Patch from David Mosberger to fix 32 host cross 64 target bug.

        * combine.c (simplify_logical, case AND): Only call
        simplify_and_const_int if the mode is no wider than HOST_WIDE_INT
	or the constant is positive.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@27517 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ea6fbbb..2f6b1a4 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+Mon Jun 14 12:57:38 1999  David Mosberger  <davidm@hpl.hp.com>
+
+        * combine.c (simplify_logical, case AND): Only call
+        simplify_and_const_int if the mode is no wider than HOST_WIDE_INT
+       or the constant is positive.
+
 Mon Jun 14 11:43:41 1999  Nick Clifton  <nickc@cygnus.com>
 
        * configure.in: Fix typo in rs6000-ibm-aix4 case.

diff --git a/gcc/combine.c b/gcc/combine.c
index 0b64a86..60e0ef2 100644 (file)
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -4902,7 +4902,12 @@ simplify_logical (x, last)
          && ! side_effects_p (op1))
        x = gen_binary (AND, mode, XEXP (XEXP (op0, 0), 0), op1);
 
-      if (GET_CODE (op1) == CONST_INT)
+      /* We can call simplify_and_const_int only if we don't lose
+        any (sign) bits when converting INTVAL (op1) to
+        "unsigned HOST_WIDE_INT".  */
+      if (GET_CODE (op1) == CONST_INT
+         && (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT
+             || INTVAL (op1) > 0))
        {
          x = simplify_and_const_int (x, mode, op0, INTVAL (op1));