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...wing instruction: %a_addr.0 = phi i32 [ 1, %bb ], [ 0, %bb1 ] ; <i32> [#uses=1] This is an SSA phi node which assigns a value of either 1 or 0 to %a_addr.0 depending on whether control reached the PHI node from basic block bb, or bb1. - Lang. On Thu, Sep 23, 2010 at 11:26 PM, maarten faddegon < m.faddegon at student.tudelft.nl> wrote: > Hi, > > I am studying SSA and some time ago I asked on this list how to see the > phi nodes in the llvm ir output. I learned then to use this command: > opt -mem2reg test.ll -S > test_mem2reg.ll > > However, if you look at...

...tion returns the variable %a_addr.0. However, this variable is never defined or set. The variable %a is. Is "_addr.0" a way to get the address of a variable? I could not find anything about this in in LLVM language reference manual. Where does this variable come from? thanks, Maarten Faddegon -------------- next part -------------- ; ModuleID = 'test.ll' target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" target triple = "x86_64-unknown-linux-gnu" d...

...on of the ir. I expected phi nodes all over the place. However, I could not find a single one! Could you tell my why that is so? I compiled with "llvm-gcc -emit-llvm test.c -S -o test.ll". Attached to this message are the source and the resulting ll output. Thanks in advance, Maarten Faddegon -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20100910/e9f65c23/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: test.c Type: text/x-csrc Size: 143 bytes...

...on still applies to ARMv4T or > ARMv5TE when developing portable code Thus, if I want to follow this advice, is there a way to force LLVM to not output instructions such as "mul r0, r0, r2"? As I believe was the effect of the Lauro Ramos Venancio's patch. kind regards, Maarten Faddegon

I try to build a cross powerpc compiler, but llvm-gcc fails. Eric Christopher wrote: > Looks like you don't have an assembler for your target installed that > llvm-gcc can find. I have binutils installed for powerpc and verified they are working with a simple hello world program. $ powerpc-750-linux-gnu-as --version GNU assembler 2.16.1 However, the xgcc build during the seems to

...nstruction mul r0, r0, r2 at line 18. * The patch is discussed at: http://www.mail-archive.com/llvm-commits at cs.uiuc.edu/msg14069.html * llvm-gcc --version llvm-gcc (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build) Copyright (C) 2007 Free Software Foundation, Inc. kind regards, Maarten Faddegon -------------- next part -------------- A non-text attachment was scrubbed... Name: foo.c Type: text/x-csrc Size: 77 bytes Desc: not available URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20101125/e8eef35b/attachment.c> -------------- next part -------------- .syntax unified ....

...6_64-unknown-linux-gnu" CROSS_TARGET="powerpc-linux" CROSS_MARCH="750" LLVM is building ok, but the second step: building llvm-gcc fails with a rather strange error which I appended to the end of this e-mail. Am I doing something wrong or is this a bug? Thanks, Maarten Faddegon --- the error: --- /llvm-gcc-4.2-2.9.source/gcc/../include -I/local/maartenf/opt/src/all_llvm_2_9/buildroot_ppc/src/llvm-gcc-4.2-2.9.source/gcc/../libcpp/include -I/local/maartenf/opt/src/all_llvm_2_9/buildroot_ppc/src/llvm-gcc-4.2-2.9.source/gcc/../libdecnumber -I../libdecnumber -I/local/ma...

...vmdev/attachments/20110520/0b4e1ad2/attachment-0001.html > > ------------------------------ > > Message: 5 > Date: Fri, 20 May 2011 09:39:13 +0800 > From: ??? <chenwj at iis.sinica.edu.tw> > Subject: Re: [LLVMdev] x86 cross compiler for ppc fails to build > To: Maarten Faddegon <m.faddegon at student.tudelft.nl> > Cc: llvmdev at cs.uiuc.edu > Message-ID: <20110520013913.GA62105 at cs.nctu.edu.tw> > Content-Type: text/plain; charset=utf-8 > > Hi, Maarten > > > Can I conclude from this that indeed llvm-gcc for powerpc-linux is > broken...

On May 17, 2011, at 9:47 AM, Maarten Faddegon wrote: > LLVM is building ok, but the second step: building llvm-gcc fails with a > rather strange error which I appended to the end of this e-mail. > Am I doing something wrong or is this a bug? Looks like you don't have an assembler for your target installed that llvm-gcc can find...

...archives I found a thread where more or less the same problem is discussed: http://lists.cs.uiuc.edu/pipermail/llvmdev/2011-January/037327.html Can I conclude from this that indeed llvm-gcc for powerpc-linux is broken? Is anyone maintaining llvm-gcc for powerpc-linux or is it abandoned? Maarten Faddegon

Hi, > I am using a cross compiler to compiler for the arm5 architecture. For this > architecture it is not allowed that a destination register is also used as source > register. > In 2007 a patch was discussed at the mailing list, however my compiler still is > producing this result. Does anyone know if this patch is actually applied? > > * I use the following arguments: