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| author | Jakub Jelinek <jakub@redhat.com> | 2012-02-16 23:20:27 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2012-02-16 23:20:27 +0100 |
| commit | ca786352c5961c44a5aac91a47cb5a5d154c7be2 (patch) | |
| tree | 51d84de4276e6871cb16c3e6a7750115741287fa /gcc/tree-tailcall.c | |
| parent | 60a3da27fef24089ae0b77cc2a006c46419882a5 (diff) | |
| download | gcc-ca786352c5961c44a5aac91a47cb5a5d154c7be2.zip gcc-ca786352c5961c44a5aac91a47cb5a5d154c7be2.tar.gz gcc-ca786352c5961c44a5aac91a47cb5a5d154c7be2.tar.bz2 | |
re PR middle-end/52285 (libgcrypt _gcry_burn_stack slowdown)
PR tree-optimization/52285
* tree-tailcall.c (find_tail_calls): Ignore gimple_clobber_p stmts
when deciding if a call is a tail call or tail recursion.
From-SVN: r184317
Diffstat (limited to 'gcc/tree-tailcall.c')
| -rw-r--r-- | gcc/tree-tailcall.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gcc/tree-tailcall.c b/gcc/tree-tailcall.c index 87fc566..02e1113 100644 --- a/gcc/tree-tailcall.c +++ b/gcc/tree-tailcall.c @@ -1,5 +1,5 @@ /* Tail call optimization on trees. - Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 + Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. This file is part of GCC. @@ -400,9 +400,10 @@ find_tail_calls (basic_block bb, struct tailcall **ret) { stmt = gsi_stmt (gsi); - /* Ignore labels, returns and debug stmts. */ + /* Ignore labels, returns, clobbers and debug stmts. */ if (gimple_code (stmt) == GIMPLE_LABEL || gimple_code (stmt) == GIMPLE_RETURN + || gimple_clobber_p (stmt) || is_gimple_debug (stmt)) continue; @@ -523,6 +524,9 @@ find_tail_calls (basic_block bb, struct tailcall **ret) if (gimple_code (stmt) == GIMPLE_RETURN) break; + if (gimple_clobber_p (stmt)) + continue; + if (is_gimple_debug (stmt)) continue; |