[testsuite/guality] Use line number vars in gdb-test

2018-06-29  Tom de Vries  <tdevries@suse.de>

	* gcc.dg/guality/pr45882.c (foo): Add line number var for breakpoint
	line, and use it.
	* lib/gcc-dg.exp (get-absolute-line): Factor out of ...
	(process-message): ... here.
	* lib/gcc-gdb-test.exp (gdb-test): Use get-absolute-line.

From-SVN: r262248

gcc/testsuite/ChangeLog

+2018-06-29  Tom de Vries  <tdevries@suse.de>
+
+	* gcc.dg/guality/pr45882.c (foo): Add line number var for breakpoint
+	line, and use it.
+	* lib/gcc-dg.exp (get-absolute-line): Factor out of ...
+	(process-message): ... here.
+	* lib/gcc-gdb-test.exp (gdb-test): Use get-absolute-line.
+
 2018-06-29  Martin Liska  <mliska@suse.cz>
 
         PR tree-optimization/86263

gcc/testsuite/gcc.dg/guality/pr45882.c

@@ -9,11 +9,11 @@ volatile short int v;
 __attribute__((noinline,noclone,used)) int
 foo (int i, int j)
 {
-  int b = i;		/* { dg-final { gdb-test 16 "b" "7" } } */
-  int c = i + 4;	/* { dg-final { gdb-test 16 "c" "11" } } */
-  int d = a[i];		/* { dg-final { gdb-test 16 "d" "112" } } */
-  int e = a[i + 6];	/* { dg-final { gdb-test 16 "e" "142" } } */
-  ++v;
+  int b = i;		/* { dg-final { gdb-test bpline "b" "7" } } */
+  int c = i + 4;	/* { dg-final { gdb-test bpline "c" "11" } } */
+  int d = a[i];		/* { dg-final { gdb-test bpline "d" "112" } } */
+  int e = a[i + 6];	/* { dg-final { gdb-test bpline "e" "142" } } */
+  ++v;			/* { dg-line bpline } */
   return ++j;
 }
 

gcc/testsuite/lib/gcc-dg.exp

@@ -1039,23 +1039,24 @@ proc dg-line { linenr varname } {
     }
 }
 
-# Modify the regular expression saved by a DejaGnu message directive to
-# include a prefix and to force the expression to match a single line.
-# MSGPROC is the procedure to call.
-# MSGPREFIX is the prefix to prepend.
-# DGARGS is the original argument list.
+# Get the absolute line number corresponding to:
+# - a relative line number (a non-null useline is required), or
+# - a line number variable reference.
+# Argument 0 is the line number on which line was used
+# Argument 1 is the relative line number or line number variable reference
+#
+proc get-absolute-line { useline line } {
+    if { [regsub "^\.\[+-\](\[0-9\]+)$" $line "\\1" num] && $useline != "" } {
+	# Handle relative line specification, .+1 or .-1 etc.
+	set num [expr $useline [string index $line 1] $num]
+	return $num
+    }
 
-proc process-message { msgproc msgprefix dgargs } {
-    upvar dg-messages dg-messages
+    if { ! [regsub "^(\[a-zA-Z\]\[a-zA-Z0-9_\]*)$" $line "\\1" varname] } {
+	return $line
+    }
 
-    if { [llength $dgargs] == 5 } {
-	if { [regsub "^\.\[+-\](\[0-9\]+)$" [lindex $dgargs 4] "\\1" num] } {
-	    # Handle relative line specification, .+1 or .-1 etc.
-	    set num [expr [lindex $dgargs 0] [string index [lindex $dgargs 4] 1] $num]
-	    set dgargs [lreplace $dgargs 4 4 $num]
-	} elseif { [regsub "^(\[a-zA-Z\]\[a-zA-Z0-9_\]*)$" [lindex $dgargs 4] "\\1" varname] } {
     # Handle linenr variable defined by dg-line
-
     set org_varname $varname
     set varname "saved_linenr_$varname"
     eval global $varname
@@ -1063,8 +1064,11 @@ proc process-message { msgproc msgprefix dgargs } {
     # Generate used-but-not-defined error.
     eval set var_defined [info exists $varname]
     if { ! $var_defined } {
-		set linenr [expr [lindex $dgargs 0]]
-		error "dg-line var $org_varname used at line $linenr, but not defined"
+	if { "$useline" != "" } {
+	    error "dg-line var $org_varname used at line $uselinenr, but not defined"
+	} else {
+	    error "dg-line var $org_varname used, but not defined"
+	}
 	return
     }
 
@@ -1075,9 +1079,22 @@ proc process-message { msgproc msgprefix dgargs } {
 
     # Get line number from var and use it.
     eval set num \$$varname
+    set line $num
+}
+
+# Modify the regular expression saved by a DejaGnu message directive to
+# include a prefix and to force the expression to match a single line.
+# MSGPROC is the procedure to call.
+# MSGPREFIX is the prefix to prepend.
+# DGARGS is the original argument list.
+
+proc process-message { msgproc msgprefix dgargs } {
+    upvar dg-messages dg-messages
+
+    if { [llength $dgargs] == 5 } {
+	set num [get-absolute-line [lindex $dgargs 0] [lindex $dgargs 4]]
 	set dgargs [lreplace $dgargs 4 4 $num]
     }
-    }
 
     # Process the dg- directive, including adding the regular expression
     # to the new message entry in dg-messages.

gcc/testsuite/lib/gcc-gdb-test.exp

@@ -60,7 +60,8 @@ proc gdb-test { args } {
     set cmd_file "[file rootname [file tail $prog]].gdb"
 
     set fd [open $cmd_file "w"]
-    puts $fd "break [lindex $args 0]"
+    set line [get-absolute-line "" [lindex $args 0]]
+    puts $fd "break $line"
     puts $fd "run"
     puts $fd "$command $var"
     if { $command == "print" } {