[LLVMdev] alpha assembler with llc

[Ankit Sethia]

Hi,

I configure llvm to generate code for alpha. I use a the following steps to
generate code from the source files:
1) llvm-gcc -c main.c -emit-llvm main.bc
2) opt -load <library fo myPass> -myPass main.bc main.opt.bc
3) llc -march=alpha main.opt.bc -o main.S
4) alphaev67-unknown-linux-gnu-as main.S -o main.o

Most of the files that i compile run just fine. Suddenly, i have hit on a
file where Step 4 generates the  following error:
main.S:1794: Error: unknown pseudo-op: `.bss'

If i just use the alphaev67-unknown-linux-gnu-gcc all the files compile just
fine. Only when i try to use the 4 steps then  i come across this error for
1 file.

Is it a version mismatch between llc assmebly and alpha assembler? How
should i go about debugging this? The errors also persist if i remove step
2.

The difference in error region in  llc generated alpha assembly and the
corresponding alpha cross compiler gcc genertated assembly is as follow:
llc generates:
   .type fetch_ext_rgba_dxt1, at object # @fetch_ext_rgba_dxt1
   .bss
   .globl  fetch_ext_rgba_dxt1
   .align  3
 fetch_ext_rgba_dxt1:
   .quad 0
   .size fetch_ext_rgba_dxt1, 8

alpha-gcc generates:
   .zero 8
   .globl fetch_ext_rgba_dxt1

   .type fetch_ext_rgba_dxt1, @object

   .size fetch_ext_rgba_dxt1, 8

   .align 3
 fetch_ext_rgba_dxt1:

Let me know if any other information is required.


-- 
Ankit
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