[gcc r11-5131] [PR97870] LRA: don't remove asm goto, just nullify it.

[Vladimir Makarov]

https://gcc.gnu.org/g:2f2709e691148160e4f88090eaf48d3e4915b0e4

commit r11-5131-g2f2709e691148160e4f88090eaf48d3e4915b0e4
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Wed Nov 18 10:07:56 2020 -0500

    [PR97870] LRA: don't remove asm goto, just nullify it.
    
    gcc/
    
    2020-11-18  Vladimir Makarov  <vmakarov@redhat.com>
    
            PR target/97870
            * lra-constraints.c (curr_insn_transform): Do not delete asm goto
            with wrong constraints.  Nullify it saving CFG.

Diff:
---
 gcc/lra-constraints.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
index f034c7749e9..80ca1e06e31 100644
--- a/gcc/lra-constraints.c
+++ b/gcc/lra-constraints.c
@@ -4104,9 +4104,18 @@ curr_insn_transform (bool check_only_p)
       error_for_asm (curr_insn,
 		     "inconsistent operand constraints in an %<asm%>");
       lra_asm_error_p = true;
-      /* Avoid further trouble with this insn.  Don't generate use
-	 pattern here as we could use the insn SP offset.  */
-      lra_set_insn_deleted (curr_insn);
+      if (! JUMP_P (curr_insn))
+	{
+	  /* Avoid further trouble with this insn.  Don't generate use
+	     pattern here as we could use the insn SP offset.  */
+	  lra_set_insn_deleted (curr_insn);
+	}
+      else
+	{
+	  lra_invalidate_insn_data (curr_insn);
+	  ira_nullify_asm_goto (curr_insn);
+	  lra_update_insn_regno_info (curr_insn);
+	}
       return true;
     }