search for: emitlabel

Hi all, I am emitting code for assembler which wants non-standard text for labels (not just "LABEL:"). One way would be to override all methods of AsmPrinter which call MCStreamer::EmitLabel but this is too painful. I can think of two solutions: 1) add AsmPrinter::EmitLabel which calls Streamer by default but may be overriden in target AsmPrinters 2) Register my own instance of MCStreamer which delegates all calls (except EmitLabel) to MCAsmStreamer. For this I will probably need to a...

On Sep 18, 2010, at 8:14 AM, Yuri Gribov wrote: > Hi all, > > I am emitting code for assembler which wants non-standard text for > labels (not just "LABEL:"). One way would be to override all methods > of AsmPrinter which call MCStreamer::EmitLabel but this is too > painful. I can think of two solutions: > > 1) add AsmPrinter::EmitLabel which calls Streamer by default but may > be overriden in target AsmPrinters > 2) Register my own instance of MCStreamer which delegates all calls > (except EmitLabel) to MCAsmStreamer. For...

I have a bit of a riddle: In http://reviews.llvm.org/D19904 I'm trying to spell the following assembly: .palign 2, 0x90 jmp +0x9 nopw 512(%rax,%rax,1) // rest of the code I try the following snippet to accomplish this: OutStreamer->EmitLabel(CurSled); OutStreamer->EmitCodeAlignment(4); auto Target = OutContext.createLinkerPrivateTempSymbol(); // Use a two-byte `jmp`. This version of JMP takes an 8-bit relative offset as // an operand (computed as an offset from the jmp instruction). OutStreamer->EmitInstruction(...

Does anybody know if there is a particular reason why MCAsmStreamer doesn't have its own .h file? https://github.com/llvm-mirror/llvm/blob/0e66a5f53c74056f95d178c86531d7d9cfb23da9/lib/MC/MCAsmStreamer.cpp#L41 It seems like it is a good idea to have this class declared as its own module ( its own .cpp and .h files). That would make it easier to inherit from it if there is a need (like in my

I compile these two lines in llc @tst1 = internal global [4 x i8] zeroinitializer; @tst2 = internal global [4 x i8] [i8 0, i8 1, i8 2, i8 3]; @tst1 is emited via MCStreamer::EmitCommonSymbol while the other is emited via MCStreamer::EmitLabel followed by MCStreamer::EmitBytes from what I can tell, only symbols with common linkage should me emitted by MCStreamer::EmitCommonSymbol, is this the expected behavior or should I fix it? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/p...

...createMCAsmBackend(*MRI, TripleName, MCPU); MCStreamer *Str = TheTarget->createMCObjectStreamer(TheTriple, Ctx, *MAB, *OS, CE, *STI, true, false); So, like, wow, I would think I should be good to go here! I should be able to just use functions like: Str->EmitInstruction(); Str->EmitLabel(); These should then result in everything I've tried to emit coming out in my output object file "tmp.o", you know, as long as I'm careful to be sure to make a call to keep my output file from being deleted. So, when I'm done making "emit" calls like the above, I...

...instruction return result; } --- This corresponds with: BB1 -> MBB10, MBB11, MBB12 where MBB11 and MBB12 have both their address taken, and the reference count for BB1 is increased twice. With this, I am triggering a new assertion failure: In lib/MC/MCAsmStreamer.cpp:328 of MCAsmStreamer::EmitLabel(llvm::MCSymbol*) ---- void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) { assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); MCStreamer::EmitLabel(Symbol); OS << *Symbol << MAI.getLabelSuffix(); EmitEOL(); } --- When I disable the assertion, I...

Hi, What is the best way to debug an llc crash using bugpoint? I am getting the following crash that I would like to reduce llc: /home/vadve/aggarwa4/llvm29/llvm-2.9/lib/MC/MCAsmStreamer.cpp:273: virtual void<unnamed>::MCAsmStreamer::EmitLabel(llvm::MCSymbol*): Assertion `Symbol->isUndefined() && "Cannot define a symbol twice!"' failed. 0 llc 0x00000000013ae046 1 llc 0x00000000013ae5d4 2 libpthread.so.0 0x000000325660eb10 3 libc.so.6 0x0000003255a30265 gsignal + 53 4 libc.so.6...

...jump-table. For instance, given a MachineInstr, I would like to know if it is of the following form. *leaq LJTI0_0(%rip), %rax* Also, say, I want to add custom labels (some string) while generating assembly right before emitting such *lea *instructions, how do I do that given that OutStreamer->EmitLabel() takes MCSymbol as an argument and not a string/StringRef? *My goal: *To find lea instructions corresponding to jump-tables and emit a custom label before such instructions and also maintain a count of how many such lea instructions are there for each jump-table (using a DenseMap). I have a work...

...hey call "xxx=." a debug label. > The other terminology they use is byte pointer vs ISA-encoded address > (ISA-encoded meaning this one bit in the case of mips16 ISA). > > I'm planning to add a virtual method called EmitDebugLabel to MCStreamer > which just calls method EmitLabel. > > Because of some luck, for exception handling at least, I really only > need to EmitDebugLabel for eh_func_beginXX. > > The other entries in the exception table are all a-b, except for > eh_func_beginXX, the 1 bits will cancel each other out. I don't know if > this is s...

Chris, I want to emit code for target which uses non-standard assembler which wants labels to look like LAB nop instead of LAB: I can not do this because labels are emitted by MCAsmStreamer::EmitLabel which can not be overriden. Best regards, Yuri

> Is this just a textual/syntactic thing?  If so, you should add a bit to MCAsmInfo to indicate that this is the behavior, and MCAsmPrinter should be changed to emit labels in this syntax. Thanks! This should be enough. -Yuri

...you should add a bit to MCAsmInfo to indicate that this is the behavior, and MCAsmPrinter should be changed to emit labels in this syntax. > > Thanks! This should be enough. > > -Yuri > /Yuri Gribov -------------- next part -------------- A non-text attachment was scrubbed... Name: EmitLabel.diff Type: application/octet-stream Size: 1741 bytes Desc: not available URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20100921/903861fa/attachment.obj>

Compiling the IR code at http://pastebin.com/hSwdLdD0 for target triple x86_64-apple-macosx fails with : assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); `anon'::MCMachOStreamer::EmitLabel(llvm::MCSymbol * Symbol) llvm::DwarfDebug::emitDebugInfo() Line 1752 + 0x3c bytes C++ llvm::DwarfDebug::endModule() Line 865 C++ llvm::AsmPrinter::doFinalization(llvm::Module & M) Line 878 C++ llvm::FPPassManager::doFinalization(llvm::Module & M) Line 1536 llvm::FPPassManager::runOnModu...

...> // If there are no lines to emit (such as when we're using .loc > directives > // to emit .debug_line information) don't emit a .debug_line > header. > if (SectionSourceLines.empty()) > return; The fix is to move the early exist to just below this line: EmitLabel("line_prolog_end", 0), right? > > > Basically, if there's a file with only data in it, we still need the > debug_line prologue generated. Right. > > By removing the "early exit" from EmitDebugLine, I got LLVM to > generate this data. However, Dan poi...

mips16 has some unusual requirements for label symbols in .s. I think that arm thumb has the same issue but have not located yet how this is handled. When you have a label of an instruction in mips16, when you reference the label, the linker adds a 1 to the address. When you call an odd numbered address, the procesor switches to mips16 mode and when you call an even numbered address it

...the tail of the debug info section: emitDIE(Die); // FIXME - extra padding for gdb bug. Asm->OutStreamer.AddComment("4 extra padding bytes for GDB"); Asm->EmitInt8(0); Asm->EmitInt8(0); Asm->EmitInt8(0); Asm->EmitInt8(0); Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("info_end", TheCU->getID())); Does anybody know what the bug is in GDB that this works around? The workaround was added as part of r103439[1], which added support for multiple compilation units in one module. Does the bug ever affect modules with only a single co...

...char *CurBufferPtr; > + > public: > virtual ~MachineCodeEmitter() {} > > @@ -158,6 +161,9 @@ > /// start of the block is, and can implement > getMachineBasicBlockAddress. > virtual void StartMachineBasicBlock(MachineBasicBlock *MBB) = 0; > > + virtual void EmitLabel(uint64_t LabelID) = 0; > + > + > /// getCurrentPCValue - This returns the address that the next > emitted byte > /// will be output to. > /// > @@ -193,6 +199,10 @@ > /// emitted. > /// > virtual intptr_t getMachineBasicBlockAddress(MachineBasicBloc...

On Fri, Jul 16, 2010 at 11:25 AM, Daniel Dunbar <daniel at zuster.org> wrote: > Hi Michael, > > Overall patch looks good. I do have a few comments below. My main > comment is please try to make the style match that used in the > MCMachOStreamer more closely. I intend to refactor more functionality > into the base MCObjectStreamer class, and having them use consistent >

Hi, I'm embarrassed that I can't figure this out... I have a compiler that outputs my module in either .s assembly format or .obj binary format, either one works just fine. But if I try to output both of them by adding passes, LLVM throws an Assert: void WinCOFFStreamer::EmitLabel(MCSymbol *Symbol) { assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); MCObjectStreamer::EmitLabel(Symbol); } I attached my code which attempts to make it output both... if I comment out the lines for one or the other it works just fine. That code is just a...