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| author | Jakub Jelinek <jakub@redhat.com> | 2011-11-28 21:03:11 +0000 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2011-11-28 21:03:11 +0000 |
| commit | dc6ff64de18db9c63be1dd57036b6d7b372e55d6 (patch) | |
| tree | 32e3db64b2d2968a496e87e98982ff6eb23b7915 /gcc/tree-ssa-forwprop.c | |
| parent | 83d114ff3900571e37143c7a40baa59e55ba1d2e (diff) | |
PR tree-optimization/50078
* tree-ssa-forwprop.c (forward_propagate_addr_expr_1): Copy over
TREE_THIS_VOLATILE also from the old to new lhs resp. rhs.
* gcc.dg/pr50078.c: New test.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@181786 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-forwprop.c')
| -rw-r--r-- | gcc/tree-ssa-forwprop.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c index d707db520e3..6ab47317770 100644 --- a/gcc/tree-ssa-forwprop.c +++ b/gcc/tree-ssa-forwprop.c @@ -910,7 +910,7 @@ forward_propagate_addr_expr_1 (tree name, tree def_rhs, TREE_TYPE (gimple_assign_rhs1 (use_stmt)))) { tree *def_rhs_basep = &TREE_OPERAND (def_rhs, 0); - tree new_offset, new_base, saved; + tree new_offset, new_base, saved, new_lhs; while (handled_component_p (*def_rhs_basep)) def_rhs_basep = &TREE_OPERAND (*def_rhs_basep, 0); saved = *def_rhs_basep; @@ -930,8 +930,9 @@ forward_propagate_addr_expr_1 (tree name, tree def_rhs, new_base, new_offset); TREE_THIS_VOLATILE (*def_rhs_basep) = TREE_THIS_VOLATILE (lhs); TREE_THIS_NOTRAP (*def_rhs_basep) = TREE_THIS_NOTRAP (lhs); - gimple_assign_set_lhs (use_stmt, - unshare_expr (TREE_OPERAND (def_rhs, 0))); + new_lhs = unshare_expr (TREE_OPERAND (def_rhs, 0)); + gimple_assign_set_lhs (use_stmt, new_lhs); + TREE_THIS_VOLATILE (new_lhs) = TREE_THIS_VOLATILE (lhs); *def_rhs_basep = saved; tidy_after_forward_propagate_addr (use_stmt); /* Continue propagating into the RHS if this was not the @@ -991,7 +992,7 @@ forward_propagate_addr_expr_1 (tree name, tree def_rhs, TREE_TYPE (TREE_OPERAND (def_rhs, 0)))) { tree *def_rhs_basep = &TREE_OPERAND (def_rhs, 0); - tree new_offset, new_base, saved; + tree new_offset, new_base, saved, new_rhs; while (handled_component_p (*def_rhs_basep)) def_rhs_basep = &TREE_OPERAND (*def_rhs_basep, 0); saved = *def_rhs_basep; @@ -1011,8 +1012,9 @@ forward_propagate_addr_expr_1 (tree name, tree def_rhs, new_base, new_offset); TREE_THIS_VOLATILE (*def_rhs_basep) = TREE_THIS_VOLATILE (rhs); TREE_THIS_NOTRAP (*def_rhs_basep) = TREE_THIS_NOTRAP (rhs); - gimple_assign_set_rhs1 (use_stmt, - unshare_expr (TREE_OPERAND (def_rhs, 0))); + new_rhs = unshare_expr (TREE_OPERAND (def_rhs, 0)); + gimple_assign_set_rhs1 (use_stmt, new_rhs); + TREE_THIS_VOLATILE (new_rhs) = TREE_THIS_VOLATILE (rhs); *def_rhs_basep = saved; fold_stmt_inplace (use_stmt_gsi); tidy_after_forward_propagate_addr (use_stmt); |