similar to: Figuring out return address of a call

Sorry for emailing both group. As I will have a constant array of BlockAddress, what type I should use in Constant Array for its ArrayType declaration? I am creating the list in following way: unsigned int nBr = fit->second.size(); llvm::Constant *listBA[nBr]; unsigned int Idx = 0; for (std::set<llvm::BasicBlock *>::iterator it = fit->second.begin(); it != fit->second.end(); ++it)

Hi Good day. For the following function local static constant array: static const __attribute__((used)) __attribute__((section("data"))) void *codetable[] = { &&RETURN, &&INCREMENT, &&DECREMENT, &&DOUBLE, &&SWAPWORD}; I have the following in the LLVM IR. @sampleCode.codetable = internal global [5 x i8*] [i8* blockaddress(@sampleCode, %19), i8*

Hi all, I have a question concerning block address class in LLVM. I am currently working on a project where I need to obtain and manipulate basic block virtual addresses. I was searching the web and found the llvm::BlockAddress class (http://llvm.org/doxygen/classllvm_1_1BlockAddress.html). With this class I was able to obtain a printout like this: i8* blockaddress(@func_name, %bb_label) How do

On Mon, Apr 16, 2018 at 04:14:03PM -0400, Brenda So via llvm-dev wrote: > Hi all, > > I have a question concerning block address class in LLVM. I am currently > working on a project where I need to obtain and manipulate basic block virtual > addresses. I was searching the web and found the llvm::BlockAddress class ( > http://llvm.org/doxygen/classllvm_1_1BlockAddress.html). With

On Mar 15, 2010, at 9:41 AM, Chris Lattner wrote: > > On Mar 15, 2010, at 7:11 AM, Sebastian Schlunke wrote: > >> Hi, >> >> i ran into a problem when using blockaddress() with a label in another function. It seems to me that LLVM tries to remove the label used in blockaddress because it seems like it is not used, but in fact it may be used somewhere with a

On Sun, Jul 31, 2011 at 7:36 AM, Carlo Alberto Ferraris <cafxx at strayorange.com> wrote: > 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 =

On Fri, Jun 28, 2019 at 3:35 PM James Y Knight <jyknight at google.com> wrote: > On Fri, Jun 28, 2019 at 5:53 PM Bill Wendling <isanbard at gmail.com> wrote: > >> On Fri, Jun 28, 2019 at 1:48 PM James Y Knight <jyknight at google.com> >> wrote: >> >>> On Fri, Jun 28, 2019 at 3:00 PM Bill Wendling <isanbard at gmail.com> >>> wrote:

On Mar 15, 2010, at 7:11 AM, Sebastian Schlunke wrote: > Hi, > > i ran into a problem when using blockaddress() with a label in another function. It seems to me that LLVM tries to remove the label used in blockaddress because it seems like it is not used, but in fact it may be used somewhere with a indirectbr. > > I attached a small test-case that produces this error. (The

Hi I use BlockAddress to get the address of BasicBlock , and I use GlobalVariable 's getInitializer() to pass the address of BasicBlock to the global variable of my own program and then I print it out. But , I found that BlockAddress is not always correct. For example, some function's rsp (stack pointer) or other register is maintained by caller, so it would be like:

I see. But the block does not necessarily contain dead code. My original problem is more like this: define i32 @main() { entry: %target = bitcast i8* blockaddress(@test_fun, %test_label) to i8* call i32 @test_fun(i8* %target) ret i32 0 } define i32 @test_fun(i8* %target) { entry: indirectbr i8* %target, [label %test_label] test_label: ; assume some code here... br label %ret ret: ret

On Mon, Jul 1, 2019 at 6:25 PM Finkel, Hal J. <hfinkel at anl.gov> wrote: > On 7/1/19 1:38 PM, Bill Wendling via llvm-dev wrote: > > On Fri, Jun 28, 2019 at 3:35 PM James Y Knight <jyknight at google.com> > wrote: > >> On Fri, Jun 28, 2019 at 5:53 PM Bill Wendling <isanbard at gmail.com> wrote: >> >>> On Fri, Jun 28, 2019 at 1:48 PM James Y

Hi, The LangRef warns that "blockaddress(@function, %block)" has a limited and target-dependent applicability: https://llvm.org/docs/LangRef.html#addresses-of-basic-blocks But I wanted very much to save addresses of blocks in a global variable and so I did: % cat cond.c void foo(long *a) { if (a) *a = 0; } % clang -O1 -c cond.c -fsanitize-coverage=inline-8bit-counters,pc-table -S

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);

Hi Rasha, > for(rit=Result.begin();rit!=Result.end();++rit) > { > Value* Address= BlockAddress::get (*rit); > > IndirectBrInst *IBI = IndirectBrInst::Create(Address, Result.size(),i->getTerminator() ); > IBI->addDestination((*rit)); > } This would be creating a block looking something like: [ Do stuff ] indirectbr i8*

On Mar 15, 2010, at 10:01 AM, Sebastian Schlunke wrote: > I see. But the block does not necessarily contain dead code. This case is now fixed in r98566, I will fix the 'dead block' case in a bit. -Chris > > My original problem is more like this: > > define i32 @main() { > entry: > %target = bitcast i8* blockaddress(@test_fun, %test_label) to i8* > > call

Works like a charm! Thanks for the fast help. :) - Sebastian On Monday 15 March 2010 20:10:54 you wrote: > > On Mar 15, 2010, at 10:01 AM, Sebastian Schlunke wrote: > > > I see. But the block does not necessarily contain dead code. > > This case is now fixed in r98566, I will fix the 'dead block' case in a bit. > > -Chris > > > > > My

In my llvm jit project I needed to lookup BB addresses at execution time and then jump to the corresponding BB. A C++ routine called at runtime from IR finds the right BB, gets its BlockAddress and returns it as an i8*. The IR does an indirectbr on this value... Well, not really. The routine returns the address of a BlockAddress node. Is there any way to get the real runtime code address for the

> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] > On Behalf Of John Slagel > Subject: [LLVMdev] Saving a reference to a Basic Block? > Is there a way to save a reference to a Basic Block that gets all fixed > up in the linker, so that you can branch to it during execution? We use the blockaddress() constant generator, coupled with the indirectbr

On Mar 15, 2010, at 10:07 AM, Bob Wilson wrote: >>> An earlier revision simply generated asm-code, where the appropriate label was missing, thus causing gcc to fail when i wanted to compile the asm-file. >> >> Here is a slightly reduced testcase: >> >> define i8* @test1() nounwind { >> entry: >> ret i8* blockaddress(@test_fun, %test_label) >> }

Hi Rasha, > I need to addDestination to some basic blocks Just to make sure there's no confusion here: you really are trying to create code like: define i32 @foo(i1 %tst) { %Address = select i1 %tst, i8* blockaddress(@foo, %true), i8* blockaddress(@foo, %false) indirectbr i8* %Address, [label %true, label %false] ; This is what you're creating true: ret i32 42 false: ret i32