llvm dev - Sep 2006 - [LLVMdev] X86-64 support checked in

Hi all,

I have checked in the X86-64 backend support. It's functionality  
complete but not tuned for performance. Comments / patches welcome. :-)

However, at this point it is difficult for most of you to make use of  
it. The current llvm-gcc builds do not support the -m64 (or -arch  
x86_64) option so there is no easy way to compile for X86-64. If you  
really want to try it out, you can manually replace the following  
lines in the llvm bytecode files from

target pointersize = 32
target triple = "i686-apple-darwin8"

to

target pointersize = 64
target triple = "x86_64-apple-darwin8"

Substitute appropriate strings for Linux, etc.

Pass the modified the bytecode file to llc and it should generate 64- 
bit assembly. Alternatively, use the -mtriple= option without  
modifying the bytecode file.

Cheers,

Evan

On Fri, 8 Sep 2006, Evan Cheng wrote:
> Substitute appropriate strings for Linux, etc.
One other note... the code generator hasn't been tested on any targets 
other than x86-64 on MacOS.  It's possible that minor porting work will be 
needed to get PIC codegen or some other facet working on x86-64/linux. 
However, it shouldn't be super-involved and we'll help if possible.

I *think* that the existing llvm-gcc4 will work on linux if configured 
with an x86_64 target triple.  We're working on some configury stuff to 
get x86-64-darwin support checked into llvm-gcc4, it might be a couple 
days.

-Chris

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