+2010-05-08 Richard Guenther <rguenther@suse.de>
+
+ PR tree-optimization/44030
+ * tree-ssa-pre.c (eliminate): Copy NECESSARY flag. Set
+ NECESSARY flag if we propagate from a inserted expression.
+
2010-05-08 Eric Botcazou <ebotcazou@adacore.com>
* gimple.c (gimple_types_compatible_p) <ARRAY_TYPE>: Treat bounds of
+2010-05-08 Richard Guenther <rguenther@suse.de>
+
+ PR tree-optimization/44030
+ * gcc.c-torture/compile/pr44030.c: New testcase.
+
2010-05-08 Eric Botcazou <ebotcazou@adacore.com>
* gnat.dg/lto6.adb: New test.
--- /dev/null
+typedef int int32_t;
+typedef unsigned int uint32_t;
+static uint32_t
+safe_sub_func_uint32_t_u_u (uint32_t ui1, uint32_t ui2)
+{
+ return ui1 - ui2;
+}
+
+int32_t l_105[7];
+
+int32_t g_4;
+int32_t *g_54 = &g_4;
+int32_t *
+func (int32_t p_73, int32_t * p_74, int32_t p_75, int32_t * *p_76,
+ int32_t * *p_77)
+{
+lbl_110:for (g_4 = 0; g_4; g_4 = 1)
+ {
+ }
+ for (p_75 = -28; p_75; p_75 = safe_sub_func_uint32_t_u_u (p_75, 1))
+ {
+ if (g_4)
+ goto lbl_110;
+ *g_54 = 0;
+ }
+ return &l_105[5];
+}
+
sprime = fold_convert (TREE_TYPE (res), sprime);
stmt = gimple_build_assign (res, sprime);
SSA_NAME_DEF_STMT (res) = stmt;
+ gimple_set_plf (stmt, NECESSARY, gimple_plf (phi, NECESSARY));
gsi2 = gsi_after_labels (b);
gsi_insert_before (&gsi2, stmt, GSI_NEW_STMT);
&& single_imm_use (lhs, &use_p, &use_stmt)
&& may_propagate_copy (USE_FROM_PTR (use_p), rhs))
{
- SET_USE (use_p, gimple_assign_rhs1 (stmt));
+ SET_USE (use_p, rhs);
update_stmt (use_stmt);
+ if (bitmap_bit_p (inserted_exprs, SSA_NAME_VERSION (lhs))
+ && TREE_CODE (rhs) == SSA_NAME)
+ gimple_set_plf (SSA_NAME_DEF_STMT (rhs), NECESSARY, true);
}
/* If this is a store or a now unused copy, remove it. */