From c11b02311a08b854236e9798abbcb8ad5ee64801 Mon Sep 17 00:00:00 2001 From: Richard Guenther Date: Wed, 27 Jul 2005 11:15:32 +0000 Subject: [PATCH] tree-ssa-structalias.c (push_fields_onto_fieldstack): Avoid pushing again if current struct contains only fields we decomposed. 2005-07-27 Richard Guenther * tree-ssa-structalias.c (push_fields_onto_fieldstack): Avoid pushing again if current struct contains only fields we decomposed. * gcc.dg/tree-ssa/salias-1.c: New testcase. From-SVN: r102424 --- gcc/ChangeLog | 6 ++++++ gcc/testsuite/ChangeLog | 4 ++++ gcc/testsuite/gcc.dg/tree-ssa/salias-1.c | 19 +++++++++++++++++++ gcc/tree-ssa-structalias.c | 5 ++++- 4 files changed, 33 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/salias-1.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d975412f234..a300071a914 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2005-07-27 Richard Guenther + + * tree-ssa-structalias.c (push_fields_onto_fieldstack): + Avoid pushing again if current struct contains only + fields we decomposed. + 2005-07-27 Jan Hubicka PR tree-optimization/22574 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 14426f66ac4..60889ca7a6f 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2005-07-27 Richard Guenther + + * gcc.dg/tree-ssa/salias-1.c: New testcase. + 2005-07-27 Volker Reichelt PR fortran/22503 diff --git a/gcc/testsuite/gcc.dg/tree-ssa/salias-1.c b/gcc/testsuite/gcc.dg/tree-ssa/salias-1.c new file mode 100644 index 00000000000..9933cc8ca31 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/salias-1.c @@ -0,0 +1,19 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-salias" } */ + +struct { + struct { + struct { + int i, j; + } c; + } b; +} a; + +int foo(void) +{ + a.b.c.i = 0; + return a.b.c.j; +} + +/* { dg-final { scan-tree-dump-times "SFT" 2 "salias" } } */ +/* { dg-final { cleanup-tree-dump "salias" } } */ diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c index 76ce7ab83c0..b01e9e70550 100644 --- a/gcc/tree-ssa-structalias.c +++ b/gcc/tree-ssa-structalias.c @@ -2972,6 +2972,7 @@ push_fields_onto_fieldstack (tree type, VEC(fieldoff_s,heap) **fieldstack, if (TREE_CODE (field) == FIELD_DECL) { bool push = false; + int pushed = 0; if (has_union && (TREE_CODE (TREE_TYPE (field)) == QUAL_UNION_TYPE @@ -2980,7 +2981,7 @@ push_fields_onto_fieldstack (tree type, VEC(fieldoff_s,heap) **fieldstack, if (!var_can_have_subvars (field)) push = true; - else if (!(push_fields_onto_fieldstack + else if (!(pushed = push_fields_onto_fieldstack (TREE_TYPE (field), fieldstack, offset + bitpos_of_field (field), has_union)) && DECL_SIZE (field) @@ -2999,6 +3000,8 @@ push_fields_onto_fieldstack (tree type, VEC(fieldoff_s,heap) **fieldstack, pair->offset = offset + bitpos_of_field (field); count++; } + else + count += pushed; } return count; -- 2.30.2