Use gdb_test_no_output for compile tests expected to pass

There is a small think-o in compile.exp:

if { $srcfile3 != "" } {
    gdb_test "p constvar" " = 3"
    gdb_test "info addr constvar" {Symbol "constvar" is constant\.}

    gdb_test "compile code globalvar = constvar;"; # INCORRECT
    gdb_test "print globalvar" " = 3" "print constvar value"
} else {
    untested "print constvar value"
}

The line marked INCORRECT runs a simple "compile code" which is expected
to succeed.  When this happens, the compile plug-in and GDB will not
output anything.  The use of gdb_test matches against anything.

This is certainly not the intent, and this patch corrects the two instances
of this in the file.  [The rest of gdb.compile looks okay.]

testsuite/ChangeLog:

	* gdb.compile/compile.exp: Use gdb_test_no_output for "compile code"
	tests expected to pass.

2 files changed, 7 insertions, 2 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 1b4dde5..84ef82f 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-08-16  Keith Seitz  <keiths@redhat.com>
+
+	* gdb.compile/compile.exp: Use gdb_test_no_output for "compile code"
+	tests expected to pass.
+
 2018-08-14  Jan Vrany  <jan.vrany@fit.cvut.cz>
 
 	* gdb.mi/mi-disassemble.exp (test_disassembly_only): Add tests for
diff --git a/gdb/testsuite/gdb.compile/compile.exp b/gdb/testsuite/gdb.compile/compile.exp
index 4303c02..2ed5577 100644
--- a/gdb/testsuite/gdb.compile/compile.exp
+++ b/gdb/testsuite/gdb.compile/compile.exp
@@ -256,7 +256,7 @@ gdb_test "print union_object.intfield" " = 7"
 # LOC_UNRESOLVED tests.
 
 gdb_test "print unresolved" " = 20"
-gdb_test "compile code globalvar = unresolved;"
+gdb_test_no_output "compile code globalvar = unresolved;"
 gdb_test "print globalvar" " = 20" "print unresolved value"
 
 # Test shadowing with global and static variables.
@@ -353,7 +353,7 @@ if { $srcfile3 != "" } {
     gdb_test "p constvar" " = 3"
     gdb_test "info addr constvar" {Symbol "constvar" is constant\.}
 
-    gdb_test "compile code globalvar = constvar;"
+    gdb_test_no_output "compile code globalvar = constvar;"
     gdb_test "print globalvar" " = 3" "print constvar value"
 } else {
     untested "print constvar value"