re PR c/21419 (Accepts writting to const via asm)

re PR c/21419 (Accepts writting to const via asm)

2005-10-05  Paolo Bonzini  <bonzini@gnu.org>

	PR tree-optimization/21419
	PR tree-optimization/24146
	PR tree-optimization/24151

	* c-typeck.c (readonly_error): Handle USE being lv_asm.
	(build_asm_expr): Call it if outputs are read-only.
	* gimplify.c (gimplify_asm_expr): Remove former fix to PR 21419.

cp:
2005-10-05  Paolo Bonzini  <bonzini@gnu.org>

	PR tree-optimization/21419
	PR tree-optimization/24146
	PR tree-optimization/24151

	* semantics.c (finish_asm_stmt): Call readonly_error if outputs are
	read-only.  Set ASM_VOLATILE_P for asms without outputs.

testsuite:
2005-10-05  Paolo Bonzini  <bonzini@gnu.org>

	PR tree-optimization/21419
	PR tree-optimization/24146
	PR tree-optimization/24151

	* g++.dg/ext/asm7.C: New.
	* g++.dg/ext/asm8.C: New.
	* gcc.dg/asm-1.c: Compile on all targets.
	* gcc.dg/asm-pr24146.c: New.
	* gcc.dg/pr21419.c: Adjust error messages.

From-SVN: r104988