From 06e224f7e851bf8bf6bb5adfe52ae99de43197aa Mon Sep 17 00:00:00 2001
From: Alexandre Oliva <aoliva@redhat.com>
Date: Tue, 26 Feb 2002 19:05:26 +0000
Subject: [PATCH] dwarf2out.c (gen_inlined_subroutine_die): If block is
 abstract, generate a die for the lexical block.

* dwarf2out.c (gen_inlined_subroutine_die): If block is abstract,
generate a die for the lexical block.

From-SVN: r50056
---
 gcc/ChangeLog                           |  5 +++
 gcc/dwarf2out.c                         | 14 ++++++
 gcc/testsuite/ChangeLog                 |  4 ++
 gcc/testsuite/gcc.dg/debug/20020224-1.c | 60 +++++++++++++++++++++++++
 4 files changed, 83 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/debug/20020224-1.c

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 670aafd4375..2918066933c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2002-02-26  Alexandre Oliva  <aoliva@redhat.com>
+
+	* dwarf2out.c (gen_inlined_subroutine_die): If block is abstract,
+	generate a die for the lexical block.
+
 2002-02-26  Kazu Hirata  <kazu@hxi.com>
 
 	* config/h8300/h8300-protos.h: Add a prototype for
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index 6313aeba2f4..f4c298a124a 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -10579,6 +10579,20 @@ gen_inlined_subroutine_die (stmt, context_die, depth)
       decls_for_scope (stmt, subr_die, depth);
       current_function_has_inlines = 1;
     }
+  else
+    /* We may get here if we're the outer block of function A that was
+       inlined into function B that was inlined into function C.  When
+       generating debugging info for C, dwarf2out_abstract_function(B)
+       would mark all inlined blocks as abstract, including this one.
+       So, we wouldn't (and shouldn't) expect labels to be generated
+       for this one.  Instead, just emit debugging info for
+       declarations within the block.  This is particularly important
+       in the case of initializers of arguments passed from B to us:
+       if they're statement expressions containing declarations, we
+       wouldn't generate dies for their abstract variables, and then,
+       when generating dies for the real variables, we'd die (pun
+       intended :-)  */
+    gen_lexical_block_die (stmt, context_die, depth);
 }
 
 /* Generate a DIE for a field in a record, or structure.  */
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d0790f59710..8505241abef 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2002-02-26  Alexandre Oliva  <aoliva@redhat.com>
+
+	* gcc.dg/debug/20020224-1.c: New.
+
 2002-02-25  Kazu Hirata  <kazu@hxi.com>
 
 	* gcc.c-torture/execute/960416-1.x: New.
diff --git a/gcc/testsuite/gcc.dg/debug/20020224-1.c b/gcc/testsuite/gcc.dg/debug/20020224-1.c
new file mode 100644
index 00000000000..c61a17aed10
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/debug/20020224-1.c
@@ -0,0 +1,60 @@
+/* { dg-do compile } */
+
+/* Here's the deal: f3 is not inlined because it's too big, but f2 and
+   f1 are inlined into it.  We used to fail to emit debugging info for
+   t1, because it was moved inside the (inlined) block of f1, marked
+   as abstract, then we'd crash.  */
+
+#define UNUSED __attribute__((unused))
+#define EXT __extension__
+
+int undef(void);
+
+inline static void
+f1 (int i UNUSED)
+{
+}
+
+inline static void
+f2 (void)
+{
+  f1 (EXT ({ int t1 UNUSED; undef (); }));
+}
+
+inline static void
+f3 (void)
+{
+  int v1 UNUSED;
+  int v2 UNUSED;
+
+  EXT ({ int t2 UNUSED; if (0) undef (); 0; })
+    && EXT ({ int t3 UNUSED; if (0) undef (); 0; });
+
+  if (1)
+    {
+      undef ();
+      if (1)
+        f2 ();
+    }
+
+  {
+    undef ();
+  }
+}
+
+inline static void
+f4 (void)
+{
+  EXT ({ undef (); 1; }) && EXT ({ int t4 UNUSED = ({ 1; }); 1; });
+
+  { }
+
+  EXT ({ int t5 UNUSED; if (0) undef (); 0; });
+
+  f4 ();
+
+  undef ();
+  f3 ();
+
+  return;
+}
-- 
2.30.2