[PATCH] Fastcall support on cygwin and mingw targets

["Casper Hornstrup" <chorns@users.sourceforge.net>]

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This is a refresh of the patch that implements support
in gcc for the fastcall calling convention on cygwin and
mingw targets (found here:
http://gcc.gnu.org/ml/gcc-patches/2002-11/msg00638.html).
This version of the patch includes changes as suggested
by people on this list.


gcc/testsuite/ChangeLog

2002-11-13  Casper S. Hornstrup  <chorns@users.sourceforge.net>

	* gcc.c-torture/compile/20021110-1.c: New test.
	* gcc.c-torture/compile/20021110-1.x: Likewise.
	* gcc.c-torture/compile/20021110-2.c: Likewise.
	* gcc.c-torture/compile/20021110-2.x: Likewise.
	* gcc.c-torture/compile/20021110-3.c: Likewise.
	* gcc.c-torture/compile/20021110-3.x: Likewise.
	* gcc.c-torture/compile/20021110-4.c: Likewise.
	* gcc.c-torture/compile/20021110-4.x: Likewise.


gcc/ChangeLog

2002-11-13  Casper S. Hornstrup  <chorns@users.sourceforge.net>

	* config/i386/i386.c (ix86_handle_cdecl_attribute): Check for
	attributes incompatible with fastcall attribute.
	(ix86_handle_regparm_attribute): Likewise.

2002-11-13  Danny Smith  <dannysmith@users.sourceforge.net>

	* config/i386/i386.c (ix86_comp_type_attributes): Check for
mismatched
	fastcall types.

2002-11-13  Eric Kohl  <ekohl@rz-online.de>

	* config/i386/cygwin.h (TARGET_OS_CPP_BUILTINS): Add fastcall
	attributes.
	(ASM_OUTPUT_LABELREF): Add __imp_ prefix now rather than in
winnt.c.
	* config/i386/winnt.c (i386_pe_mark_dllimport). Convert internal
	fastcall decoration to MS-compatible decoration. Add __imp_
prefix in
	ASM_OUTPUT_LABELREF rather than here.
	* config/i386/i386.c (ix86_attribute_table): Accept 'fastcall'
as a
	valid attribute.
	(ix86_return_pops_args): Fastcall functions pop the stack.
	(init_cumulative_args): Reserve registers ECX and EDX if
function has
	fastcall attribute.
	(function_arg): Use registers ECX and EDX if function has
fastcall
	attribute.
	* config/i386/i386.h (CUMULATIVE_ARGS): Add fastcall attribute
flag.
	* config/i386/mingw32.h (TARGET_OS_CPP_BUILTINS): Add fastcall
	attributes.
	* config/i386/winnt.c (gen_fastcall_suffix): New function.
Decorates a
	label name with a preliminary fastcall prefix (+) and the
stdcall
	suffix.
	(i386_pe_encode_section_info): Call gen_fastcall_suffix() if a
symbol
	has a fastcall attribute.
	(i386_pe_strip_name_encoding): Return length of internal
fastcall
	prefix (+).
	(i386_pe_fastcall_name_p): New function. Checks a symbol for
presence
	of internal fastcall prefix ('+' prefix).
	(i386_pe_asm_file_end): Converts internal fastcall prefix ('+'
prefix)
	into the Microsoft compatible '@' prefix.
	* doc/extend.texi: Add documentation of fastcall attribute.

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