Mercurial > hg > truffle

diff src/share/vm/opto/loopopts.cpp @ 4779:c8d8e124380c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
7064302: JDK7 build 147 crashed after testing my java 6-compiled web app Summary: Don't split CMove node if it's control edge is different from split region. Reviewed-by: never
author kvn
date Thu, 12 Jan 2012 12:28:59 -0800
parents 670a74b863fc
children 5e990493719e
line wrap: on
line diff
--- a/src/share/vm/opto/loopopts.cpp	Tue Jan 10 18:05:38 2012 -0800
+++ b/src/share/vm/opto/loopopts.cpp	Thu Jan 12 12:28:59 2012 -0800
@@ -819,6 +819,8 @@
     if( iff->is_If() ) {        // Classic split-if?
       if( iff->in(0) != n_ctrl ) return; // Compare must be in same blk as if
     } else if (iff->is_CMove()) { // Trying to split-up a CMOVE
+      // Can't split CMove with different control edge.
+      if (iff->in(0) != NULL && iff->in(0) != n_ctrl ) return;
       if( get_ctrl(iff->in(2)) == n_ctrl ||
           get_ctrl(iff->in(3)) == n_ctrl )
         return;                 // Inputs not yet split-up
@@ -937,7 +939,7 @@
       }
       bool did_break = (i < imax);  // Did we break out of the previous loop?
       if (!did_break && n->outcnt() > 1) { // All uses in outer loops!
-        Node *late_load_ctrl;
+        Node *late_load_ctrl = NULL;
         if (n->is_Load()) {
           // If n is a load, get and save the result from get_late_ctrl(),
           // to be later used in calculating the control for n's clones.