[PATCH] Implementation of asm goto outputs

gcc/
	* cfgexpand.c (expand_asm_stmt): Output asm goto with outputs too.
	Place insns after asm goto on edges.
	* doc/extend.texi: Reflect the changes in asm goto documentation.
	* gimple.c (gimple_build_asm_1): Remove an assert checking output
	absence for asm goto.
	* gimple.h (gimple_asm_label_op, gimple_asm_set_label_op): Take
	possible asm goto outputs into account.
	* ira.c (ira): Remove critical edges for potential asm goto output
	reloads.
	(ira_nullify_asm_goto): New function.
	* ira.h (ira_nullify_asm_goto): New prototype.
	* lra-assigns.c (lra_split_hard_reg_for): Use ira_nullify_asm_goto.
	Check that splitting is done inside a basic block.
	* lra-constraints.c (curr_insn_transform): Permit output reloads
	for any jump insn.
	* lra-spills.c (lra_final_code_change): Remove USEs added in ira
	for asm gotos.
	* lra.c (lra_process_new_insns): Place output reload insns after
	jumps in the beginning of destination BBs.
	* reload.c (find_reloads): Report error for asm gotos with
	outputs.  Modify them to keep CFG consistency to avoid crashes.
	* tree-into-ssa.c (rewrite_stmt): Don't put debug stmt after asm
	goto.

gcc/c/
	* c-parser.c (c_parser_asm_statement): Parse outputs for asm
	goto too.
	* c-typeck.c (build_asm_expr): Remove an assert checking output
	absence for asm goto.

gcc/cp
	* parser.c (cp_parser_asm_definition): Parse outputs for asm
	goto too.

gcc/testsuite/
	* c-c++-common/asmgoto-2.c: Permit output in asm goto.
	* gcc.c-torture/compile/asmgoto-2.c: New.
	* gcc.c-torture/compile/asmgoto-3.c: New.
	* gcc.c-torture/compile/asmgoto-4.c: New.
	* gcc.c-torture/compile/asmgoto-5.c: New.

1 files changed, 4 insertions, 4 deletions

diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
index fbc47ba..f034c77 100644
--- a/gcc/lra-constraints.c
+++ b/gcc/lra-constraints.c
@@ -3954,10 +3954,10 @@ curr_insn_transform (bool check_only_p)
   no_input_reloads_p = no_output_reloads_p = false;
   goal_alt_number = -1;
   change_p = sec_mem_p = false;
-  /* JUMP_INSNs and CALL_INSNs are not allowed to have any output
-     reloads; neither are insns that SET cc0.  Insns that use CC0 are
-     not allowed to have any input reloads.  */
-  if (JUMP_P (curr_insn) || CALL_P (curr_insn))
+  /* CALL_INSNs are not allowed to have any output reloads; neither
+     are insns that SET cc0.  Insns that use CC0 are not allowed to
+     have any input reloads.  */
+  if (CALL_P (curr_insn))
     no_output_reloads_p = true;
 
   if (HAVE_cc0 && reg_referenced_p (cc0_rtx, PATTERN (curr_insn)))