re PR c/45969 (ICE in build_binary_op, at c-typeck.c:9833)

	PR c/45969
	* c-typeck.c (build_binary_op): Don't try to compute a semantic
	type with excess precision for boolean operations.

testsuite:
	* gcc.c-torture/compile/pr45969-1.c: New test.

From-SVN: r165472

gcc/ChangeLog

+2010-10-14  Joseph Myers  <joseph@codesourcery.com>
+
+	PR c/45969
+	* c-typeck.c (build_binary_op): Don't try to compute a semantic
+	type with excess precision for boolean operations.
+
 2010-10-14  Jeremie Salvucci  <jeremie.salvucci@free.fr>
 	    Basile Starynkevitch  <basile@starynkevitch.net>
 

gcc/c-typeck.c

@@ -9423,6 +9423,10 @@ build_binary_op (location_t location, enum tree_code code,
      precision.  */
   bool may_need_excess_precision;
 
+  /* True means this is a boolean operation that converts both its
+     operands to truth-values.  */
+  bool boolean_op = false;
+
   if (location == UNKNOWN_LOCATION)
     location = input_location;
 
@@ -9650,6 +9654,7 @@ build_binary_op (location_t location, enum tree_code code,
 	  op0 = c_common_truthvalue_conversion (location, op0);
 	  op1 = c_common_truthvalue_conversion (location, op1);
 	  converted = 1;
+	  boolean_op = true;
 	}
       if (code == TRUTH_ANDIF_EXPR)
 	{
@@ -10192,7 +10197,8 @@ build_binary_op (location_t location, enum tree_code code,
   if (build_type == NULL_TREE)
     {
       build_type = result_type;
-      if (type0 != orig_type0 || type1 != orig_type1)
+      if ((type0 != orig_type0 || type1 != orig_type1)
+	  && !boolean_op)
 	{
 	  gcc_assert (may_need_excess_precision && common);
 	  semantic_result_type = c_common_type (orig_type0, orig_type1);

gcc/testsuite/ChangeLog

+2010-10-14  Joseph Myers  <joseph@codesourcery.com>
+
+	PR c/45969
+	* gcc.c-torture/compile/pr45969-1.c: New test.
+
 2010-10-14  Richard Guenther  <rguenther@suse.de>
 
 	PR lto/45382

gcc/testsuite/gcc.c-torture/compile/pr45969-1.c

+/* { dg-options "-std=c89" } */
+void crash() {
+    double l[4];
+    if((l[0]+l[2]) && (l[1]+l[3])){
+    }
+}