[Bug inline-asm/55934] [4.8 Regression] LRA inline asm error recovery

[steven at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55934



--- Comment #2 from Steven Bosscher <steven at gcc dot gnu.org> 2013-01-11 
12:49:16 UTC ---

This is trivially fixed with the following patch:



Index: lra-assigns.c

===================================================================

--- lra-assigns.c       (revision 195104)

+++ lra-assigns.c       (working copy)

@@ -1240,6 +1240,9 @@ assign_by_spills (void)

                  asm_p = true;

                  error_for_asm (insn,

                                 "%<asm%> operand has impossible constraints");

+                 /* Avoid further trouble with this insn.  */

+                 PATTERN (insn) = gen_rtx_USE (VOIDmode, const0_rtx);

+                 lra_set_insn_deleted (insn);

                }

            }

          lra_assert (asm_p);