From: Martin Jambor <mjambor@suse.cz>
Date: Fri, 21 Dec 2012 22:06:38 +0000 (+0100)
Subject: re PR tree-optimization/55355 (internal compiler error: in tree_low_cst, at tree... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=28afe3fc7b02e8dd8925d35c7d5f062712885d47;p=gcc.git

re PR tree-optimization/55355 (internal compiler error: in tree_low_cst, at tree.c:6415)

2012-12-21  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/55355
	* tree-sra.c (type_internals_preclude_sra_p): Also check that
	bit_position is small enough to fit a single HOST_WIDE_INT.

	* testsuite/g++.dg/torture/pr55355.C: New test.

From-SVN: r194682
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 21af1477892..8bc25edd86c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2012-12-21  Martin Jambor  <mjambor@suse.cz>
+
+	PR tree-optimization/55355
+	* tree-sra.c (type_internals_preclude_sra_p): Also check that
+	bit_position is small enough to fit a single HOST_WIDE_INT.
+
 2012-12-21  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* rtlanal.c (volatile_insn_p): Delete commented out code.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index cfbece022a9..3fa83c217a9 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2012-12-21  Martin Jambor  <mjambor@suse.cz>
+
+	PR tree-optimization/55355
+	* g++.dg/torture/pr55355.C: New test.
+
 2012-12-21  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR middle-end/55775
diff --git a/gcc/testsuite/g++.dg/torture/pr55355.C b/gcc/testsuite/g++.dg/torture/pr55355.C
new file mode 100644
index 00000000000..6d8f8b6be1e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr55355.C
@@ -0,0 +1,23 @@
+/* { dg-do compile } */
+
+struct A
+{
+    void funcA(void);
+};
+
+struct B {};
+
+struct C
+{
+    void funcC(void) { a_mp->funcA(); }
+
+    char buf_ma[268435456];
+    A   *a_mp;
+    B    b_m;
+};
+
+void
+func(C *c_p)
+{
+    c_p->funcC();
+}
diff --git a/gcc/tree-sra.c b/gcc/tree-sra.c
index 21d8a514117..286ef266920 100644
--- a/gcc/tree-sra.c
+++ b/gcc/tree-sra.c
@@ -714,7 +714,12 @@ type_internals_preclude_sra_p (tree type, const char **msg)
 	      {
 	        *msg = "structure field size not fixed";
 		return true;
-	      }	      
+	      }
+	    if (!host_integerp (bit_position (fld), 0))
+	      {
+	        *msg = "structure field size too big";
+		return true;
+	      }
 	    if (AGGREGATE_TYPE_P (ft)
 		    && int_bit_position (fld) % BITS_PER_UNIT != 0)
 	      {