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| author | Marek Polacek <polacek@redhat.com> | 2015-09-30 09:24:02 +0000 |
|---|---|---|
| committer | Marek Polacek <mpolacek@gcc.gnu.org> | 2015-09-30 09:24:02 +0000 |
| commit | 6ea2f74cf9dbee7a3e41d4c2bd3757a2ea303b8e (patch) | |
| tree | d3500a983497c0bd0167a8f97529626c0c3a2ed2 /gcc/tree-ssanames.c | |
| parent | ae15100c9197195f26541c199aa4f6c75d36eb13 (diff) | |
| download | gcc-6ea2f74cf9dbee7a3e41d4c2bd3757a2ea303b8e.zip gcc-6ea2f74cf9dbee7a3e41d4c2bd3757a2ea303b8e.tar.gz gcc-6ea2f74cf9dbee7a3e41d4c2bd3757a2ea303b8e.tar.bz2 | |
re PR tree-optimization/67690 (wrong code with -O2 on x86_64/Linux)
PR tree-optimization/67690
* tree-ssa-ifcombine.c (pass_tree_ifcombine::execute): Call
reset_flow_sensitive_info_in_bb.
* tree-ssa-tail-merge.c (replace_block_by): Likewise.
* tree-ssanames.c: Include "gimple-iterator.h".
(reset_flow_sensitive_info_in_bb): New function.
* tree-ssanames.h (reset_flow_sensitive_info_in_bb): Declare.
* gcc.dg/torture/pr67690.c: New test.
From-SVN: r228284
Diffstat (limited to 'gcc/tree-ssanames.c')
| -rw-r--r-- | gcc/tree-ssanames.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/tree-ssanames.c b/gcc/tree-ssanames.c index 4199290..7235dc3 100644 --- a/gcc/tree-ssanames.c +++ b/gcc/tree-ssanames.c @@ -23,6 +23,7 @@ along with GCC; see the file COPYING3. If not see #include "backend.h" #include "tree.h" #include "gimple.h" +#include "gimple-iterator.h" #include "hard-reg-set.h" #include "ssa.h" #include "alias.h" @@ -544,6 +545,29 @@ reset_flow_sensitive_info (tree name) SSA_NAME_RANGE_INFO (name) = NULL; } +/* Clear all flow sensitive data from all statements and PHI definitions + in BB. */ + +void +reset_flow_sensitive_info_in_bb (basic_block bb) +{ + for (gimple_stmt_iterator gsi = gsi_start_bb (bb); !gsi_end_p (gsi); + gsi_next (&gsi)) + { + gimple *stmt = gsi_stmt (gsi); + ssa_op_iter i; + tree op; + FOR_EACH_SSA_TREE_OPERAND (op, stmt, i, SSA_OP_DEF) + reset_flow_sensitive_info (op); + } + + for (gphi_iterator gsi = gsi_start_phis (bb); !gsi_end_p (gsi); + gsi_next (&gsi)) + { + tree phi_def = gimple_phi_result (gsi.phi ()); + reset_flow_sensitive_info (phi_def); + } +} /* Release all the SSA_NAMEs created by STMT. */ |