diff options
Diffstat (limited to 'contrib/gcc/tree-ssa-pre.c')
| -rw-r--r-- | contrib/gcc/tree-ssa-pre.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/contrib/gcc/tree-ssa-pre.c b/contrib/gcc/tree-ssa-pre.c index 9c7b89f..ba32b3c 100644 --- a/contrib/gcc/tree-ssa-pre.c +++ b/contrib/gcc/tree-ssa-pre.c @@ -1076,6 +1076,7 @@ phi_translate (tree expr, value_set_t set, basic_block pred, tree newexpr; tree vh = get_value_handle (expr); bool listchanged = false; + bool invariantarg = false; VEC (tree, gc) *vuses = VALUE_HANDLE_VUSES (vh); VEC (tree, gc) *tvuses; @@ -1134,10 +1135,26 @@ phi_translate (tree expr, value_set_t set, basic_block pred, if (newval != oldval) { listchanged = true; + invariantarg |= is_gimple_min_invariant (newval); TREE_VALUE (newwalker) = get_value_handle (newval); } } } + + /* In case of new invariant args we might try to fold the call + again. */ + if (invariantarg) + { + tree tmp = fold_ternary (CALL_EXPR, TREE_TYPE (expr), + newop0, newarglist, newop2); + if (tmp) + { + STRIP_TYPE_NOPS (tmp); + if (is_gimple_min_invariant (tmp)) + return tmp; + } + } + if (listchanged) vn_lookup_or_add (newarglist, NULL); |
