[LLVMdev] linux/x86-64 codegen support

[Andrew Lenharth]

See the bug for a reduction and the gimple trees.  validate_arglist
definately is rejecting the arglist in EmitBuiltinAlloca.

(try:
bool TreeToLLVM::EmitBuiltinAlloca(tree exp, Value *&Result) {
  tree arglist = TREE_OPERAND(exp, 1);
  if (!validate_arglist(arglist, INTEGER_TYPE, VOID_TYPE)) {
    debug_tree(arglist);
    return false;
  }
  Value *Amt = Emit(TREE_VALUE(arglist), 0);
  Amt = CastToSIntType(Amt, Type::Int32Ty);
  Result = Builder.CreateAlloca(Type::Int8Ty, Amt, "tmp");
  return true;
}
for a pretty (?) print of the tree at that point)

Andrew

On 2/16/08, Török Edwin <edwintorok at gmail.com> wrote:
> Andrew Lenharth wrote:
> > Interestingly, in the .i file there are 2 __builtin_alloca, and
> > EmitBuiltinAlloca is only being called once.
> >
> >
>
> Hmm, here EmitBuiltinAlloca gets called twice, but it looks like
> validate_arglist is rejecting the args both times.
>
> I have 2 calls to alloca generated:
> $ grep alloca x.bc|grep call
>         %tmp21 = call i8* @alloca( i64 %tmp20 ) nounwind
> ; <i8*> [#uses=1]
>         %tmp3 = call i8* @alloca( i64 %tmp2 ) nounwind          ; <i8*>
> [#uses=1]
>
> I added some printfs around that code, running cc1 shows it never
> reaches the 2nd printf:
> 4762│   printf("HERE!!\n");
> 4763│   tree arglist = TREE_OPERAND(exp, 1);
> 4764├>  if (!validate_arglist(arglist, INTEGER_TYPE, VOID_TYPE))
> 4765│     return false;
> 4766│   printf("THERE!!\n")
>
> Is there a way to nicely dump arglist?
> gdb's print *arglist shows too much information....
>
> $ /home/edwin/llvm-svn/obj42/./prev-gcc/cc1 charset.i
>  vprintf getchar fgetc_unlocked getc_unlocked getchar_unlocked putchar
> fputc_unlocked putc_unlocked putchar_unlocked feof_unlocked
> ferror_unlocked gnu_dev_major gnu_dev_minor gnu_dev_makedev atof atoi
> atol atoll stat lstat fstat mknod cpp_in_system_header ustrcmp ustrncmp
> ustrcspn ustrlen uxstrdup ustrchr ufputs one_utf8_to_cppchar
> one_cppchar_to_utf8 one_utf8_to_utf32 one_utf32_to_utf8
> one_utf8_to_utf16 one_utf16_to_utf8 conversion_loop convert_utf8_utf16
> convert_utf8_utf32 convert_utf16_utf8 convert_utf32_utf8
> convert_no_conversion convert_using_iconv init_iconv_descHERE!!
>  cpp_init_iconv _cpp_destroy_iconv cpp_host_to_exec_charset
> width_to_mask ucn_valid_in_identifier _cpp_valid_ucn convert_ucn
> emit_numeric_escape convert_hex convert_oct convert_escape
> cpp_interpret_string cpp_interpret_string_notranslate
> narrow_str_to_charconst wide_str_to_charconst cpp_interpret_charconst
> _cpp_interpret_identifierHERE!!
>  _cpp_convert_input _cpp_default_encoding cpp_utf8_utf16
> Execution times (seconds)
>  preprocessing         :   0.02 ( 6%) usr   0.01 ( 6%) sys   0.04 ( 8%)
> wall     285 kB ( 6%) ggc
>  lexical analysis      :   0.01 ( 3%) usr   0.10 (59%) sys   0.08 (16%)
> wall       0 kB ( 0%) ggc
>  parser                :   0.06 (19%) usr   0.04 (24%) sys   0.13 (26%)
> wall    2756 kB (56%) ggc
>  tree gimplify         :   0.01 ( 3%) usr   0.00 ( 0%) sys   0.02 ( 4%)
> wall     424 kB ( 9%) ggc
>  llvm backend functions:   0.03 ( 9%) usr   0.00 ( 0%) sys   0.03 ( 6%)
> wall       1 kB ( 0%) ggc
>  llvm backend globals  :   0.01 ( 3%) usr   0.00 ( 0%) sys   0.01 ( 2%)
> wall       0 kB ( 0%) ggc
>  llvm backend per file :   0.17 (53%) usr   0.01 ( 6%) sys   0.18 (36%)
> wall       0 kB ( 0%) ggc
>  TOTAL                 :   0.32             0.17             0.50    4953 kB
>
>
> Best regards,
> --Edwin
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