* i386.c: Revert 07-30 ix86_output_main_function_alignment_hack.
From-SVN: r44638
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@ -1,3 +1,7 @@
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2001-08-04 Richard Henderson <rth@redhat.com>
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* i386.c: Revert 07-30 ix86_output_main_function_alignment_hack.
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2001-08-04 Neil Booth <neil@daikokuya.demon.co.uk>
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2001-08-04 Neil Booth <neil@daikokuya.demon.co.uk>
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* cpphash.h (struct cpp_reader): New member directive_line.
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* cpphash.h (struct cpp_reader): New member directive_line.
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@ -574,7 +574,6 @@ static HOST_WIDE_INT ix86_GOT_alias_set PARAMS ((void));
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static void ix86_adjust_counter PARAMS ((rtx, HOST_WIDE_INT));
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static void ix86_adjust_counter PARAMS ((rtx, HOST_WIDE_INT));
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static rtx ix86_expand_aligntest PARAMS ((rtx, int));
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static rtx ix86_expand_aligntest PARAMS ((rtx, int));
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static void ix86_expand_strlensi_unroll_1 PARAMS ((rtx, rtx));
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static void ix86_expand_strlensi_unroll_1 PARAMS ((rtx, rtx));
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static void ix86_output_main_function_alignment_hack PARAMS ((FILE *f, int));
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struct ix86_address
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struct ix86_address
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{
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{
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@ -640,10 +639,6 @@ static void sco_asm_named_section PARAMS ((const char *, unsigned int,
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HOST_WIDE_INT));
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HOST_WIDE_INT));
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# undef TARGET_ASM_FUNCTION_PROLOGUE
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# undef TARGET_ASM_FUNCTION_PROLOGUE
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# define TARGET_ASM_FUNCTION_PROLOGUE ix86_osf_output_function_prologue
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# define TARGET_ASM_FUNCTION_PROLOGUE ix86_osf_output_function_prologue
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#else
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# undef TARGET_ASM_FUNCTION_PROLOGUE
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# define TARGET_ASM_FUNCTION_PROLOGUE \
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ix86_output_main_function_alignment_hack
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#endif
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#endif
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#undef TARGET_ASM_OPEN_PAREN
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#undef TARGET_ASM_OPEN_PAREN
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@ -10788,48 +10783,6 @@ ix86_memory_move_cost (mode, class, in)
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}
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}
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}
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}
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/* Most of current runtimes (Jul 2001) do not align stack properly when
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entering main, so emit an wrapper to align stack before the real main
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code is called.
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This can eventually go if we manage to fix the runtimes or teach gcc
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to dynamically align stack in main automatically.
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Adding check to configure is probably not good idea, as binarry can move
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from one shared library to older. */
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static void
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ix86_output_main_function_alignment_hack (file, size)
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FILE *file;
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int size ATTRIBUTE_UNUSED;
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{
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rtx label;
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char buf[256];
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/* Check that we see main function with maximally 8 bytes of arguments.
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if so, emit the hack to align stack for runtimes, where this constraint
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is broken. */
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if (strcmp (cfun->name, "main"))
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return;
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if (cfun->pops_args || cfun->args_size > 12)
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return;
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if (PREFERRED_STACK_BOUNDARY <= 2)
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return;
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label = gen_label_rtx ();
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fprintf (file, "\tpushl\t%%ebp\n");
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fprintf (file, "\tmovl\t%%esp, %%ebp\n");
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fprintf (file, "\tandl\t$0xfffffff0, %%esp\n");
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fprintf (file, "\tpushl\t%%ebp\n");
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fprintf (file, "\tpushl\t16(%%ebp)\n");
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fprintf (file, "\tpushl\t12(%%ebp)\n");
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fprintf (file, "\tpushl\t8(%%ebp)\n");
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fprintf (file, "\tcall\t");
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ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (label));
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assemble_name (file, buf);
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fprintf (file, "\n\tleave\n");
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fprintf (file, "\tret\n");
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ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (label));
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}
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#if defined(TARGET_ELF) && defined(TARGET_COFF)
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#if defined(TARGET_ELF) && defined(TARGET_COFF)
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static void
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static void
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sco_asm_named_section (name, flags, align)
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sco_asm_named_section (name, flags, align)
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