re PR debug/32914 (ICE in rtl_for_decl_init with -g option)

	PR debug/32914
	* dwarf2out.c (rtl_for_decl_init): If vector decl has CONSTRUCTOR
	initializer, use build_vector_from_ctor if possible to create
	VECTOR_CST out of it.  If vector initializer is not VECTOR_CST
	even after this, return NULL.

	* d++.dg/debug/const3.C: New test.
	* d++.dg/debug/const4.C: New test.
	* d++.dg/debug/dwarf2/const1.C: New test.
	* d++.dg/debug/dwarf2/const2.C: New test.
	* d++.dg/debug/dwarf2/const2b.C: New test.

From-SVN: r127854

8 files changed, 77 insertions, 0 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a7e84cf..9f7fe58 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2007-08-28  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/32914
+	* dwarf2out.c (rtl_for_decl_init): If vector decl has CONSTRUCTOR
+	initializer, use build_vector_from_ctor if possible to create
+	VECTOR_CST out of it.  If vector initializer is not VECTOR_CST
+	even after this, return NULL.
+
 2007-08-28  Gabriel Dos Reis  <gdr@integrable-solutions.net>
 
 	* c-pretty-print.c (pp_c_constant): Handle COMPLEX_CST.
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index 0463f1f..e1b332f 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -10403,6 +10403,43 @@ rtl_for_decl_init (tree init, tree type)
   else if (initializer_constant_valid_p (init, type)
 	   && ! walk_tree (&init, reference_to_unused, NULL, NULL))
     {
+      /* Convert vector CONSTRUCTOR initializers to VECTOR_CST if
+	 possible.  */
+      if (TREE_CODE (type) == VECTOR_TYPE)
+	switch (TREE_CODE (init))
+	  {
+	  case VECTOR_CST:
+	    break;
+	  case CONSTRUCTOR:
+	    if (TREE_CONSTANT (init))
+	      {
+		VEC(constructor_elt,gc) *elts = CONSTRUCTOR_ELTS (init);
+		bool constant_p = true;
+		tree value;
+		unsigned HOST_WIDE_INT ix;
+
+		/* Even when ctor is constant, it might contain non-*_CST
+		   elements (e.g. { 1.0/0.0 - 1.0/0.0, 0.0 }) and those don't
+		   belong into VECTOR_CST nodes.  */
+		FOR_EACH_CONSTRUCTOR_VALUE (elts, ix, value)
+		  if (!CONSTANT_CLASS_P (value))
+		    {
+		      constant_p = false;
+		      break;
+		    }
+
+		if (constant_p)
+		  {
+		    init = build_vector_from_ctor (type, elts);
+		    break;
+		  }
+	      }
+	    /* FALLTHRU */
+
+	  default:
+	    return NULL;
+	  }
+
       rtl = expand_expr (init, NULL_RTX, VOIDmode, EXPAND_INITIALIZER);
 
       /* If expand_expr returns a MEM, it wasn't immediate.  */
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 690128f..49b1b9f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,12 @@
+2007-08-28  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/32914
+	* d++.dg/debug/const3.C: New test.
+	* d++.dg/debug/const4.C: New test.
+	* d++.dg/debug/dwarf2/const1.C: New test.
+	* d++.dg/debug/dwarf2/const2.C: New test.
+	* d++.dg/debug/dwarf2/const2b.C: New test.
+
 2007-08-28  Mircea Namolaru  <namolaru@il.ibm.com>
             Vladimir Yanovsky  <yanov@il.ibm.com>
             Revital Eres  <eres@il.ibm.com>
diff --git a/gcc/testsuite/g++.dg/debug/const3.C b/gcc/testsuite/g++.dg/debug/const3.C
new file mode 100644
index 0000000..375c548
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/const3.C
@@ -0,0 +1,3 @@
+/* { dg-do compile } */
+typedef float FloatVect __attribute__((__vector_size__(16)));
+const FloatVect Foo = { 250000000.0, 0.0, 0.0, 0.0 };
diff --git a/gcc/testsuite/g++.dg/debug/const4.C b/gcc/testsuite/g++.dg/debug/const4.C
new file mode 100644
index 0000000..ec8133d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/const4.C
@@ -0,0 +1,2 @@
+/* { dg-do compile } */
+const __complex__ int x = 2i;
diff --git a/gcc/testsuite/g++.dg/debug/dwarf2/const1.C b/gcc/testsuite/g++.dg/debug/dwarf2/const1.C
new file mode 100644
index 0000000..be23c10
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/dwarf2/const1.C
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-options "-O -gdwarf-2 -dA" } */
+/* { dg-final { scan-assembler "DW_AT_const_value" } } */
+
+extern void x ();
+void (* const f) () = x;
diff --git a/gcc/testsuite/g++.dg/debug/dwarf2/const2.C b/gcc/testsuite/g++.dg/debug/dwarf2/const2.C
new file mode 100644
index 0000000..27f4c26
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/dwarf2/const2.C
@@ -0,0 +1,6 @@
+/* { dg-do compile { target powerpc_altivec_ok } } */
+/* { dg-options "-O -gdwarf-2 -dA -maltivec" } */
+/* { dg-final { scan-assembler "DW_AT_const_value" } } */
+
+typedef float FloatVect __attribute__((__vector_size__(16)));
+const FloatVect Foo = { 250000000.0, 0.0, 0.0, 0.0 };
diff --git a/gcc/testsuite/g++.dg/debug/dwarf2/const2b.C b/gcc/testsuite/g++.dg/debug/dwarf2/const2b.C
new file mode 100644
index 0000000..593e080
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/dwarf2/const2b.C
@@ -0,0 +1,6 @@
+/* { dg-do compile { target i386*-*-* } } */
+/* { dg-options "-O -gdwarf-2 -dA -msse" } */
+/* { dg-final { scan-assembler "DW_AT_const_value" } } */
+
+typedef float FloatVect __attribute__((__vector_size__(16)));
+const FloatVect Foo = { 250000000.0, 0.0, 0.0, 0.0 };