re PR rtl-optimization/33148 (ICE in trunc_int_for_mode, at explow.c:56 during combine)

	PR rtl-optimization/33148
	* simplify-rtx.c (simplify_unary_operation_1): Only optimize
	(neg (lt X 0)) if X has scalar int mode.

	* gcc.c-torture/compile/20070827-1.c: New test.

From-SVN: r127959

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 30b9539200c5e76d8123d8b115943a8fbaa8e18c..d0dec77ba1710d9c9a06556adf11632ecad70053 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2007-08-31  Jakub Jelinek  <jakub@redhat.com>
 
+       PR rtl-optimization/33148
+       * simplify-rtx.c (simplify_unary_operation_1): Only optimize
+       (neg (lt X 0)) if X has scalar int mode.
+
        PR debug/32914
        * dwarf2out.c (rtl_for_decl_init): If vector decl has CONSTRUCTOR
        initializer, use build_vector_from_ctor if possible to create

diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index 10be1e18d767814729377e512febcdc2d368704a..b088d92087847d1425b8356b9129f0e334f7b00a 100644 (file)
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -589,7 +589,8 @@ simplify_unary_operation_1 (enum rtx_code code, enum machine_mode mode, rtx op)
       /* (neg (lt x 0)) is (ashiftrt X C) if STORE_FLAG_VALUE is 1.  */
       /* (neg (lt x 0)) is (lshiftrt X C) if STORE_FLAG_VALUE is -1.  */
       if (GET_CODE (op) == LT
-         && XEXP (op, 1) == const0_rtx)
+         && XEXP (op, 1) == const0_rtx
+         && SCALAR_INT_MODE_P (GET_MODE (XEXP (op, 0))))
        {
          enum machine_mode inner = GET_MODE (XEXP (op, 0));
          int isize = GET_MODE_BITSIZE (inner);

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 756ee3a1592339e5a63286334cbd0ef901c35f2b..591911f1e4ba260283623934436f8498e4651a66 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2007-08-31  Jakub Jelinek  <jakub@redhat.com>
 
+       PR rtl-optimization/33148
+       * gcc.c-torture/compile/20070827-1.c: New test.
+
        PR debug/32914
        * d++.dg/debug/const3.C: New test.
        * d++.dg/debug/const4.C: New test.

diff --git a/gcc/testsuite/gcc.c-torture/compile/20070827-1.c b/gcc/testsuite/gcc.c-torture/compile/20070827-1.c
new file mode 100644 (file)
index 0000000..5dd0099
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/20070827-1.c
@@ -0,0 +1,20 @@
+/* PR rtl-optimization/33148 */
+
+int
+foo (unsigned int *p, int *q, unsigned int w, unsigned int b)
+{
+  unsigned int i;
+  int mask;
+
+  if (q[0] < q[1])
+    mask = 0xff;
+  else
+    mask = 0;
+
+  for (i = 0; 8 * i < w; i++)
+    {
+      b ^= mask;
+      *p++ = b;
+    }
+  return 0;
+}