot could be a published report, and I want to get the points of the curve plotted. (I am speaking something related the subject discussed in http://www.uniphiz.com/digitizing.htm) Thanks, Shubha This e-mail may contain

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RegScavenger is complaining about use of an undefined register, CTR8, in the BCTR8 instruction, in the following instance (this is from the PPC backend): BB#38: derived from LLVM BB %for.end50 Predecessors according to CFG: BB#36 %X3<def> = LD 0, <fi#27>; mem:LD8[FixedStack27] %X4<def> = RLDICR %X3<kill>, 3, 60 %X5<def> = LI8

Hi Robert, Evan asked me to review this patch, and I have some questions about it. I apologize for not following the discussion earlier and for hitting you with questions after you've already gone through several revisions. LLVM provides some default behavior for handling jump tables, with the tables emitted separately from the code that uses them. The ARM backend provides its