[LLVMdev] llc with long-longs and hex floating point

[Lew Payne]

In the following sequence:

  $llc -march=c -o diag01_c.c diag01.ll
  $vpolcc.ss -S -k diag01_c.c  <<== **FAILS**
  $vpolcc.ss -o diag01 diag01_c.s

I am using llc (from llvm) to convert an .ll file into a .c file.  I am then
running the .c file through vpolcc.ss (from zephyr) to further process it
for mips architecture.  The vpolcc.ss script fails at lcc (not to be
confused with llc), with the following error:

diag01_c.c:304: `75000ull' is a preprocessing number but an invalid integer
constant
diag01_c.c:305: `0x1.9f4bc6p' is a preprocessing number but an invalid
integer constant
diag01_c.c:306: `0x1.85d54c985f06fp' is a preprocessing number but an
invalid integer constant

Here's a snippet of the relevant section of diag01_c.c:

  *(&llvm_cbe_l) = 75000ull;
  *(&llvm_cbe_f) = 0x1.9f4bc6p+3;
  *(&llvm_cbe_d) = -0x1.85d54c985f06fp+6;

Here's how vpolcc.ss is calling lcc:

  ($CFE is : ~/mips/lcc-run/lcc )
  ($cfeflag: I~/sim/sslittle-na-sstrix-include )
  execute "$CFE $cfeflag -g -Wf-target=$TARGET -S -o $base.lef $base.i"

My questions are (the second one is relevant to llvm):

Can anyone tell me what I can do to get lcc to accept long-long values, as
well as C9X hex floating point constants and such?

If necessary, I'm willing to modify llc (CBackend.cpp) to generate values
that lcc can digest.  However, I'm not sure how else I can represent the
values shown above.

Can someone give me an idea of where to start?

Regards,
Lew Payne
Boise State University
Compiler Research Team
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