search for: globalvar

...cking this in test/Transforms/LICM/scalar-promote-memmodel.ll However, I have a sample code where GCC is able to promote the memory to scalar and hoist/sink load/store out of loop but LLVM cannot. Is GCC being aggressive here or LLVM missing out an opportunity? Here is my sample code: extern int globalvar; void foo(int n , int incr) { unsigned int i; for (i = 0 ; i < n; i += incr ) { if (i < n/2) globalvar += incr; } return; } GCC output: $ aarch64-linux-gnu-g++ -S -o - -O3 -ffast-math -march=armv8-a+simd test.cpp .arch armv8-a+fp+simd .file "test.cpp...

...<morisset at google.com> wrote: > > The problem here is that doing this can introduce a race which is undefined at the IR level. > In the example you gave above I suspect that this is a bug in GCC. I may have missed something in the assembly, but it appears that gcc loads a copy of globalvar in w3, does stuff with w3 and then stores w3 in globalvar. This is unsound in the case where the loop is run with n = 0. > For an example, if you have a thread run foo(0,0) in a loop (so not doing anything) and another thread doing: > for (int i = 0 ; i <1000000 ; ++i) { > globalvar...

..., Robin Morisset <morisset at google.com> wrote: The problem here is that doing this can introduce a race which is undefined at the IR level. In the example you gave above I suspect that this is a bug in GCC. I may have missed something in the assembly, but it appears that gcc loads a copy of globalvar in w3, does stuff with w3 and then stores w3 in globalvar. This is unsound in the case where the loop is run with n = 0. For an example, if you have a thread run foo(0,0) in a loop (so not doing anything) and another thread doing: for (int i = 0 ; i <1000000 ; ++i) {     globalvar = i;     asser...

Hi, Is it possible to make up a ConstantArray containing a "const char*" string and pass it directly to the function "char*" argument *without* creating a GlobalVaribable? I looked around and found the usual implementation is array->globalVar->gep. If we omit globalVar & gep, then the argument type would be [ i8 x N ], where N is set to the exact string length, and the expected type is i8* => assertion. In other words, in C we can submit constant...

...f this, but note that currently string can be encoded with > less than 8 bits / char in some cases (there might some size increase > because of this). > That said we already paid this with the metadata table in the recent past > for example. > > The format of MODULE_CODE_{FUNCTION,GLOBALVAR,ALIAS,IFUNC,COMDAT} > records would change so that their first operand would specify their names > with a byte offset into the string table. (To allow for backwards > compatibility, I would increment the bitcode version.) > > > I assume you mean the EPOCH? > > Here is what i...

...value names, make bitcode files more compressible and make bitcode easier to parse). The format of the string table would be a top-level block containing a blob containing null-terminated strings [0] similar to the string table format used in most object files. The format of MODULE_CODE_{FUNCTION,GLOBALVAR,ALIAS,IFUNC,COMDAT} records would change so that their first operand would specify their names with a byte offset into the string table. (To allow for backwards compatibility, I would increment the bitcode version.) Here is what it would look like as bcanalyzer output: <MODULE_BLOCK> <V...

...On Nov 20, 2011, at 16:58, "Dmitry N. Mikushin" <maemarcus at gmail.com> wrote: > Hi, > > Is it possible to make up a ConstantArray containing a "const char*" > string and pass it directly to the function "char*" argument *without* > creating a GlobalVaribable? > I looked around and found the usual implementation is > array->globalVar->gep. If we omit globalVar & gep, then the argument > type would be [ i8 x N ], where N is set to the exact string length, > and the expected type is i8* => assertion. > In other words, in...

All, Can you use the global variables set in the [globals] section of the extension.conf file in other configuration files? Here is an example: I have a file called globalvars.conf that I include in the [globals] section in extension.conf. I would like either (a) that the global variables being defined in this section can be used from voicemail.conf or (b) that I can include the globalvars.conf in voicemail.conf and use the variables there also. So: (Bad example bu...

...lass. */ +typedef struct LLVMOpaqueUse *LLVMUseRef; My understanding is that this actually conceptually corresponds to use_iterator, not Use. Please name this something like LLVMUseIterator. Also, please document this, not just referring to llvm::Use. +int LLVMHasInitializer(LLVMValueRef GlobalVar); LLVMValueRef LLVMGetInitializer(LLVMValueRef GlobalVar); Isn't LLVMHasInitializer just LLVMGetInitializer(x) != 0? Otherwise, looks ok to me, -Chris

...ively small part of the data in the bitcode file. The same logic applies to the symbol table (note that we use support::ulittle32_t instead of a bit encoding). That said we already paid this with the metadata table in the recent past > for example. > > The format of MODULE_CODE_{FUNCTION,GLOBALVAR,ALIAS,IFUNC,COMDAT} > records would change so that their first operand would specify their names > with a byte offset into the string table. (To allow for backwards > compatibility, I would increment the bitcode version.) > > > I assume you mean the EPOCH? > No, the MODULE_COD...

...> bitcode file. The same logic applies to the symbol table (note that we use > support::ulittle32_t instead of a bit encoding). > > That said we already paid this with the metadata table in the recent past >> for example. >> > >> The format of MODULE_CODE_{FUNCTION,GLOBALVAR,ALIAS,IFUNC,COMDAT} >> records would change so that their first operand would specify their names >> with a byte offset into the string table. (To allow for backwards >> compatibility, I would increment the bitcode version.) >> >> >> I assume you mean the EPOCH?...

On Tue, Oct 6, 2009 at 2:13 PM, Kenneth Uildriks <kennethuil at gmail.com> wrote: > My front-end is sync'd with the trunk now, and working well, but it > required some additional functions exposed in the C bindings.  I > hereby submit them for review and approval for inclusion in the trunk. > LLVMGetAttribute had a bug in it. Here's the revised version of the patch

My front-end is sync'd with the trunk now, and working well, but it required some additional functions exposed in the C bindings. I hereby submit them for review and approval for inclusion in the trunk. -------------- next part -------------- A non-text attachment was scrubbed... Name: cbindings.patch Type: application/octet-stream Size: 7269 bytes Desc: not available URL:

On Oct 26, 2011, at 12:18 PM, ret val wrote: > I made a GlobalVariable that is of type ConstantArray. For one of it's > elements I assigned it the ConstantExpr::getBitCast of another > GlobalVariable(the "shadow pointer" mentioned). This gives me: > > While deleting: i32 (i32)** %Shadow Variable for ptr1 > Use still stu...

file://docs/LangRef.html#globalvars The section describing the definition of global vars discusses that you can specify an alignment and can also specify a section. Could someone provide an example that works in gccas in release 1.9 for both defining which section the var is assigned to and defining the variables alignment? Also,...

Hi Keno, Could you give a short high-level overview of the way Julia works now with MCJIT instead the JIT: What I gather so far... * Compiled IR functions are emitted to a shadow module. * Any used function is cloned into its own new module and the module is added to MCJIT. * Called functions or globalvars are only declared in that module. * Modules are never removed meaning "old" functions are abandoned rather then replaced. * All function calls go through a trampoline function doing the multiple dispatch, also enabling old function replacement to new version. Thanks, Yaron 2014-07-...

I made a GlobalVariable that is of type ConstantArray. For one of it's elements I assigned it the ConstantExpr::getBitCast of another GlobalVariable(the "shadow pointer" mentioned). This gives me: While deleting: i32 (i32)** %Shadow Variable for ptr1 Use still stuck around after Def is...

...DO gave > anything besides Unknown. I'll be looking more into this tomorrow. > > Here's the current format: > > > ../build/bin/llvm-lto2 dump-summary b.o > --- > NamedGlobalValueMap: > : > - GUID: 3762489268811518743 > Kind: GlobalVar > Linkage: PrivateLinkage > NotEligibleToImport: true > Live: false > cold: > - GUID: 11668175513417606517 > Kind: Function > Linkage: ExternalLinkage > NotEligibleToImport: true >...

...global variables if initialization values are not constants. *Do we really need to create an internal function for complex global variable initializations during variable declaration? Can't we create instructions in global scope?* Example Simple C++ code: int func() { return 5*2; } init globalVar = func(); int main(...) ... Thanks for helping! Aaron -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180506/731b5be2/attachment.html>

On Wed, Jun 7, 2017 at 8:58 AM, Charles Saternos <charles.saternos at gmail.com > wrote: > Alright, now it outputs YAML in the following format: > > --- > NamedGlobalValueMap: > X: > - Kind: GlobalVar > Linkage: ExternalLinkage > NotEligibleToImport: false > Live: false > a: > - Kind: Alias > Linkage: WeakAnyLinkage > NotEligibleToImport: false > Live: false > AliaseeGUID:...