[Bug debug/32914] New: ICE with -g option

[dwarak dot rajagopal at amd dot com]

Testcase
"test-ice.cpp"

#include <iostream>
#include <emmintrin.h>

const __m128i tmp={0,0};

g++ -O3 -g -c -msse2 test-ice.cpp

I get the following error:
test-ice.cpp:5: internal compiler error: in rtl_for_decl_init, at
dwarf2out.c:10071
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

It compiles fine with "-g" option. This issue is there even in 4.3 mainline as
well.

I tracked this problem to this patch
(http://gcc.gnu.org/ml/gcc-patches/2006-03/msg01567.html). 

Using the following temporary patch fixes this issue. I was basically reverting
the line which causes this issue.

--- dwarf2out.c.orig    2007-07-25 10:29:24.790178000 -0500
+++ dwarf2out.c 2007-07-25 10:21:41.378252000 -0500
@@ -10065,8 +10065,8 @@ rtl_for_decl_init (tree init, tree type)
      immediate RTL constant, expand it now.  We must be careful not to
      reference variables which won't be output.  */

-  else if (initializer_constant_valid_p (init, type)
-          && ! walk_tree (&init, reference_to_unused,NULL,NULL)
+    else if ((INTEGRAL_TYPE_P (type) || SCALAR_FLOAT_TYPE_P (type))
+            && initializer_constant_valid_p (init, type))
     {
       rtl = expand_expr (init, NULL_RTX, VOIDmode, EXPAND_INITIALIZER);

Thanks,
- Dwarak


-- 
           Summary: ICE with -g option
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dwarak dot rajagopal at amd dot com
 GCC build triplet: x86_64
  GCC host triplet: x86_64
GCC target triplet: x86_64


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32914