[PATCH] Fix bootstrap failure on i686-pc-linux-gnu

[Caroline Tice]

The following patch fixes a bootstrap problem caused by the most
recent hot/cold patch that was committed.  The problem was a faulty
assumption that if current_function_decl was defined, it had a valid
function struct attached to it.

This patch fixes the problem (reported in PR 20934, 20940 and 20942).

I have tested this patch on an Apple G5 running powerpc darwin and an
x86 running Linux.  It has passed a profiledbootstrap with
partitioning, a profiledbootstrap with reordering but no partitioning,
and a regular bootstrap.  I'm in the process of running DejaGnu tests.
Assuming it passes these tests, is it okay to commit to FSF mainline?

-- Caroline Tice
ctice@apple.com

2005-04-11  Caroline Tice  <ctice@apple.com>

         * dwarf2out.c (dwarf2out_switch_text_section): Check 
current_function_decl
         and DECL_STRUCT_FUNCTION (current_function_decl) to make sure 
they
         exist before trying to use them to access cold text section 
name.
         (output_line_info): Likewise.
         (add_location_or_const_value_attribute): Likewise.
         (dwarf2out_var_location): Likewise.
         * varasm.c (initialize_cold_section_name): Likewise.
         (unlikely_text_section): Likewise.
         (in_unlikely_text_section): Likewise.
         (named_section): Test for cfun before trying to dereference it.
         (default_section_type_flags_1): Likewise.



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