diff options
| author | vries <vries@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-10-18 08:57:39 +0000 |
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| committer | vries <vries@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-10-18 08:57:39 +0000 |
| commit | 4c3030b9f7724b3d623a0dae095116a524c5441f (patch) | |
| tree | 3b1b6394f8dab21f1dae90612735039580316aaf /gcc/tree-ssa-dce.c | |
| parent | 56cf6489fd290abbf972d7a5b0f8fde79d4750de (diff) | |
| download | gcc-4c3030b9f7724b3d623a0dae095116a524c5441f.tar.gz | |
2011-10-18 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/50672
* tree-ssa-dce.c (mark_virtual_operand_for_renaming): New function,
factored out of ...
(mark_virtual_phi_result_for_renaming): Use
mark_virtual_operand_for_renaming.
* tree-flow.h (mark_virtual_operand_for_renaming): Declare.
* tree-ssa-tail-merge.c (release_last_vdef): New function.
(purge_bbs): Add update_vops parameter. Call release_last_vdef for each
deleted basic block.
(tail_merge_optimize): Add argument to call to purge_bbs.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@180126 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-dce.c')
| -rw-r--r-- | gcc/tree-ssa-dce.c | 37 |
1 files changed, 23 insertions, 14 deletions
diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c index b84b6f9a99e..5a6a38e63e9 100644 --- a/gcc/tree-ssa-dce.c +++ b/gcc/tree-ssa-dce.c @@ -982,18 +982,36 @@ propagate_necessity (struct edge_list *el) } } -/* Replace all uses of result of PHI by underlying variable and mark it +/* Replace all uses of NAME by underlying variable and mark it for renaming. */ void -mark_virtual_phi_result_for_renaming (gimple phi) +mark_virtual_operand_for_renaming (tree name) { bool used = false; imm_use_iterator iter; use_operand_p use_p; gimple stmt; - tree result_ssa, result_var; + tree name_var; + + name_var = SSA_NAME_VAR (name); + FOR_EACH_IMM_USE_STMT (stmt, iter, name) + { + FOR_EACH_IMM_USE_ON_STMT (use_p, iter) + SET_USE (use_p, name_var); + update_stmt (stmt); + used = true; + } + if (used) + mark_sym_for_renaming (name_var); +} +/* Replace all uses of result of PHI by underlying variable and mark it + for renaming. */ + +void +mark_virtual_phi_result_for_renaming (gimple phi) +{ if (dump_file && (dump_flags & TDF_DETAILS)) { fprintf (dump_file, "Marking result for renaming : "); @@ -1001,19 +1019,10 @@ mark_virtual_phi_result_for_renaming (gimple phi) fprintf (dump_file, "\n"); } - result_ssa = gimple_phi_result (phi); - result_var = SSA_NAME_VAR (result_ssa); - FOR_EACH_IMM_USE_STMT (stmt, iter, result_ssa) - { - FOR_EACH_IMM_USE_ON_STMT (use_p, iter) - SET_USE (use_p, result_var); - update_stmt (stmt); - used = true; - } - if (used) - mark_sym_for_renaming (result_var); + mark_virtual_operand_for_renaming (gimple_phi_result (phi)); } + /* Remove dead PHI nodes from block BB. */ static bool |