similar to: [LLVMdev] Flag operands and load/store DAG nodes

On Nov 17, 2008, at 11:12 AM, Burke, Max wrote: > I notice that many DAG nodes like the copy-to-register operation have > the ability to take an optional flag parameter, but that the load/ > store > nodes do not (at least as of 2.3). Is it possible to pass flag > operands > through load/store DAG nodes? No there isn't. What are you trying to accomplish? Are you trying to

Dear LLVM developers: How do you create a load node with flag input and output? I need to schedule a load instruction right after one instruction and right before another (for correctness). I am looking for an overloaded version of SelectionDAG::getLoad. I think a similar question has been asked before but I don't know whether it has been resolved.

Hi, I'm recently trying to investigate ppc_fp128 related problem. Here is a minimal C++ test case that seems wrongly compiled: long double id(long double a) { return a; } bool f(long double x) { return id(__builtin_fabsl(x)) >= 0; } int main() { if (f(-123.l)) { return 0; } return 1; } The program compiled with command: clang++ -static -target powerpc64le-linux-gnu bad.cc

On Mon, Nov 30, 2015 at 7:24 PM Gao, Yunzhong < yunzhong_gao at playstation.sony.com> wrote: > According to > http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi.html, > "The high-order double-precision value (the one that comes first in > storage) must have the larger magnitude." > > So the order of the two doubles in your fp128 is not affected by the

(Resending with the correct mailing list address.) Hi, Currently test/asan/TestCases/alloca_vla_interact.cc is XFAILed for powerpc64. I've had a look at why it doesn't work. I think the only problem is in the call to __asan_allocas_unpoison that is inserted at the end of the "for" loop (just before a stackrestore instruction). The call function is created something like this

Hello, Edmund, > Is it, or should it be legal for a Flag output to be used as input by > more than one other node? It's illegal. Multiple uses of the flag output do not make any sense, this breaks the semantics of flag operands. -- With best regards, Anton Korobeynikov Faculty of Mathematics and Mechanics, Saint Petersburg State University

I recently filed this bug: http://llvm.org/bugs/show_bug.cgi?id=8323 It's a dodgy one because you have to patch LLVM to demonstrate it. I suspect that the cause of the problem in that "bug" is that the peephole optimisation in PerformDAGCombine results in a Flag output from one node being used as input by two other nodes in the DAG, and the scheduler then can't cope with that.

Anton Korobeynikov: > > Is it, or should it be legal for a Flag output to be used as input by > > more than one other node? > It's illegal. Multiple uses of the flag output do not make any sense, > this breaks the semantics of flag operands. All right. Then what should the Selection DAG look like in a case where the flag value generated by one instruction is to be used as

Hi, Two-address instructions are represented as normal three-address instructions with a Desc bit that indicates the first two operands are tied together. The question is, should the second operand have a <kill> flag? a: %R0<def> = MUL %R0, %R1<kill> b: %R0<def> = MUL %R0<kill>, %R1<kill> I think the current policy is a: There should be no kill-flag.

On Jul 14, 2009, at 12:10 PM, Jakob Stoklund Olesen wrote: > Hi, > > Two-address instructions are represented as normal three-address > instructions with a Desc bit that indicates the first two operands are > tied together. The question is, should the second operand have a > <kill> flag? > > a: %R0<def> = MUL %R0, %R1<kill> > b: %R0<def> = MUL

I'm trying to implement *MUL_LOHI for my processor. My processor has mulxss (e.g.) that gives the 32 high bits of a 64 bit multiply. I tried this in ios2ISelDAGToDAG.cpp: /// Mul/Div with two results case ISD::SMUL_LOHI: case ISD::UMUL_LOHI: { SDValue Op1 = Node->getOperand(0); SDValue Op2 = Node->getOperand(1); AddToISelQueue(Op1);

Hi, I am trying to write a CUDA memory instrumentation code. So far I have made little progress, please see attached file. In lines 82 and 88 I get error as: ‘LoadOperand’ is not captured and ‘StoreOperand’ is not captured Unfortunately, I am not able to tell if the error is generic C++ or LLVM related. Earlier I had verified the "syntax" of such code in a dummy C++ implementation,

Hi, I'm trying to complete the lowering for a new microcontroller. I'm using LLVM 3.8. For now this lowering crashes on 'Store' node, which is actually not yet defined. I've tried to map the ISel 'Store' node to architecture specific instructions. I've define the following semantic to my architecture specific instructions: def MOVSUTO_SU_rr :

Hi Rafael, I've been staring at the CFI directives and have a question. Some background: I want to generate the compact unwind information using just the CFI directives. I *think* that this should be doable. The issue I'm facing right now is that I need to know how much the stack pointer was adjusted. So when I have something like this: .cfi_startproc Lfunc_begin175:

I have a platform that I am targeting that has 64-bit general purpose registers but uses 32-bit pointers (ie, sizeof(void*) == 4) but unfortunately it also requires that the top 32-bits of the pointer value be clear. This sometimes becomes a problem with certain pointer calculations such as using a 32-bit negative value for indexing into an array can cause the upper bits to be set, generating

Hi, I am interested to know the maximum number of resource pools that allow in Xen Cloud Platform. I cannot find any maximum number indicated in the documentation. Thank you, Wong Fui Fui _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

Good day. We trying to test XCP cloud under some product-like load (4 hosts, each with 24Gb mem and 8 cores) But with just about 30-40 virtual machines I got an extreme load on dom0 on pool master host: LA is about 3.5-6, and most time are used by xapi and stunnel processes. It''s really bother me: what happens on higher load with few thousands of VMs with about 10-16 hosts in pool...

On 5 September 2013 19:27, Bill Wendling <wendling at apple.com> wrote: > Hi Rafael, > > I've been staring at the CFI directives and have a question. Some background: I want to generate the compact unwind information using just the CFI directives. I *think* that this should be doable. The issue I'm facing right now is that I need to know how much the stack pointer was

I am trying to use the value of an ID variable in an if statement and not getting the results I expected. # ID values for two school districts > with(rf, tapply(DistrictID, DistrictName, min) ) Aberdeen School Dist. # 58 Buhl Joint School District 59340 53409 This creates DNAME as I expected ...

xe vm-start vm=debian Your license has expired. Please contact your support representative. Network and Management Interface XCP 0.5.900-36486c I was seriously under the impression we fixed this, now all my images are offline is there any way to fix this without reinstalling everything ? _______________________________________________ Xen-users mailing list