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
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@ -1,3 +1,9 @@
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2012-02-16 Jakub Jelinek <jakub@redhat.com>
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PR tree-optimization/52285
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* tree-tailcall.c (find_tail_calls): Ignore gimple_clobber_p stmts
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when deciding if a call is a tail call or tail recursion.
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2012-02-16 Kai Tietz <ktietz@redhat.com>
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2012-02-16 Kai Tietz <ktietz@redhat.com>
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* config/i386/i386.c (legitimate_pic_address_disp_p): Allow
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* config/i386/i386.c (legitimate_pic_address_disp_p): Allow
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@ -1,5 +1,5 @@
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/* Tail call optimization on trees.
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/* Tail call optimization on trees.
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Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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This file is part of GCC.
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This file is part of GCC.
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@ -400,9 +400,10 @@ find_tail_calls (basic_block bb, struct tailcall **ret)
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{
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{
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stmt = gsi_stmt (gsi);
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stmt = gsi_stmt (gsi);
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/* Ignore labels, returns and debug stmts. */
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/* Ignore labels, returns, clobbers and debug stmts. */
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if (gimple_code (stmt) == GIMPLE_LABEL
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if (gimple_code (stmt) == GIMPLE_LABEL
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|| gimple_code (stmt) == GIMPLE_RETURN
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|| gimple_code (stmt) == GIMPLE_RETURN
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|| gimple_clobber_p (stmt)
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|| is_gimple_debug (stmt))
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|| is_gimple_debug (stmt))
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continue;
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continue;
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@ -523,6 +524,9 @@ find_tail_calls (basic_block bb, struct tailcall **ret)
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if (gimple_code (stmt) == GIMPLE_RETURN)
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if (gimple_code (stmt) == GIMPLE_RETURN)
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break;
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break;
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if (gimple_clobber_p (stmt))
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continue;
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if (is_gimple_debug (stmt))
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if (is_gimple_debug (stmt))
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continue;
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continue;
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