testsuite: Support filtering targets by TCL procedure in `run_dump_test'

Implement a more complex way of selecting targets to include or exclude
with `run_dump_test' cases, by extending the syntax for the `target',
`not-target', `skip' and `not-skip' options (with the binutils and GAS
test suites) and the `target', `alltargets' and `notarget' options (with
the LD test suite) to also accept a name of a TCL procedure instead of a
target triplet glob matching expression.  The result, 1 or 0, of the
procedure determines whether the test is to be run or not.  This mimics
and expands `dg-require-effective-target' from the GCC test suite.

Names of TCL procedures are supplied in square brackets `[]' as with TCL
procedure calls, observing that target triplet glob matching expressions
do not normally start and end with matching square brackets both at a
time.  Arguments for procedures are allowed if required.

Having a way to specify a complex condition for a `run_dump_test' case
to run has the advantage of keeping it local within the test case itself
where tool options related to the check might be also present, removing
the need to wrap `run_dump_test' calls into an `if' block whose only
reason is to do a feature check, and ultimately lets one have the test
reported as UNSUPPORTED automagically if required (not currently
supported by the `run_dump_test' options used for LD).

	binutils/
	* testsuite/lib/binutils-common.exp (match_target): New procedure.
	* testsuite/lib/utils-lib.exp (run_dump_test): Use it in place
	of `istarget' for matching with `target', `not-target', `skip'
	and `not-skip' options.

	gas/
	* testsuite/lib/gas-defs.exp (run_dump_test): Use `match_target'
	in place of `istarget' for matching with `target', `not-target',
	`skip' and `not-skip' options.

	ld/
	* testsuite/lib/ld-lib.exp (run_dump_test): Use `match_target'
	in place of `istarget' for matching with `target', `alltargets'
	and `notarget' options.

3 files changed, 40 insertions, 18 deletions

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index 3b98be4..ec97a0d 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,10 @@
+2018-04-27  Maciej W. Rozycki  <macro@mips.com>
+
+	* testsuite/lib/binutils-common.exp (match_target): New procedure.
+	* testsuite/lib/utils-lib.exp (run_dump_test): Use it in place
+	of `istarget' for matching with `target', `not-target', `skip'
+	and `not-skip' options.
+
 2018-04-26  Nick Clifton  <nickc@redhat.com>
 
 	* readelf.c (is_32bit_abs_reloc): Support R_PARISC_DIR32 as a
diff --git a/binutils/testsuite/lib/binutils-common.exp b/binutils/testsuite/lib/binutils-common.exp
index 48f1420..e6d9f40 100644
--- a/binutils/testsuite/lib/binutils-common.exp
+++ b/binutils/testsuite/lib/binutils-common.exp
@@ -127,6 +127,17 @@ proc is_elf64 { binary_file } {
     return 0
 }
 
+# True if the target matches TARGET, specified as a TCL procedure if
+# in square brackets or as machine triplet otherwise.
+#
+proc match_target { target } {
+   if [string match {\[*\]} $target] {
+	return $target
+   } else {
+	return [istarget $target]
+   }
+}
+
 # True if the ELF target supports STB_GNU_UNIQUE with the ELF header's
 # OSABI field set to ELFOSABI_GNU.
 #
diff --git a/binutils/testsuite/lib/utils-lib.exp b/binutils/testsuite/lib/utils-lib.exp
index cb12112..ede77b2 100644
--- a/binutils/testsuite/lib/utils-lib.exp
+++ b/binutils/testsuite/lib/utils-lib.exp
@@ -224,20 +224,24 @@ proc exe_ext {} {
 #	is useful if several .d files differ by options only.  Options are
 #	always read from FILE.d.
 #
-#   target: GLOBS...
-#       Run this test only on a specified list of targets.  More precisely,
-#       each glob in the space-separated list is passed to "istarget"; if
-#       it evaluates true for any of them, the test will be run, otherwise
-#       it will be marked unsupported.
-#
-#   not-target: GLOBS...
-#       Do not run this test on a specified list of targets.  Again,
-#       the each glob in the space-separated list is passed to
-#       "istarget", and the test is run if it evaluates *false* for
-#       *all* of them.  Otherwise it will be marked unsupported.
-#
-#   skip: GLOBS...
-#   not-skip: GLOBS...
+#   target: GLOB|PROC ...
+#	Run this test only on a specified list of targets.  More precisely,
+#	in the space-separated list each glob is passed to "istarget" and
+#	each proc is called as a TCL procedure.  List items are interpreted
+#	such that procs are denoted by surrounding square brackets, and any
+#	other items are consired globs.  If the call evaluates true for any
+#	of them, the test will be run, otherwise it will be marked
+#	unsupported.
+#
+#   not-target: GLOB|PROC ...
+#	Do not run this test on a specified list of targets.  Again, each
+#	glob in the space-separated list is passed to "istarget" and each
+#	proc is called as a TCL procedure, and the test is run if it
+#	evaluates *false* for *all* of them.  Otherwise it will be marked
+#	unsupported.
+#
+#   skip: GLOB|PROC ...
+#   not-skip: GLOB|PROC ...
 #       These are exactly the same as "not-target" and "target",
 #       respectively, except that they do nothing at all if the check
 #       fails.  They should only be used in groups, to construct a single
@@ -445,13 +449,13 @@ proc run_dump_test { name {extra_options {}} } {
 	    return
 	}
 	foreach glob $opts(skip) {
-	    if {[istarget $glob]} { return }
+	    if {[match_target $glob]} { return }
 	}
     }
     if { $opts(not-skip) != "" } then {
 	set skip 1
 	foreach glob $opts(not-skip) {
-	    if {[istarget $glob]} {
+	    if {[match_target $glob]} {
 		set skip 0
 		break
 	    }
@@ -461,7 +465,7 @@ proc run_dump_test { name {extra_options {}} } {
     if { $opts(target) != "" } then {
 	set skip 1
 	foreach glob $opts(target) {
-	    if {[istarget $glob]} {
+	    if {[match_target $glob]} {
 		set skip 0
 		break
 	    }
@@ -473,7 +477,7 @@ proc run_dump_test { name {extra_options {}} } {
     }
     if { $opts(not-target) != "" } then {
 	foreach glob $opts(not-target) {
-	    if {[istarget $glob]} {
+	    if {[match_target $glob]} {
 		unsupported $testname
 		return
 	    }