similar to: [LLVMdev] Alternate instruction sequences

Hi, I am compiling Xen from source on FC9. On booting the Xen dom0 kernel it gives the following error: Volume group "VolGroup00" not found and ultimately the error that switchroot: mount failed: No such file or directory So my question is that why it fails to detect logical volumes? Thanks, Abdul Qadeer _______________________________________________ Xen-users mailing list

On Wed, 09 Nov 2011 09:27:30 -0800, Devang Patel wrote: > On Nov 9, 2011, at 12:52 AM, cafxx wrote: > >> I was wondering, is there any way to express in the IR that an >> instruction/instruction sequence/basic >> block/region/function/module/whatever is an alternate version of >> another? > > There is not a way to represent --- instruction I1 is an alternative

A more pressing need is a pre-regalloc scheduler that can switch modes to balance reducing latency vs. reducing register pressure. The problem is the current approach is the scheduler is locked into one mode or the other. For x86, it generally makes sense to schedule for low register pressure. That is, until you are dealing with a block that are explicitly SSE code in 64-bit mode. In that case,

On Nov 9, 2011, at 12:52 AM, cafxx wrote: > I was wondering, is there any way to express in the IR that an > instruction/instruction sequence/basic > block/region/function/module/whatever is an alternate version of > another? There is not a way to represent --- instruction I1 is an alternative for instruction I2 --- in LLVM IR. - Devang > e.g. let's keep things simple and

Thanks for the response. Should I create a small prototype of equality saturation as an LLVM pass so that there can be some concrete discussion on this? I'd love pointers. Thanks, Siddharth On Wed 6 Sep, 2017, 23:35 John Regehr via llvm-dev <llvm-dev at lists.llvm.org> wrote: > Equality saturation is very cool work and Ross Tate mentioned to me that > he'd be happy to chat

> Try building with "make VERBOSE=1", which will show you the > command-lines passed to the compiler/linker. Post the output here. there you go: > cafxx at ubuntu:~/Projects/llvm2/lib/Transforms/cgf$ make VERBOSE=1 > llvm[0]: Compiling CGFPass.cpp for Debug+Asserts build (PIC) > if g++ -I/home/cafxx/Projects/llvm2/include >

> Looks like your shared library is not being compiled with symbols. > Did you verify that your sources are compiled with -g? I think so, this is the makefile (based on the one in the Hello pass): > LEVEL = ../../.. > LIBRARYNAME = CGF > LOADABLE_MODULE = 1 > USEDLIBS = > > ifneq ($(REQUIRES_RTTI), 1) > ifneq ($(REQUIRES_EH), 1) > EXPORTED_SYMBOL_FILE =

On Jun 24, 2011, at 10:34 AM, Carlo Alberto Ferraris wrote: > >> Looks like your shared library is not being compiled with symbols. Did you verify that your sources are compiled with -g? > I think so, this is the makefile (based on the one in the Hello pass): >> LEVEL = ../../.. >> LIBRARYNAME = CGF >> LOADABLE_MODULE = 1 >> USEDLIBS = >> >>

On Thu, Feb 04, 2010 at 13:59:08 -0800, Evan Cheng wrote: > A more pressing need is a pre-regalloc scheduler that can switch modes to > balance reducing latency vs. reducing register pressure. Right. I'm actually working on implementing a variant of IPS (Goodman and Hsu, Code scheduling and register allocation in large basic blocks, http://doi.acm.org/10.1145/55364.55407) based on the

I've read that LiveValues has been removed from trunk. Did it bitrot or was simply removed because a replacement is available? If it's the former, what caused the bitrotting? If it's the latter, what's the replacement? (I've found LiveVariables but I'm not sure it can be used in a ModulePass). b.r. -- Carlo Alberto Ferraris <cafxx at strayorange.com <mailto:cafxx

On Feb 5, 2010, at 2:01 AM, Gergö Barany wrote: > On Thu, Feb 04, 2010 at 13:59:08 -0800, Evan Cheng wrote: >> A more pressing need is a pre-regalloc scheduler that can switch modes to >> balance reducing latency vs. reducing register pressure. > > Right. I'm actually working on implementing a variant of IPS (Goodman and > Hsu, Code scheduling and register allocation

> That's a weird one. Does addr2line work? > $ addr2line -e CGF.so <address> cafxx at ubuntu:~/Projects/llvm2/Debug+Asserts/bin$ objdump -t ../lib/CGF.so | grep flatten 0000000000005622 l F .text 0000000000000aa6 _ZN12_GLOBAL__N_111CGFFunction7flattenEv 00000000000041d6 l F .text 000000000000049c _ZN12_GLOBAL__N_111CGFCallSite7flattenEv

LiveVariables is the optimized and tested way to get variable liveness information (it's used by register allocation). Unfortunately it requires a MachineFunction to work - so you'll either need to lower to one of the built-in targets or add your own target to acquire access to this pass. Andrew On 03/31/2011 12:28 PM, Carlo Alberto Ferraris wrote: > I've read that LiveValues

> Are you loading the shared library directly from the build directory, > or are you installing it first? I'm invoking it directly, I guess:./opt -load=CGF.so -cgf -debug test.S should I install it? (I have no idea about how to do it, though...) > If you run "file CGF.so" on the file you actually load, does it say it > is stripped or non-stripped? cafxx at

I'm trying to figure out how to feed a blockaddress to a switch condition AND destination (basically emulating an indirectbr via a switch; I know it's not a good approach, I'm just experimenting). Suppose I have the following: SwitchInst *s = SwitchInst::Create(...); BasicBlock *bb = ...; PtrToIntInst k = new PtrToIntInst(BlockAddress::get(bb), <TYPE>, "", s);

Nella citazione martedì 2 agosto 2011 20:02:08, Michael Ilseman ha scritto: > I'm assuming that you're talking about a situation where this can't be > determined statically in the existing LLVM IR, but you know it's true > and want to put it in (e.g. you're the one generating LLVM IR). Correct. Or, more precisely, I'd like to investigate macro compression, i.e.

Consider this IR fragment produced after -O3: > %7: > %8 = phi i8* [ blockaddress(@0, %19), %19 ], [ %12, %11 ] > %9 = phi i32 [ %20, %19 ], [ 0, %11 ] > indirectbr i8* %8, [label %4, label %19] > > %19: > %20 = add nsw i32 %9, 1 > %21 = icmp eq i32 %9, 9999 > br i1 %21, label %16, label %7 the br in %19 should be optimized to branch directly to itself rather than going

On Jun 24, 2011, at 11:03 AM, Carlo Alberto Ferraris wrote: > >> Are you loading the shared library directly from the build directory, or are you installing it first? > I'm invoking it directly, I guess: ./opt -load=CGF.so -cgf -debug test.S > should I install it? (I have no idea about how to do it, though...) > >> If you run "file CGF.so" on the file

On Jun 24, 2011, at 10:49 AM, Carlo Alberto Ferraris wrote: > >> Try building with "make VERBOSE=1", which will show you the command-lines passed to the compiler/linker. Post the output here. > there you go: >> cafxx at ubuntu:~/Projects/llvm2/lib/Transforms/cgf$ make VERBOSE=1 >> llvm[0]: Compiling CGFPass.cpp for Debug+Asserts build (PIC) >> if g++

I'm working on a pass (both LLVM and the pass have been compiled in debug+asserts mode) but when the pass crashes in the stack trace printed by opt the names of the functions inside my pass don't appear (see frames 14-16). How can I have them displayed? > cafxx at ubuntu:~/Projects/llvm2/Debug+Asserts/bin$ clear && ./opt > -load=CGF.so -cgf -debug test.S > [...] >