similar to: Preserving Call to Intrinsic function

<table cellspacing='0' cellpadding='0' border='0' ><tr><td style='font: inherit;'>Hi,<br>I tried creating intrinsics which are to be<br>placeholders for a set of instructions (actually a section of a basic block) to be executed elsewhere(for e.g. in HW).<br>These intrinsics are to take care of the data dependencies of the set of

Hi, All, Suppose I define one memory read only intrinsic function "foo" in Intrinsics.td like this def int_foo : Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty], [IntrReadMem]>; Suppose I have the following IR, which means the intrinsic function "foo" is called 10 times in a loop. Since the parameters of function "foo" are invariant and the function

Hello, LLVM's intrinsic overloading mechanism does not currently support overloading on pointer types. Patches to implement this would be welcome. Dan On May 7, 2008, at 9:25 AM, aditya vishnubhotla wrote: > Hi, > I tried creating intrinsics which are to be > placeholders for a set of instructions (actually a section of a > basic block) to be executed elsewhere(for e.g. in

Thanks for your reply, escha, Yes, -loop-rorate makes it work. Regards, Xiangyang 2015-12-01 12:48 GMT-05:00 <escha at apple.com>: > > > On Dec 1, 2015, at 9:30 AM, Xiangyang Guo via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > > > Hi, All, > > > > Suppose I define one memory read only intrinsic function "foo" in >

So I removed the 'tail' from the call and try out different properties: - IntrNoMem: memset() and the intrinsic are both optimized away as expected - IntrWriteMem: memset() optimized away by DSE but the intrinsic isn't. I would expect both to be removed, since the intrinsic is now also a dead store. - IntrReadMem: memset() and the intrinsic are both optimized away *unexpectedly* (CSE

Hi list, I happened to read below thread (written in 3 years ago). I think I may need this ReadAdvance feature to work with my ARCH. It is about the scheduler info which describes reading my ARCH's vector register. There are different latencies since forwarding/bypass appears. I give it as below example: def : WriteRes<WriteVector, [MyArchVALU]> { let Latency = 6; } ... def

Hi ES, From what I understand instruction parsing is divided into two parts: - Parsing an operand list (XXXAsmParser::ParseInstruction) - Turning the operand list into an actual instruction (XXXAsmParser::MatchAndEmitInstruction) The second part does the validation (e.g. how many operands, what kind, etc) while the first part only does the parsing. That's why I think in the first part

Thanks Andrew. I have tried with recent tblgen, ReadAdvance would not work for multiple latencies. Maybe I should make improvement into tblgen if Pierre-Andre does not have the change anymore. However, I just a little curious about the situation I met. The hardware forwording may fail for different reasons, which different register read may have different latencies, depending both on the register

On Mar 4, 2014, at 10:05 AM, Pete Cooper <peter_cooper at apple.com> wrote: > > On Mar 3, 2014, at 2:21 PM, Andrew Trick <atrick at apple.com> wrote: > >> >> On Mar 3, 2014, at 8:53 AM, Pierre-Andre Saulais <pierre-andre at codeplay.com> wrote: >> >>> Hi Andrew, >>> >>> We are currently using a custom model where

It does not work. I have tried to use the latest master today. But tblgen still give me information like error: Resources are defined for both SchedRead and its alias on processor MyArchModel def : ReadAdvance<MyReadVector, 3, [MyWriteAddVector]>; ^ Unless I change "MyReadVector" to another read like "MyReadVector1", it would not work. Debugging into tblgen, there is

On Mar 3, 2014, at 8:53 AM, Pierre-Andre Saulais <pierre-andre at codeplay.com> wrote: > Hi Andrew, > > We are currently using a custom model where scheduling information is attached to each MCInstrDesc through tablegen, and we're trying to move to one of LLVM's models. > > To expand on what JinGu mentioned, our target has explicit ports that are used to read and

On Feb 19, 2014, at 1:54 PM, jingu <jingu at codeplay.com> wrote: > Hi Andy, > > I am trying to schedule and packetize instructions for VLIW at post-RA > stage or final codegen stage, where code transformations are not allowed > any more, because hardware can not resolve resource conflict. There is a > simple example as following: > > ADD dest_reg1, src_reg1,

Hi, Thank You for the advice and we were able to solve that problem by the following modifications to the Instrinsics.td file. But I now have an "Invalid Intrinsic name" error This error occurs presumably because the created intrinsic is named: llvm.migrate_begin.i32 Intrinsics.gen checks for a string length of 18 (i.e. the length without the .i32). Kindly help me through it.

Hi, I tried creating variable argument intrinsics which are to be placeholders for some instructions which should not be executed by the backend. Kindly help me with the errors in my "migrate_begin" intrinsic creation //Additions made to Intrinsics.td file: def llvm_migrate_begin : LLVMType<iAny>; def int_migrate_begin :

On Feb 19, 2008, at 1:11 AM, aditya vishnubhotla wrote: > Hi, > I tried creating variable argument intrinsics which > are to be placeholders for some instructions which > should not be executed by the backend. > > Kindly help me with the errors in my "migrate_begin" > intrinsic creation > > //Additions made to Intrinsics.td file: > > def

Nothing... I'll show you all the info related to: The intrinsic: def int_soru_sre : Intrinsic<[llvm_void_ty, llvm_i32_ty], [IntrWriteMem]>; The lower instruction (in MIPS): class SORUI<bits<6> op, dag outs, dag ins, string asmstr, list<dag> pattern, InstrItinClass itin>: FI<op, outs, ins, asmstr, pattern, itin> { let isBarrier = 1; // or call,

Hello, Julio > These later things are ignored, I don't know if when the intrinsic is > lowered, then it doesn't matter (or perhaps the reorder is made > before). What is the description of the instruction you're lowering intrinsic into? Have you looked for the instruction flags defined in Target.td file? You instruction should definitely have "isBarrier" flag set.

Here is the code <https://github.com/llvm-mirror/llvm/blob/c68dcdb413079d92118839dbd835e125293f411a/include/llvm/MC/MCInstrItineraries.h#L75> for InstrStage::getUnits() /// \brief Returns the choice of FUs. unsigned getUnits() const { return Units_; } This method returns an integer. How does one interpret it? As far as I see it it should tell me what resources are used by a given stage but

Hello, I have an intrinsic that matches to a asm instruction directly. This intrinsic starts a coprocessor that can do anything. If I put another instruction next to it (a multiplication for example), the "llc" reorders and puts the intrinsic after the multiplication. I have tried all: - Setting the instruction like if it takes 256 cycles or 0 cycles. - Setting the instruction with

Hello, I just started using the GlobalISel framework. Is there a way to emit all intermediate invariants from IRTranslator to Instrution-Selection in a single instruction? It will be really handy. I mean something like '-save-temps' in clang. Best regards, Kumail Ahmed -------------- next part -------------- An HTML attachment was scrubbed... URL: