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patches/gcc/3.4.6/190-all_sh-pr16665-fix.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Jul 17 22:43:07 2011 +0200 (2011-07-17)
changeset 2893 a8a65758664f
parent 402 197e1b49586e
permissions -rw-r--r--
cc/gcc: do not use the core pass-2 to build the baremetal compiler

In case we build a baremetal compiler, use the standard passes:
- core_cc is used to build the C library;
- as such, it is meant to run on build, not host;
- the final compiler is meant to run on host;

As the current final compiler step can not build a baremetal compiler,
call the core backend from the final step.

NB: Currently, newlib is built during the start_files pass, so we have
to have a core compiler by then... Once we can build the baremetal
compiler from the final cc step, then we can move the newlib build to
the proper step, and then get rid of the core pass-1 static compiler...

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 diff -durN gcc-3.4.6.orig/gcc/config/sh/sh.c gcc-3.4.6/gcc/config/sh/sh.c

     2 --- gcc-3.4.6.orig/gcc/config/sh/sh.c	2004-09-03 08:51:30.000000000 +0200

     3 +++ gcc-3.4.6/gcc/config/sh/sh.c	2007-08-15 23:01:48.000000000 +0200

     4 @@ -9107,6 +9107,15 @@

     5      }

     6    this = FUNCTION_ARG (cum, Pmode, ptr_type_node, 1);

     7  

     8 +  /* In PIC case, we set PIC register to compute the target address.  We

     9 +     can use a scratch register to save and restore the original value  

    10 +     except for SHcompact.  For SHcompact, use stack.  */

    11 +  if (flag_pic && TARGET_SHCOMPACT)

    12 +    {

    13 +      push (PIC_OFFSET_TABLE_REGNUM);

    14 +      emit_insn (gen_GOTaddr2picreg ());

    15 +    }

    16 +

    17    /* For SHcompact, we only have r0 for a scratch register: r1 is the

    18       static chain pointer (even if you can't have nested virtual functions

    19       right now, someone might implement them sometime), and the rest of the

    20 @@ -9189,8 +9198,24 @@

    21        assemble_external (function);

    22        TREE_USED (function) = 1;

    23      }

    24 +  /* We can use scratch1 to save and restore the original value of

    25 +     PIC register except for SHcompact.  */

    26 +  if (flag_pic && ! TARGET_SHCOMPACT)

    27 +    {

    28 +      emit_move_insn (scratch1,

    29 +		      gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM));

    30 +      emit_insn (gen_GOTaddr2picreg ());

    31 +    }

    32    funexp = XEXP (DECL_RTL (function), 0);

    33    emit_move_insn (scratch2, funexp);

    34 +  if (flag_pic)

    35 +    {

    36 +      if (! TARGET_SHCOMPACT)

    37 +	emit_move_insn (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM),

    38 +			scratch1);

    39 +      else

    40 +	pop (PIC_OFFSET_TABLE_REGNUM);

    41 +    }

    42    funexp = gen_rtx_MEM (FUNCTION_MODE, scratch2);

    43    sibcall = emit_call_insn (gen_sibcall (funexp, const0_rtx, NULL_RTX));

    44    SIBLING_CALL_P (sibcall) = 1;
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