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Diffstat (limited to 'gcc/tree-ssa-forwprop.c')
| -rw-r--r-- | gcc/tree-ssa-forwprop.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c index 047d057..bacd34e 100644 --- a/gcc/tree-ssa-forwprop.c +++ b/gcc/tree-ssa-forwprop.c @@ -952,7 +952,15 @@ tree_ssa_forward_propagate_single_use_vars (void) continue; } - if (TREE_CODE (rhs) == ADDR_EXPR) + if (TREE_CODE (rhs) == ADDR_EXPR + /* We can also disregard changes in CV qualifiers for + the dereferenced value. */ + || ((TREE_CODE (rhs) == NOP_EXPR + || TREE_CODE (rhs) == CONVERT_EXPR) + && TREE_CODE (TREE_OPERAND (rhs, 0)) == ADDR_EXPR + && POINTER_TYPE_P (TREE_TYPE (rhs)) + && useless_type_conversion_p (TREE_TYPE (TREE_TYPE (rhs)), + TREE_TYPE (TREE_TYPE (TREE_OPERAND (rhs, 0)))))) { if (forward_propagate_addr_expr (lhs, rhs)) { |