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| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-11-05 19:02:46 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-11-05 19:02:46 +0000 |
| commit | 94deb769dd50c1ba86e1139eea7fc0bd075ed4d6 (patch) | |
| tree | 8df473c5a1f98acadecb2f68d4e7a78d4014022c /gcc/cp/cp-gimplify.c | |
| parent | 84f7af3e396421fb995bb4a848f02e2ef63a1b15 (diff) | |
| download | gcc-94deb769dd50c1ba86e1139eea7fc0bd075ed4d6.tar.gz | |
PR c++/46160
* cp-gimplify.c (cp_gimplify_expr): Drop volatile MEM_REFs
on the RHS to avoid infinite recursion with gimplify_expr.
* g++.dg/opt/empty2.C: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@166372 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/cp/cp-gimplify.c')
| -rw-r--r-- | gcc/cp/cp-gimplify.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/cp/cp-gimplify.c b/gcc/cp/cp-gimplify.c index dd879c63b15..705979d6c55 100644 --- a/gcc/cp/cp-gimplify.c +++ b/gcc/cp/cp-gimplify.c @@ -595,6 +595,16 @@ cp_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p) if (!TREE_SIDE_EFFECTS (op1) || (DECL_P (op1) && TREE_THIS_VOLATILE (op1))) *expr_p = op0; + else if (TREE_CODE (op1) == MEM_REF + && TREE_THIS_VOLATILE (op1)) + { + /* Similarly for volatile MEM_REFs on the RHS. */ + if (!TREE_SIDE_EFFECTS (TREE_OPERAND (op1, 0))) + *expr_p = op0; + else + *expr_p = build2 (COMPOUND_EXPR, TREE_TYPE (*expr_p), + TREE_OPERAND (op1, 0), op0); + } else *expr_p = build2 (COMPOUND_EXPR, TREE_TYPE (*expr_p), op0, op1); |