similar to: Understand if a condition was true or false

Hi all, I'm trying to print to screen the value read by the fread function. I'm at the point where source refers to the GetElementPtrInst ( pointer to the buffer where fread stored the data - %5 in my case ) and the fread() has been already called. I thought the correct approach to achieve what I need was: ExecutionContext& SF = ECStack.back(); GenericValue SRC =

Eli, Thanks for responding. Yes, I read the error message but it seems odd that it would be trying to use more than 64 bits. It compiles and executes in gcc on 32 bit arch just fine. I'll probably take your suggestion and file a bug with a reduced testcase. Thanks again, Ryan On Fri, Nov 16, 2012 at 3:10 PM, Eli Friedman <eli.friedman at gmail.com>wrote: > On Fri, Nov 16, 2012

Hi all, This seems like a dumb question but while setting up a pattern in TD file, I got stuck on trying to get each half of an immediate as the half-sized type (ie. i64 imm -> pair of i32 imm's). Is there an existing way to do it? I've tried the 'EXTRACT_SUBREG' but that seems to error at the end of scheduling. Looking at Target.td, I'm not sure which opcode is meant

David, sorry for this email but I noticed I made a mistake in the previous one. So I managed to compile llvm Debug with asserts release. I have used the following commands: cmake -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_ENABLE_RTTI=ON -DLLVM_ENABLE_FFI=ON -DCMAKE_BUILD_TYPE=Debug -DLLVM_ENABLE_ASSERTIONS=ON .. cmake --build . -- -j8 && sudo cmake --build . --target install Once lli was

> > Hey Lang - does any of this look familiar to you? I'm afraid not: I know nothing about the interpreter. As far as I'm aware it's essentially abandonware. Alberto: The usual recommendation in these circumstances is to use a JIT class instead of the interpreter. You're using -force-interpreter though, so I assume you really want to use the interpreter for your use case?

Was hoping it might get some help or a better explanation of this: /ADT/APInt.h:1217: uint64_t llvm::APInt::getZExtValue() const: Assertion `getActiveBits() <= 64 && "Too many bits for uint64_t"' failed. Program received signal SIGABRT, Aborted. 0x00007ffff6eb4d05 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64 64

Sir I am trying to get the constant 2 in instruction y=x+2; Its intermediate representaton is like %y=add nsw i32 %x , 2 If I use getOperand(2).getName() then I get null string. How can I get the value 2 ? Regards Rahul Goyal -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20100623/21222621/attachment.html>

Hi Kevin, To get some portion of a constant immediate you can use SDNodeXForms to transform constant SDNodes into other values. For a worked example, in the MIPS backend we use this for constant synthesis by materializing the value into a register: (From lib/Target/MipsInstrInfo.td): // Transformation Function - get the lower 16 bits. def LO16 : SDNodeXForm<imm, [{ return getImm(N,

Hi all In unittests/ADT/APIntTest.cpp I came across this test: // XFAIL this test on FreeBSD where the system gcc-4.2.1 seems to miscompile it. #if defined(__llvm__) || !defined(__FreeBSD__) TEST(APIntTest, i33_Count) { APInt i33minus2(33, static_cast<uint64_t>(-2), true); EXPECT_EQ(0u, i33minus2.countLeadingZeros()); EXPECT_EQ(32u, i33minus2.countLeadingOnes()); EXPECT_EQ(33u,

I am working on LLVM backend and was wondering if there is any way by which I can access the value stored SDValue so I can either assign it as a literal or move it to register in an user defined instruction. Something like: SDValue Value = Op->getOperand(2); intValue = Value.get_integer_value //get Value as an int and then if ( intValue > 31) Thanks, Ambuj -------------- next part

Hi, Could you share how you compile IR and which version of JIT you use (Orc, MCJIT)? Could it be that you are using interpreter instead of actual JIT? Cheers, Alex. > On 5. May 2018, at 08:04, edA-qa mort-ora-y via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > I'm having issues of my compiler, and JIT execution, of LLVM IR being > rather slow. It's accounting for

So the problem here was trying to return MIN_VALUE zero extended, if I return sign extended than this issue is resolved; however, I still get an error with getSExtValue when trying to get the value of the const from Instruction: %mask166 = and i128 %lvar_ins176, -18446462598732840961 On Fri, Nov 16, 2012 at 3:17 PM, Ryan Taylor <ryta1203 at gmail.com> wrote: > Eli, > > Thanks

Hi David, In pretty sure that the crash is due to the instruction I have shared in my first email. In order to run pngpixel you just need libpng and zlib.. honest I thought that the .bc had Al the necessary. I'm happy to help you to reproduce it. As a curiosity, why do you think you cannot reproduce it? Unfortunately I won't be able to modify the interpreter soon.. anyway, I'll try to

Hello, I am working on a AVR backend and have a version up and running that will convert LLVM IR code to assembly code for my target. I have written a bunch of instructions from the AVR Instruction Set in AVRInstrInfo.td and not much else. In a simple test case I am attempting to compile (if that is the word you are supposed to use for this operation) test.ll: define i8 @foo(i8 %a, i8 %b) {

Both Clang/LLVM 3.4 -> Clang/LLVM 3.5 And i will also try using MCJIT. 2014-09-17 18:56 GMT+06:00 Anton Smirnov <dev at antonsmirnov.name>: > Hi, Tim. > > I've used Clang 3.4 final release and now i'm going to test it with 3.5 > release (since i've read about arm64 improvements). > I will report my results. > > BTW, is it possible to get smth like

Hello, I am loop over the arguments of a call instruction : ----> for (Value *arg: c->args()){ errs() << *arg << "\n"; arg->print(llvm::errs(), false); errs()<<"\n"; } -----> How can I convert the arg for binary comparison(== etc.)? If I am correct, it is not a string. If the argument is "i32 1",

I'm having issues of my compiler, and JIT execution, of LLVM IR being rather slow. It's accounting for the vast majority of my full compilation time.  I'm trying to figure out why this is happening, since it's becoming an impediment.  (Note: by slow I mean about 3s of time for only about 2K of my front-end code, 65K lines of LLVM-IR) Using valgrind I see some functions which seem

I've also tried the next combination: true, // ForceInterpreter false, // UseMCJIT and ios app just crashed with no output 2014-09-18 0:47 GMT+06:00 Anton Smirnov <dev at antonsmirnov.name>: > Hey. > > I've checked out LLVM/Clang 3.5 and modified my static libs source code to > use the latest llvm/clang sources. > Also i'm trying triple

Hi, I'm doing a backend port and I'm having trouble with adds that have negative immediates. My architecture only has instructions for subtracting and adding 8bit immediate values (they will be zero-extended, thus unsigned). Bigger immediates have to be moved in a register first. The problem is: Expressions like "b - 1" result in "add nsw i32 %b, -1" in LLVM IR. They

Hi all, I have the following C code: #include<stdio.h> int main(int argc, char *argv[]) { printf("%s\n", argv[0]); return argc; } that generates the following IR for the main function: ; Function Attrs: noinline nounwind optnone uwtable define i32 @main(i32, i8**) #0 { %3 = alloca i32, align 4 %4 = alloca i32, align 4 %5 = alloca i8**, align 8 store i32 0, i32*