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author | Lorry Tar Creator <lorry-tar-importer@baserock.org> | 2013-04-11 09:13:11 +0000 |
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committer | <> | 2014-04-23 12:05:38 +0000 |
commit | 6af3fdec2262dd94954acc5e426ef71cbd4521d3 (patch) | |
tree | 9be02de9a80f7935892a2d03741adee44723e65d /gcc/tree-tailcall.c | |
parent | 19be2b4342ac32e9edc78ce6fed8f61b63ae98d1 (diff) | |
download | gcc-tarball-6af3fdec2262dd94954acc5e426ef71cbd4521d3.tar.gz |
Imported from /home/lorry/working-area/delta_gcc-tarball/gcc-4.7.3.tar.bz2.gcc-4.7.3
Diffstat (limited to 'gcc/tree-tailcall.c')
-rw-r--r-- | gcc/tree-tailcall.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/gcc/tree-tailcall.c b/gcc/tree-tailcall.c index e50ecc2aa9..66fb89252c 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 + Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. This file is part of GCC. @@ -35,6 +35,7 @@ along with GCC; see the file COPYING3. If not see #include "langhooks.h" #include "dbgcnt.h" #include "target.h" +#include "common/common-target.h" /* The file implements the tail recursion elimination. It is also used to analyze the tail calls in general, passing the results to the rtl level @@ -152,7 +153,7 @@ suitable_for_tail_call_opt_p (void) /* If we are using sjlj exceptions, we may need to add a call to _Unwind_SjLj_Unregister at exit of the function. Which means that we cannot do any sibcall transformations. */ - if (targetm.except_unwind_info (&global_options) == UI_SJLJ + if (targetm_common.except_unwind_info (&global_options) == UI_SJLJ && current_function_has_exception_handlers ()) return false; @@ -399,8 +400,11 @@ find_tail_calls (basic_block bb, struct tailcall **ret) { stmt = gsi_stmt (gsi); - /* Ignore labels. */ - if (gimple_code (stmt) == GIMPLE_LABEL || is_gimple_debug (stmt)) + /* 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; /* Check for a call. */ @@ -520,6 +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; @@ -594,8 +601,8 @@ add_successor_phi_arg (edge e, tree var, tree phi_arg) } /* Creates a GIMPLE statement which computes the operation specified by - CODE, OP0 and OP1 to a new variable with name LABEL and inserts the - statement in the position specified by GSI and UPDATE. Returns the + CODE, ACC and OP1 to a new variable with name LABEL and inserts the + statement in the position specified by GSI. Returns the tree node of the statement's result. */ static tree @@ -620,7 +627,7 @@ adjust_return_value_with_ops (enum tree_code code, const char *label, fold_convert (TREE_TYPE (op1), acc), op1)); rhs = force_gimple_operand_gsi (&gsi, rhs, - false, NULL, true, GSI_CONTINUE_LINKING); + false, NULL, true, GSI_SAME_STMT); stmt = gimple_build_assign (NULL_TREE, rhs); } @@ -1090,7 +1097,7 @@ struct gimple_opt_pass pass_tail_recursion = 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ - TODO_dump_func | TODO_verify_ssa /* todo_flags_finish */ + TODO_verify_ssa /* todo_flags_finish */ } }; @@ -1109,6 +1116,6 @@ struct gimple_opt_pass pass_tail_calls = 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ - TODO_dump_func | TODO_verify_ssa /* todo_flags_finish */ + TODO_verify_ssa /* todo_flags_finish */ } }; |