diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/sra-9.c | 20 | ||||
| -rw-r--r-- | gcc/tree-sra.c | 51 |
4 files changed, 73 insertions, 9 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ff7b057..f82bc7a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2010-04-13 Martin Jambor <mjambor@suse.cz> + + * tree-sra.c (replace_uses_with_default_def_ssa_name): New function. + (sra_modify_assign): Delete stmts loading dead data even if racc has no + children. Call replace_uses_with_default_def_ssa_name to handle + SSA_NAES on lhs. + 2010-04-13 Michael Matz <matz@suse.de> PR middle-end/43730 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 5d187a1..dfd16d4 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2010-04-13 Martin Jambor <mjambor@suse.cz> + + * gcc.dg/tree-ssa/sra-9.c: New test. + 2010-04-13 Michael Matz <matz@suse.de> PR middle-end/43730 diff --git a/gcc/testsuite/gcc.dg/tree-ssa/sra-9.c b/gcc/testsuite/gcc.dg/tree-ssa/sra-9.c new file mode 100644 index 0000000..7a810c6 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/sra-9.c @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-optimized" } */ + +struct S +{ + int a, b, c; + int z[20]; +}; + +int foo (int d) +{ + struct S s; + + s.a = d; + return s.a + s.b; +} + +/* There should be no reference to s.b. */ +/* { dg-final { scan-tree-dump-times "s\.b" 0 "optimized"} } */ +/* { dg-final { cleanup-tree-dump "optimized" } } */ diff --git a/gcc/tree-sra.c b/gcc/tree-sra.c index 5653168..0a9b3df 100644 --- a/gcc/tree-sra.c +++ b/gcc/tree-sra.c @@ -2528,6 +2528,37 @@ sra_modify_constructor_assign (gimple *stmt, gimple_stmt_iterator *gsi) } } +/* Create a new suitable default definition SSA_NAME and replace all uses of + SSA with it. */ + +static void +replace_uses_with_default_def_ssa_name (tree ssa) +{ + tree repl, decl = SSA_NAME_VAR (ssa); + if (TREE_CODE (decl) == PARM_DECL) + { + tree tmp = create_tmp_var (TREE_TYPE (decl), "SR"); + if (TREE_CODE (TREE_TYPE (tmp)) == COMPLEX_TYPE + || TREE_CODE (TREE_TYPE (tmp)) == VECTOR_TYPE) + DECL_GIMPLE_REG_P (tmp) = 1; + + get_var_ann (tmp); + add_referenced_var (tmp); + repl = make_ssa_name (tmp, gimple_build_nop ()); + set_default_def (tmp, repl); + } + else + { + repl = gimple_default_def (cfun, decl); + if (!repl) + { + repl = make_ssa_name (decl, gimple_build_nop ()); + set_default_def (decl, repl); + } + } + + replace_uses_by (ssa, repl); +} /* Callback of scan_function to process assign statements. It examines both sides of the statement, replaces them with a scalare replacement if there is @@ -2703,26 +2734,28 @@ sra_modify_assign (gimple *stmt, gimple_stmt_iterator *gsi, } else { - if (access_has_children_p (racc)) + if (racc) { - if (!racc->grp_unscalarized_data - /* Do not remove SSA name definitions (PR 42704). */ - && TREE_CODE (lhs) != SSA_NAME) + if (!racc->grp_to_be_replaced && !racc->grp_unscalarized_data) { - generate_subtree_copies (racc->first_child, lhs, - racc->offset, 0, 0, gsi, - false, false); + if (racc->first_child) + generate_subtree_copies (racc->first_child, lhs, + racc->offset, 0, 0, gsi, + false, false); gcc_assert (*stmt == gsi_stmt (*gsi)); + if (TREE_CODE (lhs) == SSA_NAME) + replace_uses_with_default_def_ssa_name (lhs); + unlink_stmt_vdef (*stmt); gsi_remove (gsi, true); sra_stats.deleted++; return SRA_SA_REMOVED; } - else + else if (racc->first_child) generate_subtree_copies (racc->first_child, lhs, racc->offset, 0, 0, gsi, false, true); } - else if (access_has_children_p (lacc)) + if (access_has_children_p (lacc)) generate_subtree_copies (lacc->first_child, rhs, lacc->offset, 0, 0, gsi, true, true); } |