Hi!

On Thu, 16 Jul 2015 12:23:52 -0400, Nathan Sidwell <nathan@acm.org> wrote:
> I've committed this patch to fix a bug in the worker spill/fill code.  We ended 
> up not incrementing the pointer, resulting in the stack frame being filled with 
> the same value.
> 
> Thanks to Jim for finding the failure.

Cesar had prepared a reduced test case, a slightly altered variant of
which I've now committed to gomp-4_0-branch in r225924:

commit ee7fb343a0d0dbd17ac8dc7d24048d8647e41232
Author: tschwinge <tschwinge@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Fri Jul 17 09:11:10 2015 +0000

    OpenACC: Add test case for worker state propagation handling the stack frame
    
    ... for problem that got addressed in r225896.
    
    	libgomp/
    	* testsuite/libgomp.oacc-c-c++-common/worker-partn-8.c: New file.
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gomp-4_0-branch@225924 138bc75d-0d04-0410-961f-82ee72b054a4
---
 libgomp/ChangeLog.gomp                             |  5 ++
 .../libgomp.oacc-c-c++-common/worker-partn-8.c     | 53 ++++++++++++++++++++++
 2 files changed, 58 insertions(+)

diff --git libgomp/ChangeLog.gomp libgomp/ChangeLog.gomp
index 0293ad5..ec943f5 100644
--- libgomp/ChangeLog.gomp
+++ libgomp/ChangeLog.gomp
@@ -1,4 +1,9 @@
 2015-07-17  Thomas Schwinge  <thomas@codesourcery.com>
+	    Cesar Philippidis  <cesar@codesourcery.com>
+
+	* testsuite/libgomp.oacc-c-c++-common/worker-partn-8.c: New file.
+
+2015-07-17  Thomas Schwinge  <thomas@codesourcery.com>
 
 	* testsuite/libgomp.oacc-c-c++-common/private-vars-loop-gang-5.c:
 	Remove XFAIL.
diff --git libgomp/testsuite/libgomp.oacc-c-c++-common/worker-partn-8.c libgomp/testsuite/libgomp.oacc-c-c++-common/worker-partn-8.c
new file mode 100644
index 0000000..e787947
--- /dev/null
+++ libgomp/testsuite/libgomp.oacc-c-c++-common/worker-partn-8.c
@@ -0,0 +1,53 @@
+/* { dg-additional-options "-O0" } */
+
+/* With -O0, variables are on the stack, not in registers.  Check that worker
+   state propagation handles the stack frame.  */
+
+int
+main (int argc, char *argv[])
+{
+  int w0 = 0;
+  int w1 = 0;
+  int w2 = 0;
+  int w3 = 0;
+  int w4 = 0;
+  int w5 = 0;
+  int w6 = 0;
+  int w7 = 0;
+
+  int i;
+
+#pragma acc parallel num_gangs (1) num_workers (8) copy (w0, w1, w2, w3, w4, w5, w6, w7)
+  {
+    int internal = 100;
+
+#pragma acc loop worker
+    for (i = 0; i < 8; i++)
+      {
+	switch (i)
+	  {
+	  case 0: w0 = internal; break;
+	  case 1: w1 = internal; break;
+	  case 2: w2 = internal; break;
+	  case 3: w3 = internal; break;
+	  case 4: w4 = internal; break;
+	  case 5: w5 = internal; break;
+	  case 6: w6 = internal; break;
+	  case 7: w7 = internal; break;
+	  default: break;
+	  }
+      }
+  }
+
+  if (w0 != 100
+      || w1 != 100
+      || w2 != 100
+      || w3 != 100
+      || w4 != 100
+      || w5 != 100
+      || w6 != 100
+      || w7 != 100)
+    __builtin_abort ();
+
+  return 0;
+}


Grüße,
 Thomas