diff options
Diffstat (limited to 'gcc/tree-ssa-copy.c')
| -rw-r--r-- | gcc/tree-ssa-copy.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/gcc/tree-ssa-copy.c b/gcc/tree-ssa-copy.c index 5f4033d3a9b..10b09898dbc 100644 --- a/gcc/tree-ssa-copy.c +++ b/gcc/tree-ssa-copy.c @@ -29,7 +29,6 @@ Boston, MA 02111-1307, USA. */ #include "ggc.h" #include "basic-block.h" #include "output.h" -#include "errors.h" #include "expr.h" #include "function.h" #include "diagnostic.h" @@ -475,24 +474,31 @@ static void dump_copy_of (FILE *dump_file, tree var) { tree val; + sbitmap visited; print_generic_expr (dump_file, var, dump_flags); if (TREE_CODE (var) != SSA_NAME) return; - + + visited = sbitmap_alloc (num_ssa_names); + sbitmap_zero (visited); + SET_BIT (visited, SSA_NAME_VERSION (var)); + fprintf (dump_file, " copy-of chain: "); val = var; print_generic_expr (dump_file, val, 0); fprintf (dump_file, " "); - while (copy_of[SSA_NAME_VERSION (val)].value - && copy_of[SSA_NAME_VERSION (val)].value != val) + while (copy_of[SSA_NAME_VERSION (val)].value) { fprintf (dump_file, "-> "); val = copy_of[SSA_NAME_VERSION (val)].value; print_generic_expr (dump_file, val, 0); fprintf (dump_file, " "); + if (TEST_BIT (visited, SSA_NAME_VERSION (val))) + break; + SET_BIT (visited, SSA_NAME_VERSION (val)); } val = get_copy_of_val (var)->value; @@ -502,6 +508,8 @@ dump_copy_of (FILE *dump_file, tree var) fprintf (dump_file, "[COPY]"); else fprintf (dump_file, "[NOT A COPY]"); + + sbitmap_free (visited); } @@ -887,7 +895,7 @@ fini_copy_prop (void) copy_of[i].value = get_last_copy_of (var); } - substitute_and_fold (copy_of); + substitute_and_fold (copy_of, false); free (cached_last_copy_of); free (copy_of); |