[LLVMdev] Duplicate assignment in LLVM?

[Reid Spencer]

Okay, I've replicated your results, but I don't think there's an error here, 
its just not nice output from the disassembler. The first %tmp.ll is of type 
long. The second one is of type short. I think that's valid for LLVM. That 
is, the SSA form depends on both the type and name of the virtual register. 
In any event, llvm-as seems to compile the llvm-dis output just fine.

Make sense?

Reid.

On Wed, 07 Jul 2004 12:01:15 -0400
  "Reid Spencer" <reid at x10sys.com> wrote:
> Okay, let me test with exactly your options and I'll let you know what I 
>get.
> 
> Reid.
> 
> On Wed, 7 Jul 2004 19:53:15 +0400
>  Vladimir Prus <ghost at cs.msu.su> wrote:
>> Reid Spencer wrote:
>>> Volodya,
>>>
>>> I think you may need to update your CFE and rebuild. I compiled the test
>>> using my local build and I didn't get the results you see below. I'm
>>> also very surprised to see this output. The first %tmp.11 should have
>>> been %tmp.1 .. not sure how it got corrupted. In any event, the
>>> attachment is obviously generated by code that runs quite differently
>>> because the virtual register names used are quite different from what
>>> you have below. If you updated last week sometime, is it possible you
>>> got caught between some of Chris' "determinism" changes?
>>>
>>> Anyway, try an update and let us know how it goes.
>> 
>> This still happens after update and rebuild:
>> 
>> $ /home/ghost/build/llvm-gcc/install/bin/gcc -g -S -fno-inline -o 
>>test.llvm 
>> tests/2003-05-26-Shorts.c
>> $ gccas -disable-inlining test.llvm -o test.bc
>> $ llvm-dis -f test.bc
>> $ less test.ll
>> ........
>> int %main(int %argc, sbyte** %argv) {
>> entry:
>>        call void %__main( )
>>        %tmp.11 = call ulong %getL( )           ; <ulong> [#uses=16]
>>        %tmp.3 = cast ulong %tmp.11 to long             ; <long> [#uses=
>> 6]
>>        %tmp.5 = cast ulong %tmp.11 to uint             ; <uint> [#uses=
>> 6]
>>        %tmp.7 = cast ulong %tmp.11 to int              ; <int> [#uses=7
>> ]
>>        %tmp.9 = cast ulong %tmp.11 to ushort           ; <ushort> [#use
>> s=3]
>>        %tmp.11 = cast ulong %tmp.11 to short
>> 
>> 
>> - Volodya
>> 
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