Fix PR gas/26001 (pdp11-*-*)

PR gas/26001
* gas/config/tc-pdp11.c (parse_reg): Distinguish register names from
symbols that begin with a register name.
* gas/testsuite/gas/pdp11/pdp11.exp: Add test of such symbols.
* gas/testsuite/gas/pdp11/pr26001.s: Likewise.
* gas/testsuite/gas/pdp11/pr26001.d: Likewise.

3 files changed, 22 insertions, 0 deletions

diff --git a/gas/testsuite/gas/pdp11/pdp11.exp b/gas/testsuite/gas/pdp11/pdp11.exp
index e27dd05..65c6a05 100644
--- a/gas/testsuite/gas/pdp11/pdp11.exp
+++ b/gas/testsuite/gas/pdp11/pdp11.exp
@@ -23,4 +23,5 @@ if [expr [istarget "pdp11-*-*"]]  then {
     run_dump_test "absreloc"
     run_dump_test "pr14480"
     run_dump_test "pr23481"
+    run_dump_test "pr26001"
 }
diff --git a/gas/testsuite/gas/pdp11/pr26001.d b/gas/testsuite/gas/pdp11/pr26001.d
new file mode 100644
index 0000000..a6ccdef
--- /dev/null
+++ b/gas/testsuite/gas/pdp11/pr26001.d
@@ -0,0 +1,12 @@
+#name: PR 26001 - distinguish register names from symbols
+#objdump: -dw
+
+.*: +file format .*
+
+Disassembly of section .text:
+
+0+00 <start>:
+[ 	]+0:[ 	]+09f7 fffc[ 	]+jsr[ 	]+pc, 0 <start>
+[ 	]+4:[ 	]+1037 0004[ 	]+mov[ 	]+r0, \$c <space>
+[ 	]+8:[ 	]+1dc1 0002[ 	]+mov[ 	]+\$e <r00f>, r1
+#pass
diff --git a/gas/testsuite/gas/pdp11/pr26001.s b/gas/testsuite/gas/pdp11/pr26001.s
new file mode 100644
index 0000000..44faa14
--- /dev/null
+++ b/gas/testsuite/gas/pdp11/pr26001.s
@@ -0,0 +1,9 @@
+	.text
+	.globl	sprintf
+start:	jsr	pc,sprintf
+	mov	r0,space
+	mov	r00f,r1
+	.data
+space:	.word	0
+r00f:	.word	0
+	.end