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| author | Jakub Jelinek <jakub@redhat.com> | 2011-08-23 17:53:18 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2011-08-23 17:53:18 +0200 |
| commit | 09e640b34df2fd4f0413f6984194606e97191292 (patch) | |
| tree | 7fbdac5f555fe09d1f934920f03823bfd1fdcfbb /gcc/cp | |
| parent | e2f008377225f76538d728cb16772e29091feb0f (diff) | |
| download | gcc-09e640b34df2fd4f0413f6984194606e97191292.zip gcc-09e640b34df2fd4f0413f6984194606e97191292.tar.gz gcc-09e640b34df2fd4f0413f6984194606e97191292.tar.bz2 | |
re PR c++/50158 (invalid 'variable set but not used' warning (boolean used as an index to an array))
PR c++/50158
* typeck.c (cp_build_modify_expr): Call mark_rvalue_use on rhs
if it has side-effects and needs to be preevaluated.
* g++.dg/warn/Wunused-var-16.C: New test.
From-SVN: r177992
Diffstat (limited to 'gcc/cp')
| -rw-r--r-- | gcc/cp/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/cp/typeck.c | 2 |
2 files changed, 8 insertions, 0 deletions
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog index 5ebab87..39f1d31 100644 --- a/gcc/cp/ChangeLog +++ b/gcc/cp/ChangeLog @@ -1,3 +1,9 @@ +2011-08-23 Jakub Jelinek <jakub@redhat.com> + + PR c++/50158 + * typeck.c (cp_build_modify_expr): Call mark_rvalue_use on rhs + if it has side-effects and needs to be preevaluated. + 2011-08-23 Siddhesh Poyarekar <siddhesh.poyarekar@gmail.com> PR c++/50055 diff --git a/gcc/cp/typeck.c b/gcc/cp/typeck.c index a1f6761..4c130ee 100644 --- a/gcc/cp/typeck.c +++ b/gcc/cp/typeck.c @@ -6692,6 +6692,8 @@ cp_build_modify_expr (tree lhs, enum tree_code modifycode, tree rhs, side effect associated with any single compound assignment operator. -- end note ] */ lhs = stabilize_reference (lhs); + if (TREE_SIDE_EFFECTS (rhs)) + rhs = mark_rvalue_use (rhs); rhs = stabilize_expr (rhs, &init); newrhs = cp_build_binary_op (input_location, modifycode, lhs, rhs, |