[gdb/testsuite] Fix gdb.base/store.exp with gcc-10

When running gdb.base/store.exp with gcc-10 instead of gcc-9, we have:
...
 (gdb) PASS: gdb.base/store.exp: continue to wack_double
 print l^M
-$22 = <optimized out>^M
+$22 = -1^M
-(gdb) UNSUPPORTED: gdb.base/store.exp: var double l; print old l, expecting -1
-(gdb) PASS: gdb.base/store.exp: var double l; print old l, expecting -1
+print r^M
+$23 = <optimized out>^M
+(gdb) FAIL: gdb.base/store.exp: var double l; print old r, expecting -2
...

With gcc-9, there's no location info for both l and r, but with gcc-10,
there's location info for l, but not r.

The test-case only checks for location info availability of l, and then
assumes location info for r is also available.

Fix this by allowing missing location info for r.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-06  Tom de Vries  <tdevries@suse.de>

	* gdb.base/store.exp (check_set, up_set): Allowing missing location
	info for r.

2 files changed, 41 insertions, 16 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index b2f90912502..7a62fe8ce77 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,5 +1,10 @@
 2020-05-06  Tom de Vries  <tdevries@suse.de>
 
+	* gdb.base/store.exp (check_set, up_set): Allowing missing location
+	info for r.
+
+2020-05-06  Tom de Vries  <tdevries@suse.de>
+
 	* gdb.base/shlib-call.exp: Add extra step to reach shmain.c:42, if
 	necessary.
 
diff --git a/gdb/testsuite/gdb.base/store.exp b/gdb/testsuite/gdb.base/store.exp
index 4708662bff9..f3a6c061457 100644
--- a/gdb/testsuite/gdb.base/store.exp
+++ b/gdb/testsuite/gdb.base/store.exp
@@ -55,26 +55,37 @@ proc check_set { t l r new add } {
 	}
     }
 
-    set supported 1
+    set supported_l 1
     set test "${prefix}; print old l, expecting ${l}"
     gdb_test_multiple "print l" "$test"  {
-	-re " = <optimized out>\r\n$gdb_prompt $" {
+	-re -wrap " = <optimized out>" {
 	    unsupported $test
-	    set supported 0
+	    set supported_l 0
 	}
-	-re " = ${l}\r\n$gdb_prompt $" {
+	-re -wrap " = ${l}" {
 	    pass $test
 	}
     }
-    if { $supported } {
-	gdb_test "print r" " = ${r}" \
-	    "${prefix}; print old r, expecting ${r}"
+
+    set test "${prefix}; print old r, expecting ${r}"
+    gdb_test_multiple "print r" "$test"  {
+	-re -wrap " = <optimized out>" {
+	    unsupported $test
+	}
+	-re -wrap " = ${r}" {
+	    pass $test
+	}
+    }
+
+    if { $supported_l } {
 	gdb_test_no_output "set variable l = 4" \
 	    "${prefix}; setting l to 4"
 	gdb_test "print l" " = ${new}" \
 	    "${prefix}; print new l, expecting ${new}"
-	gdb_test "next" "return l \\+ r;" \
-	    "${prefix}; next over add call"
+    }
+    gdb_test "next" "return l \\+ r;" \
+	"${prefix}; next over add call"
+    if { $supported_l } {
 	gdb_test "print l" " = ${add}" \
 	    "${prefix}; print incremented l, expecting ${add}"
     }
@@ -101,20 +112,29 @@ proc up_set { t l r new } {
     gdb_test "up" "l = add_${t} .l, r.;" \
 	"${prefix}; up"
 
-    set supported 1
+    set supported_l 1
     set test "${prefix}; print old l, expecting ${l}"
     gdb_test_multiple "print l" "$test"  {
-	-re " = <optimized out>\r\n$gdb_prompt $" {
+	-re -wrap " = <optimized out>" {
 	    unsupported $test
-	    set supported 0
+	    set supported_l 0
 	}
-	-re " = ${l}\r\n$gdb_prompt $" {
+	-re -wrap " = ${l}" {
 	    pass $test
 	}
     }
-    if { $supported } {
-	gdb_test "print r" " = ${r}" \
-	    "${prefix}; print old r, expecting ${r}"
+
+    set test "${prefix}; print old r, expecting ${r}"
+    gdb_test_multiple "print r" "$test"  {
+	-re -wrap " = <optimized out>" {
+	    unsupported $test
+	}
+	-re -wrap " = ${r}" {
+	    pass $test
+	}
+    }
+
+    if { $supported_l } {
 	gdb_test_no_output "set variable l = 4" \
 	    "${prefix}; set l to 4"
 	gdb_test "print l" " = ${new}" \