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PR c/45969
authorjsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4>
Thu, 14 Oct 2010 15:48:52 +0000 (15:48 +0000)
committerjsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4>
Thu, 14 Oct 2010 15:48:52 +0000 (15:48 +0000)
* 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.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@165472 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/ChangeLog
gcc/c-typeck.c
gcc/testsuite/ChangeLog
gcc/testsuite/gcc.c-torture/compile/pr45969-1.c [new file with mode: 0644]

index 6c92f30..303ea78 100644 (file)
@@ -1,3 +1,9 @@
+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>
 
index 14bc281..fe10e8b 100644 (file)
@@ -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);
index fe240d4..a81938d 100644 (file)
@@ -1,3 +1,8 @@
+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
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr45969-1.c b/gcc/testsuite/gcc.c-torture/compile/pr45969-1.c
new file mode 100644 (file)
index 0000000..ccf68bc
--- /dev/null
@@ -0,0 +1,6 @@
+/* { dg-options "-std=c89" } */
+void crash() {
+    double l[4];
+    if((l[0]+l[2]) && (l[1]+l[3])){
+    }
+}