fix pr/45972

From-SVN: r165402

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b58a88183125537c500a8c917a2e37cd1a3453e7..9e11f72a6647dca235d1616067143ff4fa514f08 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2010-10-12  Xinliang David Li  <davidxl@google.com>
+
+       PR tree-optimization/45972
+       * gcc/tree-ssa-uninit.c (compute_uninit_opnds_pos): skip phis
+       with too many arguments.
+
 2010-10-12  Jakub Jelinek  <jakub@redhat.com>
 
        PR fortran/45636

diff --git a/gcc/tree-ssa-uninit.c b/gcc/tree-ssa-uninit.c
index 4398db7c6d2e8468c035bafee802af5b3b848042..78b88e9bd9345db54ef51e063ae3cda067b1bd19 100644 (file)
--- a/gcc/tree-ssa-uninit.c
+++ b/gcc/tree-ssa-uninit.c
@@ -149,6 +149,9 @@ compute_uninit_opnds_pos (gimple phi)
   unsigned uninit_opnds = 0;
 
   n = gimple_phi_num_args (phi);
+  /* Bail out for phi with too many args.  */
+  if (n > 32)
+    return 0;
 
   for (i = 0; i < n; ++i)
     {