re PR middle-end/71693 (ICE: verify_gimple failed (type mismatch in shift expression...

	PR middle-end/71693
	* fold-const.c (fold_binary_loc) <case RROTATE_EXPR>: Cast
	TREE_OPERAND (arg0, 0) and TREE_OPERAND (arg0, 1) to type
	first when permuting bitwise operation with rotate.  Cast
	TREE_OPERAND (arg0, 0) to type when cancelling two rotations.

	* gcc.c-torture/compile/pr71693.c: New test.

From-SVN: r237875

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 308fcc8604987c6529158e141092307445609c0b..8d00f72c34d30b837280b214142884fb352622ff 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2016-06-30  Jakub Jelinek  <jakub@redhat.com>
+
+       PR middle-end/71693
+       * fold-const.c (fold_binary_loc) <case RROTATE_EXPR>: Cast
+       TREE_OPERAND (arg0, 0) and TREE_OPERAND (arg0, 1) to type
+       first when permuting bitwise operation with rotate.  Cast
+       TREE_OPERAND (arg0, 0) to type when cancelling two rotations.
+
 2016-06-29  David Malcolm  <dmalcolm@redhat.com>
 
        * opts.c (handle_param): Use find_param_fuzzy to offer suggestions

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 3b9500dafe65a79cffc1a7c64c941b86c4e568c0..f97b8bf6978d3cf69c21991d0b95619fa4108a82 100644 (file)
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -10294,11 +10294,15 @@ fold_binary_loc (location_t loc,
              || TREE_CODE (arg0) == BIT_IOR_EXPR
              || TREE_CODE (arg0) == BIT_XOR_EXPR)
          && TREE_CODE (TREE_OPERAND (arg0, 1)) == INTEGER_CST)
-       return fold_build2_loc (loc, TREE_CODE (arg0), type,
-                           fold_build2_loc (loc, code, type,
-                                        TREE_OPERAND (arg0, 0), arg1),
-                           fold_build2_loc (loc, code, type,
-                                        TREE_OPERAND (arg0, 1), arg1));
+       {
+         tree arg00 = fold_convert_loc (loc, type, TREE_OPERAND (arg0, 0));
+         tree arg01 = fold_convert_loc (loc, type, TREE_OPERAND (arg0, 1));
+         return fold_build2_loc (loc, TREE_CODE (arg0), type,
+                                 fold_build2_loc (loc, code, type,
+                                                  arg00, arg1),
+                                 fold_build2_loc (loc, code, type,
+                                                  arg01, arg1));
+       }
 
       /* Two consecutive rotates adding up to the some integer
         multiple of the precision of the type can be ignored.  */
@@ -10307,7 +10311,7 @@ fold_binary_loc (location_t loc,
          && TREE_CODE (TREE_OPERAND (arg0, 1)) == INTEGER_CST
          && wi::umod_trunc (wi::add (arg1, TREE_OPERAND (arg0, 1)),
                             prec) == 0)
-       return TREE_OPERAND (arg0, 0);
+       return fold_convert_loc (loc, type, TREE_OPERAND (arg0, 0));
 
       return NULL_TREE;
 

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8069c679666810fae2ee9fe6f0461a362c4a2902..1828ca63fe4347ea571648d35dec5eefb1d99397 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2016-06-30  Jakub Jelinek  <jakub@redhat.com>
+
+       PR middle-end/71693
+       * gcc.c-torture/compile/pr71693.c: New test.
+
 2016-06-29  David Malcolm  <dmalcolm@redhat.com>
 
        * gcc.dg/spellcheck-params.c: New testcase.

diff --git a/gcc/testsuite/gcc.c-torture/compile/pr71693.c b/gcc/testsuite/gcc.c-torture/compile/pr71693.c
new file mode 100644 (file)
index 0000000..fc9249c
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr71693.c
@@ -0,0 +1,10 @@
+/* PR middle-end/71693 */
+
+unsigned short v;
+
+void
+foo (int x)
+{
+  v = ((((unsigned short) (0x0001 | (x & 0x0070) | 0x0100) & 0x00ffU) << 8)
+       | (((unsigned short) (0x0001 | (x & 0x0070) | 0x0100) >> 8) & 0x00ffU));
+}