[PATCH] Fix ICE in adjust_bool_pattern (PR tree-optimizations/52891)

[Jakub Jelinek]

Hi!

This patch fixes ICE in adjust_bool_pattern, trueval in that case has
the vector type's element type, which is full precision of mode,
so when we see a smaller precision, we need to use build_nonstandard_type.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok
for trunk and 4.7 (where this is latent, as the pattern recognizer
doesn't do SLP there, but something similar could appear in loops)?

2012-04-20  Jakub Jelinek  <ja...@redhat.com>

        PR tree-optimizations/52891
        * tree-vect-patterns.c (adjust_bool_pattern): Use
        build_nonstandard_type even if rhs1 has unsigned INTEGER_TYPE,
        but with non-standard precision.

        * gcc.c-torture/compile/pr52891-1.c: New test.  
        * gcc.c-torture/compile/pr52891-2.c: New test.

--- gcc/tree-vect-patterns.c.jj 2012-04-19 11:09:13.000000000 +0200
+++ gcc/tree-vect-patterns.c    2012-04-20 14:39:52.597285475 +0200
@@ -2300,7 +2300,9 @@ adjust_bool_pattern (tree var, tree out_
     default:
       gcc_assert (TREE_CODE_CLASS (rhs_code) == tcc_comparison);
       if (TREE_CODE (TREE_TYPE (rhs1)) != INTEGER_TYPE
-         || !TYPE_UNSIGNED (TREE_TYPE (rhs1)))
+         || !TYPE_UNSIGNED (TREE_TYPE (rhs1))
+         || (TYPE_PRECISION (TREE_TYPE (rhs1))
+             != GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (rhs1)))))
        {
          enum machine_mode mode = TYPE_MODE (TREE_TYPE (rhs1));
          itype
--- gcc/testsuite/gcc.c-torture/compile/pr52891-1.c.jj  2012-04-20 
14:46:48.154737808 +0200
+++ gcc/testsuite/gcc.c-torture/compile/pr52891-1.c     2012-04-20 
14:46:23.000000000 +0200
@@ -0,0 +1,20 @@
+/* PR tree-optimizations/52891 */
+
+struct S
+{
+  int a;
+  struct T { unsigned c : 10; } b;
+} s;
+
+void
+bar (short x, short y, int **p)
+{
+  if ((x && y) + **p)
+    while (1);
+}
+
+void
+foo (int **p)
+{
+  bar (s.a, s.b.c, p);
+}
--- gcc/testsuite/gcc.c-torture/compile/pr52891-2.c.jj  2012-04-20 
14:46:51.199716933 +0200
+++ gcc/testsuite/gcc.c-torture/compile/pr52891-2.c     2012-04-20 
14:46:01.000000000 +0200
@@ -0,0 +1,12 @@
+/* PR tree-optimizations/52891 */
+
+struct __attribute__((packed)) S { unsigned s : 22; };
+struct __attribute__((packed)) T { struct S t; } c;
+int a, b, d;
+
+void
+foo (void)
+{
+  if (1 ? (!c.t.s & (d < 0)) < a : 0)
+    b = 0;
+}

        Jakub