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| author | Jakub Jelinek <jakub@redhat.com> | 2010-11-03 10:49:16 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2010-11-03 10:49:16 +0100 |
| commit | 71056fef3b000a8b1e4793b3aa064c033588908f (patch) | |
| tree | 7b8b7d7ad30b46e210beddd0a1730b34001839c7 /gcc/cfgloopmanip.c | |
| parent | 48215350c24d524b635d6110eca1e70996f5fb82 (diff) | |
| download | gcc-71056fef3b000a8b1e4793b3aa064c033588908f.tar.gz | |
re PR tree-optimization/46107 (-ftree-loop-distribute-patterns caused verify_loop_structure problem)
PR tree-optimization/46107
* cfgloopmanip.c (loop_version): Set irred_flag back into entry->flags
if cfg_hook_duplicate_loop_to_header_edge failed.
* gcc.c-torture/compile/pr46107.c: New test.
From-SVN: r166234
Diffstat (limited to 'gcc/cfgloopmanip.c')
| -rw-r--r-- | gcc/cfgloopmanip.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gcc/cfgloopmanip.c b/gcc/cfgloopmanip.c index 4363cc51f64..aa9ab66454e 100644 --- a/gcc/cfgloopmanip.c +++ b/gcc/cfgloopmanip.c @@ -1,6 +1,6 @@ /* Loop manipulation code for GNU compiler. - Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009 Free Software - Foundation, Inc. + Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010 + Free Software Foundation, Inc. This file is part of GCC. @@ -1538,7 +1538,10 @@ loop_version (struct loop *loop, /* Duplicate loop. */ if (!cfg_hook_duplicate_loop_to_header_edge (loop, entry, 1, NULL, NULL, NULL, 0)) - return NULL; + { + entry->flags |= irred_flag; + return NULL; + } /* After duplication entry edge now points to new loop head block. Note down new head as second_head. */ |