Fix places in the AArch64 opcodes library code where a call to assert() has side effects.

	PR 27129
	* aarch64-dis.c (determine_disassembling_preference): Move call to
	aarch64_match_operands_constraint outside of the assertion.
	* aarch64-asm.c (aarch64_ins_limm_1): Remove call to assert.
	Replace with a return of FALSE.

3 files changed, 16 insertions, 7 deletions

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 0eef3ab55ea..8b25c41a843 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,5 +1,11 @@
 2021-01-08  Nick Clifton  <nickc@redhat.com>
 
+	PR 27129
+	* aarch64-dis.c (determine_disassembling_preference): Move call to
+	aarch64_match_operands_constraint outside of the assertion.
+	* aarch64-asm.c (aarch64_ins_limm_1): Remove call to assert.
+	Replace with a return of FALSE.
+
 	PR 27139
 	* aarch64-opc.c (aarch64_sys_regs): Treat id_aa64mmfr2_el1 as a
 	core system register.
diff --git a/opcodes/aarch64-asm.c b/opcodes/aarch64-asm.c
index 0eebf6bae2c..eae652e2714 100644
--- a/opcodes/aarch64-asm.c
+++ b/opcodes/aarch64-asm.c
@@ -545,18 +545,19 @@ aarch64_ins_limm_1 (const aarch64_operand *self,
 		    const aarch64_inst *inst, bfd_boolean invert_p,
 		    aarch64_operand_error *errors ATTRIBUTE_UNUSED)
 {
+  bfd_boolean res;
   aarch64_insn value;
   uint64_t imm = info->imm.value;
   int esize = aarch64_get_qualifier_esize (inst->operands[0].qualifier);
 
   if (invert_p)
     imm = ~imm;
-  /* The constraint check should have guaranteed this wouldn't happen.  */
-  assert (aarch64_logical_immediate_p (imm, esize, &value));
-
-  insert_fields (code, value, 0, 3, self->fields[2], self->fields[1],
-		 self->fields[0]);
-  return TRUE;
+  /* The constraint check should guarantee that this will work.  */
+  res = aarch64_logical_immediate_p (imm, esize, &value);
+  if (res)
+    insert_fields (code, value, 0, 3, self->fields[2], self->fields[1],
+		   self->fields[0]);
+  return res;
 }
 
 /* Insert logical/bitmask immediate for e.g. the last operand in
diff --git a/opcodes/aarch64-dis.c b/opcodes/aarch64-dis.c
index da1c96dadc1..19482f729ab 100644
--- a/opcodes/aarch64-dis.c
+++ b/opcodes/aarch64-dis.c
@@ -2729,8 +2729,10 @@ determine_disassembling_preference (struct aarch64_inst *inst,
 	     successfully converted to the form of ALIAS.  */
 	  if (convert_to_alias (&copy, alias) == 1)
 	    {
+	      int res;
 	      aarch64_replace_opcode (&copy, alias);
-	      assert (aarch64_match_operands_constraint (&copy, NULL));
+	      res = aarch64_match_operands_constraint (&copy, NULL);
+	      assert (res == 1);
 	      DEBUG_TRACE ("succeed with %s via conversion", alias->name);
 	      memcpy (inst, &copy, sizeof (aarch64_inst));
 	      return;