MIPS/GAS: Correct file option settings with `.insn'

This makes sure `HAVE_CODE_COMPRESSION' evaluates correctly when the
`.insn' directive is used at the beginning of a source file before any
instructions have been produced and that ELF file header's MIPS16 and
microMIPS ASE flags are set correctly in the case where no instructions
have been produced other than with the said directive.

	gas/
	* config/tc-mips.c (s_insn): Set file options.

	gas/testsuite/
	* gas/mips/insn-opts.d: New test.
	* gas/mips/insn-opts.s: New test source.
	* gas/mips/mips.exp: Run the new test.

6 files changed, 56 insertions, 0 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 4f923ed..d246494 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,7 @@
+2014-10-21  Maciej W. Rozycki  <macro@codesourcery.com>
+
+	* config/tc-mips.c (s_insn): Set file options.
+
 2014-10-21  Jan Beulich  <jbeulich@suse.com>
 
 	* read.c (HANDLE_CONDITIONAL_ASSEMBLY): New parameter "num_read".
diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c
index 8d4a80b..54442f4 100644
--- a/gas/config/tc-mips.c
+++ b/gas/config/tc-mips.c
@@ -16344,6 +16344,10 @@ s_cpadd (int ignore ATTRIBUTE_UNUSED)
 static void
 s_insn (int ignore ATTRIBUTE_UNUSED)
 {
+  file_mips_check_options ();
+  file_ase_mips16 |= mips_opts.mips16;
+  file_ase_micromips |= mips_opts.micromips;
+
   mips_mark_labels ();
 
   demand_empty_rest_of_line ();
diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog
index a79cd1c..4988b00 100644
--- a/gas/testsuite/ChangeLog
+++ b/gas/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2014-10-21  Maciej W. Rozycki  <macro@codesourcery.com>
+
+	* gas/mips/insn-opts.d: New test.
+	* gas/mips/insn-opts.s: New test source.
+	* gas/mips/mips.exp: Run the new test.
+
 2014-10-21  Jan Beulich  <jbeulich@suse.com>
 
 	* gas/gas/all/cond.s: Also test processing of leading double
diff --git a/gas/testsuite/gas/mips/insn-opts.d b/gas/testsuite/gas/mips/insn-opts.d
new file mode 100644
index 0000000..a61c95e
--- /dev/null
+++ b/gas/testsuite/gas/mips/insn-opts.d
@@ -0,0 +1,18 @@
+#objdump: -dtz -j .text --prefix-addresses --show-raw-insn
+#name: MIPS .insn default file options
+
+# Check that .insn at the beginning of assembly sees default file options
+# such as the ISA mode right.
+
+.*: +file format .*mips.*
+
+SYMBOL TABLE:
+0+000000 l    d  \.text	0+000000 \.text
+0+000000 g     F \.text	0+000004 foo
+0+000004 g     F \.text	0+000004 0x80 bar
+0+000008 g     O \.text	0+000004 baz
+
+Disassembly of section \.text:
+0+000000 <foo> 00000000 	nop
+0+000004 <bar> 0000 0000 	nop
+0+000008 <baz> .*
diff --git a/gas/testsuite/gas/mips/insn-opts.s b/gas/testsuite/gas/mips/insn-opts.s
new file mode 100644
index 0000000..a9ece0b
--- /dev/null
+++ b/gas/testsuite/gas/mips/insn-opts.s
@@ -0,0 +1,23 @@
+	.text
+
+	.globl	foo
+	.type	foo, @function
+foo:
+	.insn
+	.dc.l	0
+	.size	foo, . - foo
+
+	.set	micromips
+
+	.globl	bar
+	.type	bar, @function
+bar:
+	.insn
+	.dc.l	0
+	.size	bar, . - bar
+
+	.globl	baz
+	.type	baz, @object
+baz:
+	.dc.l	0
+	.size	baz, . - baz
diff --git a/gas/testsuite/gas/mips/mips.exp b/gas/testsuite/gas/mips/mips.exp
index 4afd367..5750b75 100644
--- a/gas/testsuite/gas/mips/mips.exp
+++ b/gas/testsuite/gas/mips/mips.exp
@@ -1134,6 +1134,7 @@ if { [istarget mips*-*-vxworks*] } {
     run_dump_test "align3"
     run_dump_test "odd-float"
     run_dump_test "ehword"
+    run_dump_test "insn-opts"
 
     run_list_test_arches "mips-macro-ill-sfp" "-32 -msingle-float" \
 					[mips_arch_list_matching mips2]