MIPS/GAS: Improve bignum operand error diagnostics

Improve bignum operand error diagnostics for cases where a constant
would be accepted and report them as range errors, also indicating the
offending operand and instruction, e.g.:

$ cat bignum.s
	addiu	$2, 0x10000000000000000
	break	0x10000000000000000
$ as -o bignum.o bignum.s
bignum.s:1: Error: bignum invalid
bignum.s:2: Error: operand 1 must be constant `break 0x10000000000000000'
$

now show as:

$ as -o bignum.o bignum.s
bignum.s:1: Error: operand 2 out of range `addiu $2,0x10000000000000000'
bignum.s:2: Error: operand 1 out of range `break 0x10000000000000000'
$

	gas/
	* config/tc-mips.c (match_const_int): Call `match_out_of_range'
	rather than `match_not_constant' for unrelocated operands
	retrieved as an `O_big' expression.
	(match_int_operand): Call `match_out_of_range' for relocatable
	operands retrieved as an `O_big' expression.
	(match_mips16_insn): Call `match_out_of_range' for relaxable
	operands retrieved as an `O_big' expression.
	* testsuite/gas/mips/addiu-error.d: New test.
	* testsuite/gas/mips/mips16@addiu-error.d: New test.
	* testsuite/gas/mips/micromips@addiu-error.d: New test.
	* testsuite/gas/mips/break-error.d: New test.
	* testsuite/gas/mips/lui-1.l: Adjust error message.
	* testsuite/gas/mips/addiu-error.l: New stderr output.
	* testsuite/gas/mips/mips16@addiu-error.l: New stderr output.
	* testsuite/gas/mips/micromips@addiu-error.l: New stderr output.
	* testsuite/gas/mips/break-error.l: New stderr output.
	* testsuite/gas/mips/addiu-error.s: New test source.
	* testsuite/gas/mips/break-error.s: New test source.
	* testsuite/gas/mips/mips.exp: Run the new tests.

14 files changed, 109 insertions, 2 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 544ff7a..afbb20e 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,5 +1,27 @@
 2017-05-15  Maciej W. Rozycki  <macro@imgtec.com>
 
+	* config/tc-mips.c (match_const_int): Call `match_out_of_range'
+	rather than `match_not_constant' for unrelocated operands
+	retrieved as an `O_big' expression.
+	(match_int_operand): Call `match_out_of_range' for relocatable
+	operands retrieved as an `O_big' expression.
+	(match_mips16_insn): Call `match_out_of_range' for relaxable
+	operands retrieved as an `O_big' expression.
+	* testsuite/gas/mips/addiu-error.d: New test.
+	* testsuite/gas/mips/mips16@addiu-error.d: New test.
+	* testsuite/gas/mips/micromips@addiu-error.d: New test.
+	* testsuite/gas/mips/break-error.d: New test.
+	* testsuite/gas/mips/lui-1.l: Adjust error message.
+	* testsuite/gas/mips/addiu-error.l: New stderr output.
+	* testsuite/gas/mips/mips16@addiu-error.l: New stderr output.
+	* testsuite/gas/mips/micromips@addiu-error.l: New stderr output.
+	* testsuite/gas/mips/break-error.l: New stderr output.
+	* testsuite/gas/mips/addiu-error.s: New test source.
+	* testsuite/gas/mips/break-error.s: New test source.
+	* testsuite/gas/mips/mips.exp: Run the new tests.
+
+2017-05-15  Maciej W. Rozycki  <macro@imgtec.com>
+
 	* config/tc-mips.c (match_mips16_insn): Remove the explicit
 	OT_INTEGER check before the `match_expression' call.
 	* testsuite/gas/mips/mips16-insn-e.l: Adjust messages.
diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c
index ac4fefd..9fde462 100644
--- a/gas/config/tc-mips.c
+++ b/gas/config/tc-mips.c
@@ -4856,7 +4856,10 @@ match_const_int (struct mips_arg_info *arg, offsetT *value)
     *value = ex.X_add_number;
   else
     {
-      match_not_constant (arg);
+      if (r[0] == BFD_RELOC_UNUSED && ex.X_op == O_big)
+	match_out_of_range (arg);
+      else
+	match_not_constant (arg);
       return FALSE;
     }
   return TRUE;
@@ -5062,6 +5065,12 @@ match_int_operand (struct mips_arg_info *arg,
       if (!match_expression (arg, &offset_expr, offset_reloc))
 	return FALSE;
 
+      if (offset_expr.X_op == O_big)
+	{
+	  match_out_of_range (arg);
+	  return FALSE;
+	}
+
       if (offset_reloc[0] != BFD_RELOC_UNUSED)
 	/* Relocation operators were used.  Accept the argument and
 	   leave the relocation value in offset_expr and offset_relocs
@@ -8261,6 +8270,12 @@ match_mips16_insn (struct mips_cl_insn *insn, const struct mips_opcode *opcode,
 		  return FALSE;
 		}
 
+	      if (offset_expr.X_op == O_big)
+		{
+		  match_out_of_range (&arg);
+		  return FALSE;
+		}
+
 	      relax_char = c;
 	      continue;
 	    }
diff --git a/gas/testsuite/gas/mips/addiu-error.d b/gas/testsuite/gas/mips/addiu-error.d
new file mode 100644
index 0000000..13a99ac
--- /dev/null
+++ b/gas/testsuite/gas/mips/addiu-error.d
@@ -0,0 +1,3 @@
+#name: MIPS ADDIU errors
+#as: -32
+#error-output: addiu-error.l
diff --git a/gas/testsuite/gas/mips/addiu-error.l b/gas/testsuite/gas/mips/addiu-error.l
new file mode 100644
index 0000000..1dc0014
--- /dev/null
+++ b/gas/testsuite/gas/mips/addiu-error.l
@@ -0,0 +1,8 @@
+.*: Assembler messages:
+.*:5: Error: operand 2 out of range `addiu \$2,-32769'
+.*:6: Error: operand 2 out of range `addiu \$2,65536'
+.*:7: Error: operand 2 out of range `addiu \$2,0x10000000000000000'
+.*:8: Error: operand 2 must be an immediate expression `addiu \$2,\$3'
+.*:9: Error: invalid operands `addiu \$2,\(\$3\)'
+.*:10: Error: register value used as expression `addiu \$2,0\+\$3'
+.*:11: Error: register value used as expression `addiu \$2,\(\(\$3\)\)'
diff --git a/gas/testsuite/gas/mips/addiu-error.s b/gas/testsuite/gas/mips/addiu-error.s
new file mode 100644
index 0000000..1e19ea8
--- /dev/null
+++ b/gas/testsuite/gas/mips/addiu-error.s
@@ -0,0 +1,11 @@
+# Source code used to test error diagnostics with the ADDIU instruction.
+
+	.text
+foo:
+	addiu	$2, -32769
+	addiu	$2, 65536
+	addiu	$2, 0x10000000000000000
+	addiu	$2, $3
+	addiu	$2, ($3)
+	addiu	$2, 0+$3
+	addiu	$2, (($3))
diff --git a/gas/testsuite/gas/mips/break-error.d b/gas/testsuite/gas/mips/break-error.d
new file mode 100644
index 0000000..2110814
--- /dev/null
+++ b/gas/testsuite/gas/mips/break-error.d
@@ -0,0 +1,3 @@
+#name: MIPS BREAK errors
+#as: -32
+#error-output: break-error.l
diff --git a/gas/testsuite/gas/mips/break-error.l b/gas/testsuite/gas/mips/break-error.l
new file mode 100644
index 0000000..2759a91
--- /dev/null
+++ b/gas/testsuite/gas/mips/break-error.l
@@ -0,0 +1,8 @@
+.*: Assembler messages:
+.*:5: Error: operand 1 out of range `break -1'
+.*:6: Error: operand 1 out of range `break 65536'
+.*:7: Error: operand 1 out of range `break 0x10000000000000000'
+.*:8: Error: operand 1 must be an immediate expression `break \$3'
+.*:9: Error: invalid operands `break \(\$3\)'
+.*:10: Error: register value used as expression `break 0\+\$3'
+.*:11: Error: register value used as expression `break \(\(\$3\)\)'
diff --git a/gas/testsuite/gas/mips/break-error.s b/gas/testsuite/gas/mips/break-error.s
new file mode 100644
index 0000000..f5ac225
--- /dev/null
+++ b/gas/testsuite/gas/mips/break-error.s
@@ -0,0 +1,11 @@
+# Source code used to test error diagnostics with the BREAK instruction.
+
+	.text
+foo:
+	break	-1
+	break	65536
+	break	0x10000000000000000
+	break	$3
+	break	($3)
+	break	0+$3
+	break	(($3))
diff --git a/gas/testsuite/gas/mips/lui-1.l b/gas/testsuite/gas/mips/lui-1.l
index 8bf621d..d6cb98a 100644
--- a/gas/testsuite/gas/mips/lui-1.l
+++ b/gas/testsuite/gas/mips/lui-1.l
@@ -1,7 +1,7 @@
 .*\.s: Assembler messages:
 .*\.s:5: Error: operand 2 out of range `lui \$2,-1'
 .*\.s:6: Error: operand 2 out of range `lui \$2,65536'
-.*\.s:7: Error: bignum invalid
+.*\.s:7: Error: operand 2 out of range `lui \$2,0x10000000000000000'
 .*\.s:8: Error: operand 2 must be an immediate expression `lui \$2,\$3'
 .*\.s:9: Error: invalid operands `lui \$2,\(\$3\)'
 .*\.s:10: Error: register value used as expression `lui \$2,0\+\$3'
diff --git a/gas/testsuite/gas/mips/micromips@addiu-error.d b/gas/testsuite/gas/mips/micromips@addiu-error.d
new file mode 100644
index 0000000..0313261
--- /dev/null
+++ b/gas/testsuite/gas/mips/micromips@addiu-error.d
@@ -0,0 +1,4 @@
+#name: MIPS ADDIU errors
+#as: -32
+#error-output: micromips@addiu-error.l
+#source: addiu-error.s
diff --git a/gas/testsuite/gas/mips/micromips@addiu-error.l b/gas/testsuite/gas/mips/micromips@addiu-error.l
new file mode 100644
index 0000000..1527ead
--- /dev/null
+++ b/gas/testsuite/gas/mips/micromips@addiu-error.l
@@ -0,0 +1,8 @@
+.*: Assembler messages:
+.*:5: Error: operand 2 out of range `addiu \$2,-32769'
+.*:6: Error: operand 2 out of range `addiu \$2,65536'
+.*:7: Error: operand 2 out of range `addiu \$2,0x10000000000000000'
+.*:8: Error: operand 2 must be an immediate expression `addiu \$2,\$3'
+.*:9: Error: operand 2 out of range `addiu \$2,\(\$3\)'
+.*:10: Error: register value used as expression `addiu \$2,0\+\$3'
+.*:11: Error: register value used as expression `addiu \$2,\(\(\$3\)\)'
diff --git a/gas/testsuite/gas/mips/mips.exp b/gas/testsuite/gas/mips/mips.exp
index de38a1c..c9559df 100644
--- a/gas/testsuite/gas/mips/mips.exp
+++ b/gas/testsuite/gas/mips/mips.exp
@@ -1466,6 +1466,8 @@ if { [istarget mips*-*-vxworks*] } {
     run_dump_test_arches "lui"		[mips_arch_list_matching mips1]
     run_dump_test_arches "lui-1"	[mips_arch_list_matching mips1]
     run_dump_test_arches "lui-2"	[mips_arch_list_matching mips1]
+    run_dump_test_arches "addiu-error"	[mips_arch_list_all]
+    run_dump_test_arches "break-error"	[mips_arch_list_all]
 
     run_dump_test "r5900"
     run_dump_test "r5900-full"
diff --git a/gas/testsuite/gas/mips/mips16@addiu-error.d b/gas/testsuite/gas/mips/mips16@addiu-error.d
new file mode 100644
index 0000000..67b4611
--- /dev/null
+++ b/gas/testsuite/gas/mips/mips16@addiu-error.d
@@ -0,0 +1,4 @@
+#name: MIPS ADDIU errors
+#as: -32
+#error-output: mips16@addiu-error.l
+#source: addiu-error.s
diff --git a/gas/testsuite/gas/mips/mips16@addiu-error.l b/gas/testsuite/gas/mips/mips16@addiu-error.l
new file mode 100644
index 0000000..c7fd7c9
--- /dev/null
+++ b/gas/testsuite/gas/mips/mips16@addiu-error.l
@@ -0,0 +1,8 @@
+.*: Assembler messages:
+.*:5: Error: operand value out of range for instruction
+.*:6: Error: operand value out of range for instruction
+.*:7: Error: operand 2 out of range `addiu \$2,0x10000000000000000'
+.*:8: Error: operand 2 must be an immediate expression `addiu \$2,\$3'
+.*:9: Error: invalid operands `addiu \$2,\(\$3\)'
+.*:10: Error: register value used as expression `addiu \$2,0\+\$3'
+.*:11: Error: register value used as expression `addiu \$2,\(\(\$3\)\)'