[gas][arm] Add -mwarn-restrict-it

Add a -m{no-}warn-restrict-it option to control IT related warnings in
ARMv8-A and ARMv8-R.  This is disabled by default.

Committed on behalf of Wilco Dijkstra.

gas/ChangeLog:
2019-12-11  Wilco Dijkstra  <wdijkstr@arm.com>

	* config/tc-arm.c (warn_on_restrict_it): Add new variable.
	(it_fsm_post_encode): Check warn_on_restrict_it.
	(arm_option_table): Add -mwarn-restrict-it/-mno-warn-restrict-it.
	* testsuite/gas/arm/armv8-2-fp16-scalar-bad.d: Add -mwarn-restrict-it.
	* testsuite/gas/arm/armv8-2-fp16-scalar-bad-ext.d: Likewise.
	* testsuite/gas/arm/armv8-a-bad.d: Likewise.
	* testsuite/gas/arm/armv8-a-it-bad.d: Likewise.
	* testsuite/gas/arm/armv8-r-bad.d: Likewise.
	* testsuite/gas/arm/armv8-r-it-bad.d: Likewise.
	* testsuite/gas/arm/sp-pc-validations-bad-t-v8a.d: Likewise.
	* testsuite/gas/arm/udf.d: Likewise.

8 files changed, 8 insertions, 8 deletions

diff --git a/gas/testsuite/gas/arm/armv8-2-fp16-scalar-bad-ext.d b/gas/testsuite/gas/arm/armv8-2-fp16-scalar-bad-ext.d
index b98e7cf..d904944 100644
--- a/gas/testsuite/gas/arm/armv8-2-fp16-scalar-bad-ext.d
+++ b/gas/testsuite/gas/arm/armv8-2-fp16-scalar-bad-ext.d
@@ -1,4 +1,4 @@
 #name: Invalid armv8.2-a scalar fp16
 #source: armv8-2-fp16-scalar-bad.s
-#as: -march=armv8.2-a+fp16
+#as: -march=armv8.2-a+fp16 -mwarn-restrict-it
 #error_output: armv8-2-fp16-scalar-bad.l
diff --git a/gas/testsuite/gas/arm/armv8-2-fp16-scalar-bad.d b/gas/testsuite/gas/arm/armv8-2-fp16-scalar-bad.d
index 13eb7c7..da625db 100644
--- a/gas/testsuite/gas/arm/armv8-2-fp16-scalar-bad.d
+++ b/gas/testsuite/gas/arm/armv8-2-fp16-scalar-bad.d
@@ -1,4 +1,4 @@
 #name: Invalid armv8.2-a scalar fp16
 #source: armv8-2-fp16-scalar-bad.s
-#as: -march=armv8.2-a+fp16 -mfpu=fp-armv8
+#as: -march=armv8.2-a+fp16 -mfpu=fp-armv8 -mwarn-restrict-it
 #error_output: armv8-2-fp16-scalar-bad.l
diff --git a/gas/testsuite/gas/arm/armv8-a-bad.d b/gas/testsuite/gas/arm/armv8-a-bad.d
index 302658d..45109ce 100644
--- a/gas/testsuite/gas/arm/armv8-a-bad.d
+++ b/gas/testsuite/gas/arm/armv8-a-bad.d
@@ -1,4 +1,4 @@
 #name: Invalid v8-a
 #source: armv8-ar-bad.s
-#as: -march=armv8-a
+#as: -march=armv8-a -mwarn-restrict-it
 #error_output: armv8-ar-bad.l
diff --git a/gas/testsuite/gas/arm/armv8-a-it-bad.d b/gas/testsuite/gas/arm/armv8-a-it-bad.d
index 43fc9f1..02788e0 100644
--- a/gas/testsuite/gas/arm/armv8-a-it-bad.d
+++ b/gas/testsuite/gas/arm/armv8-a-it-bad.d
@@ -1,4 +1,4 @@
 #name: Deprecated IT blocks (ARM v8)
 #source: armv8-ar-it-bad.s
 #error_output: armv8-ar-it-bad.l
-#as: -march=armv8-a -mimplicit-it=always
+#as: -march=armv8-a -mimplicit-it=always -mwarn-restrict-it
diff --git a/gas/testsuite/gas/arm/armv8-r-bad.d b/gas/testsuite/gas/arm/armv8-r-bad.d
index 150390b..b643c81 100644
--- a/gas/testsuite/gas/arm/armv8-r-bad.d
+++ b/gas/testsuite/gas/arm/armv8-r-bad.d
@@ -1,4 +1,4 @@
 #name: Invalid v8-r
 #source: armv8-ar-bad.s
-#as: -march=armv8-r
+#as: -march=armv8-r -mwarn-restrict-it
 #error_output: armv8-ar-bad.l
diff --git a/gas/testsuite/gas/arm/armv8-r-it-bad.d b/gas/testsuite/gas/arm/armv8-r-it-bad.d
index 5260ae0..c6f0c5b 100644
--- a/gas/testsuite/gas/arm/armv8-r-it-bad.d
+++ b/gas/testsuite/gas/arm/armv8-r-it-bad.d
@@ -1,4 +1,4 @@
 #name: Deprecated IT blocks (ARM v8)
 #source: armv8-ar-it-bad.s
 #error_output: armv8-ar-it-bad.l
-#as: -march=armv8-r -mimplicit-it=always
+#as: -march=armv8-r -mimplicit-it=always -mwarn-restrict-it
diff --git a/gas/testsuite/gas/arm/sp-pc-validations-bad-t-v8a.d b/gas/testsuite/gas/arm/sp-pc-validations-bad-t-v8a.d
index 8ca576b..41a6cdc 100644
--- a/gas/testsuite/gas/arm/sp-pc-validations-bad-t-v8a.d
+++ b/gas/testsuite/gas/arm/sp-pc-validations-bad-t-v8a.d
@@ -1,4 +1,4 @@
-# as: -march=armv8-a
+# as: -march=armv8-a -mwarn-restrict-it
 # name: Invalid SP and PC operands test - THUMB (v8a)
 # source: sp-pc-validations-bad-t.s
 # error_output: sp-pc-validations-bad-t-v8a.l
diff --git a/gas/testsuite/gas/arm/udf.d b/gas/testsuite/gas/arm/udf.d
index f53a437..a6a021e 100644
--- a/gas/testsuite/gas/arm/udf.d
+++ b/gas/testsuite/gas/arm/udf.d
@@ -1,6 +1,6 @@
 #objdump: -dr --prefix-addresses --show-raw-insn
 #name: UDF
-#as: -march=armv8-a
+#as: -march=armv8-a -mwarn-restrict-it
 #warning_output: udf.l
 #skip: *-*-pe *-*-wince