Carl
2014-Jan-26 14:27 UTC
[LLVMdev] [llmdev] fail to process llvm generated assembly on windows/mingw32
Hello guys, I'm using llvm 3.3 on windows with mingw (triple: "i386-unknown-mingw32") to compile IR code that my program generates. I do it in two phases: first I emit assembly code and then assemble it. TargetMachine targetMachine target.createTargetMachine(triple); targetMachine.setAsmVerbosityDefault(true); targetMachine.setFunctionSections(true); targetMachine.setDataSections(true); targetMachine.getOptions().setNoFramePointerElim(true); output.reset(); targetMachine.emit(module, output, CodeGenFileType.AssemblyFile); module.dispose(); context.dispose(); byte[] asm = output.toByteArray(); output.reset(); asm = output.toByteArray(); BufferedOutputStream oOut = new BufferedOutputStream(new FileOutputStream(oFile)); targetMachine.assemble(asm, clazz.getClassName(), oOut); oOut.close(); (I use a java binding for llvm) Unfortunately, the assemble call fails with the error: org.robovm.llvm.LlvmException: java.io.PrintWriter:478:2: error: unknown directive .section .text$java_io_PrintWriter_checkError__Z_lookup,"xr" ^ java.io.PrintWriter:479:2: error: unknown directive .linkonce discard ^ java.io.PrintWriter:629:2: error: unknown directive .section .text$java_io_PrintWriter_clearError__V_lookup,"xr" ^ java.io.PrintWriter:630:2: error: unknown directive .linkonce discard ^ java.io.PrintWriter:818:2: error: unknown directive .section .text$java_io_PrintWriter_close__V_lookup,"xr" ^ java.io.PrintWriter:819:2: error: unknown directive .linkonce discard ^ java.io.PrintWriter:1008:2: error: unknown directive .section .text$java_io_PrintWriter_flush__V_lookup,"xr" ^ java.io.PrintWriter:1009:2: error: unknown directive .linkonce discard ^ java.io.PrintWriter:1062:2: error: unknown directive .section .text$java_io_PrintWriter_format__Ljava_lang_String$3B$5BLjava_lang_Object$3B__Ljava_io_PrintWriter$3B_lookup,"xr" ^ java.io.PrintWriter:1063:2: error: unknown directive .linkonce discard Did you ever get that error? The fact is I need to generate my code in two steps (emit assembly and then assemble) because of some ASM processing that my program later does (and that I commented out). It is interesting to notice that if I generate the obj directly with targetMachine.emit(module, output, CodeGenFileType.ObjectFile); the generation is OK. (but then my program is unable to process the ASM, so that's not good). More info about my llvm configuration: LLVM (llvm.org): LLVM version 3.3 Optimized build with assertions. Built Aug 4 2013 (14:50:50). Default target: i686-w64-mingw32 Host CPU: corei7-avx Registered Targets: aarch64 - AArch64 arm - ARM cpp - C++ backend hexagon - Hexagon mblaze - MBlaze mips - Mips mips64 - Mips64 [experimental] mips64el - Mips64el [experimental] mipsel - Mipsel msp430 - MSP430 [experimental] nvptx - NVIDIA PTX 32-bit nvptx64 - NVIDIA PTX 64-bit ppc32 - PowerPC 32 ppc64 - PowerPC 64 sparc - Sparc sparcv9 - Sparc V9 systemz - SystemZ thumb - Thumb x86 - 32-bit X86: Pentium-Pro and above x86-64 - 64-bit X86: EM64T and AMD64 xcore - XCore Any idea what may be wrong? Carl. -------------- next part -------------- An HTML attachment was scrubbed... URL: <lists.llvm.org/pipermail/llvm-dev/attachments/20140126/af3d8d88/attachment.html>
Rafael EspĂndola
2014-Jan-27 05:08 UTC
[LLVMdev] [llmdev] fail to process llvm generated assembly on windows/mingw32
On 26 January 2014 09:27, Carl <name.is.carl at gmail.com> wrote:> > > Hello guys, > > I'm using llvm 3.3 on windows with mingw (triple: "i386-unknown-mingw32") to > compile IR code that my > program generates. > > I do it in two phases: first I emit assembly code and then assemble it. > > TargetMachine targetMachine > target.createTargetMachine(triple); > > targetMachine.setAsmVerbosityDefault(true); > targetMachine.setFunctionSections(true); > targetMachine.setDataSections(true); > targetMachine.getOptions().setNoFramePointerElim(true); > output.reset(); > targetMachine.emit(module, output, > CodeGenFileType.AssemblyFile); > module.dispose(); > context.dispose(); > > byte[] asm = output.toByteArray(); > output.reset(); > asm = output.toByteArray(); > > BufferedOutputStream oOut = new BufferedOutputStream(new > FileOutputStream(oFile)); > > targetMachine.assemble(asm, clazz.getClassName(), oOut); > oOut.close(); > > (I use a java binding for llvm) > > Unfortunately, the assemble call fails with the error: > > org.robovm.llvm.LlvmException: java.io.PrintWriter:478:2: error: > unknown directive > .section > .text$java_io_PrintWriter_checkError__Z_lookup,"xr" > ^ > java.io.PrintWriter:479:2: error: unknown directive > .linkonce discard > ^The linkonce directive is coff only. Looks like the wrong asm parser is being used. Cheers, Rafael
Carl
2014-Jan-27 11:06 UTC
[LLVMdev] [llmdev] fail to process llvm generated assembly on windows/mingw32
On Mon, Jan 27, 2014 at 6:08 AM, Rafael EspĂndola < rafael.espindola at gmail.com> wrote:> > The linkonce directive is coff only. Looks like the wrong asm parser > is being used. >That issue is 3.3 and was fixed in 3.4. At least that error disappeared when I moved onto the new version. -------------- next part -------------- An HTML attachment was scrubbed... URL: <lists.llvm.org/pipermail/llvm-dev/attachments/20140127/b6013827/attachment.html>
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