pr20882 testcase

[Alan Modra]

-gdwarf-sections doesn't work on targets that lack support to emit
address size relative relocs.  The testcase as it was avoided
-gdwarf-sections doing anything by providing a non-empty .debug_line.
It's better to not use -gdwarf-sections.  Also, the testcase failed
to match the output for 16-bit address targets like avr, h8300, ip2k
and m68hc11.  This patch fixes the test for those targets.

The revised test also shows up relocation failures on crx and xgate.

	PR ld/20882
	* testsuite/ld-gc/pr20882.d: Don't pass -gdwarf-sections to gas.
	Allow for 16-bit address targets and match expected data fully.
	* testsuite/ld-gc/pr20882a.s: Delete .debug_line section.
	* testsuite/ld-gc/pr20882b.s: Likewise.
	* testsuite/ld-gc/pr20882c.s: Likewise.

diff --git a/ld/ChangeLog b/ld/ChangeLog
index b71bc16..c5892d1 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,12 @@
+2017-05-18  Alan Modra  <amodra@gmail.com>
+
+	PR ld/20882
+	* testsuite/ld-gc/pr20882.d: Don't pass -gdwarf-sections to gas.
+	Allow for 16-bit address targets and match expected data fully.
+	* testsuite/ld-gc/pr20882a.s: Delete .debug_line section.
+	* testsuite/ld-gc/pr20882b.s: Likewise.
+	* testsuite/ld-gc/pr20882c.s: Likewise.
+
 2017-05-17  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/20882
diff --git a/ld/testsuite/ld-gc/pr20882.d b/ld/testsuite/ld-gc/pr20882.d
index 55fa141..dd388c5 100644
--- a/ld/testsuite/ld-gc/pr20882.d
+++ b/ld/testsuite/ld-gc/pr20882.d
@@ -2,9 +2,8 @@
 #source: pr20882a.s
 #source: pr20882b.s
 #source: pr20882c.s
-#as: -gdwarf-sections
 #ld: --gc-sections -e main
 #readelf: -x .debug_info
 
 #...
- +0x0+ [0-9a-f ]+ 28 +.+\(
+  0x0+ (0a000000 00000000 |00000000 0000000a |06000000 |00000006 |0400|0004)28 .*
diff --git a/ld/testsuite/ld-gc/pr20882a.s b/ld/testsuite/ld-gc/pr20882a.s
index 3348ba9..aad12e8 100644
--- a/ld/testsuite/ld-gc/pr20882a.s
+++ b/ld/testsuite/ld-gc/pr20882a.s
@@ -1,11 +1,8 @@
 	.text
-	.globl  main
-	.type   main, %function
+	.globl	main
+	.type	main, %function
 main:
 	.byte 0
 
 	.section .debug_info,"",%progbits
 	.dc.a  t.c.4903c230+2
-
-	.section .debug_line,"",%progbits
-	.byte 0
diff --git a/ld/testsuite/ld-gc/pr20882b.s b/ld/testsuite/ld-gc/pr20882b.s
index fed521c..ea0cf2e 100644
--- a/ld/testsuite/ld-gc/pr20882b.s
+++ b/ld/testsuite/ld-gc/pr20882b.s
@@ -3,6 +3,3 @@
 	.globl t.c.4903c230
 t.c.4903c230:
 	.byte 0x28
-
-	.section .debug_line,"",%progbits
-	.byte 0
diff --git a/ld/testsuite/ld-gc/pr20882c.s b/ld/testsuite/ld-gc/pr20882c.s
index a77edad..44d27349 100644
--- a/ld/testsuite/ld-gc/pr20882c.s
+++ b/ld/testsuite/ld-gc/pr20882c.s
@@ -3,6 +3,3 @@
 	.globl t.c.4903c231
 t.c.4903c231:
 	.byte   0x29
-
-	.section .debug_line,"",%progbits
-	.byte 0

-- 
Alan Modra
Australia Development Lab, IBM