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function.c (PREFERRED_STACK_BOUDNARY): Provide default value.
* function.c (PREFERRED_STACK_BOUDNARY): Provide default value. (assign_stack_local_1): Limit alignment to PREFERRED_STACK_BOUNDARY, update stack_alignment_needed. (prepare_function_start): Initialize stack_alignment_needed * function.h (struct function): Add field stack_alignment_needed. From-SVN: r30958
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@ -1,3 +1,11 @@
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Wed Dec 15 16:11:55 MET 1999 Jan Hubicka <hubicka@freesoft.cz>
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* function.c (PREFERRED_STACK_BOUDNARY): Provide default value.
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(assign_stack_local_1): Limit alignment to PREFERRED_STACK_BOUNDARY,
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update stack_alignment_needed.
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(prepare_function_start): Initialize stack_alignment_needed
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* function.h (struct function): Add field stack_alignment_needed.
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Wed Dec 15 14:55:24 1999 J"orn Rennecke <amylaar@cygnus.co.uk>
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* caller-save.c (insert_one_insn): Returns struct insn_chain *.
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@ -68,6 +68,10 @@ Boston, MA 02111-1307, USA. */
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#define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
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#endif
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#if !defined (PREFERRED_STACK_BOUNDARY) && defined (STACK_BOUNDARY)
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#define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
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#endif
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/* Some systems use __main in a way incompatible with its use in gcc, in these
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cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
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give the same symbol without quotes for an alternative entry point. You
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@ -543,6 +547,13 @@ assign_stack_local_1 (mode, size, align, function)
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function->x_frame_offset -= size;
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#endif
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/* Ignore alignment we can't do with expected alignment of the boundary. */
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if (alignment * BITS_PER_UNIT > PREFERRED_STACK_BOUNDARY)
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alignment = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT;
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if (function->stack_alignment_needed < alignment * BITS_PER_UNIT)
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function->stack_alignment_needed = alignment * BITS_PER_UNIT;
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/* Round frame offset to that alignment.
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We must be careful here, since FRAME_OFFSET might be negative and
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division with a negative dividend isn't as well defined as we might
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@ -5764,6 +5775,8 @@ prepare_function_start ()
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current_function->original_decl_initial = 0;
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current_function->original_arg_vector = 0;
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current_function->stack_alignment_needed = 0;
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/* Set if a call to setjmp is seen. */
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current_function_calls_setjmp = 0;
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@ -456,6 +456,8 @@ struct function
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int uses_pic_offset_table;
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/* tm.h can use this to store whatever it likes. */
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struct machine_function *machine;
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/* The largest alignment of slot allocated on the stack. */
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int stack_alignment_needed;
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/* Language-specific code can use this to store whatever it likes. */
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struct language_function *language;
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