[tree-ssa] PATCH to gimplification of ASM_EXPR

[Jason Merrill]

I'm also applying this subset of the patch to the trunk.  Tested
x86_64-pc-linux-gnu.

2003-06-06  Jason Merrill  <jason@redhat.com>

	* stmt.c (resolve_asm_operand_names): Rename from
	resolve_operand_names.  No longer static.  Avoid needless copying.
	Don't build array of constraints.
	(expand_asm_operands): Build it here.
	* tree.h: Declare resolve_asm_operand_names.

	* stmt.c (expand_decl): Put artificial vars into registers even
	when not optimizing, and don't mark the regs as user vars.

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