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-rw-r--r--toolchain/gcc/4.7.0/200-gcc-pr52734.patch115
1 files changed, 0 insertions, 115 deletions
diff --git a/toolchain/gcc/4.7.0/200-gcc-pr52734.patch b/toolchain/gcc/4.7.0/200-gcc-pr52734.patch
deleted file mode 100644
index a1ac601..0000000
--- a/toolchain/gcc/4.7.0/200-gcc-pr52734.patch
+++ /dev/null
@@ -1,115 +0,0 @@
-Index: gcc/tree-ssa-tail-merge.c
-===================================================================
---- a/gcc/tree-ssa-tail-merge.c (revision 185028)
-+++ b/gcc/tree-ssa-tail-merge.c (working copy)
-@@ -1123,18 +1123,31 @@ gimple_equal_p (same_succ same_succ, gim
- }
- }
-
--/* Let GSI skip backwards over local defs. */
-+/* Let GSI skip backwards over local defs. Return the earliest vuse in VUSE.
-+ Return true in VUSE_ESCAPED if the vuse influenced a SSA_OP_DEF of one of the
-+ processed statements. */
-
- static void
--gsi_advance_bw_nondebug_nonlocal (gimple_stmt_iterator *gsi)
-+gsi_advance_bw_nondebug_nonlocal (gimple_stmt_iterator *gsi, tree *vuse,
-+ bool *vuse_escaped)
- {
- gimple stmt;
-+ tree lvuse;
-
- while (true)
- {
- if (gsi_end_p (*gsi))
- return;
- stmt = gsi_stmt (*gsi);
-+
-+ lvuse = gimple_vuse (stmt);
-+ if (lvuse != NULL_TREE)
-+ {
-+ *vuse = lvuse;
-+ if (!ZERO_SSA_OPERANDS (stmt, SSA_OP_DEF))
-+ *vuse_escaped = true;
-+ }
-+
- if (!(is_gimple_assign (stmt) && local_def (gimple_get_lhs (stmt))
- && !gimple_has_side_effects (stmt)))
- return;
-@@ -1150,9 +1163,11 @@ find_duplicate (same_succ same_succ, bas
- {
- gimple_stmt_iterator gsi1 = gsi_last_nondebug_bb (bb1);
- gimple_stmt_iterator gsi2 = gsi_last_nondebug_bb (bb2);
-+ tree vuse1 = NULL_TREE, vuse2 = NULL_TREE;
-+ bool vuse_escaped = false;
-
-- gsi_advance_bw_nondebug_nonlocal (&gsi1);
-- gsi_advance_bw_nondebug_nonlocal (&gsi2);
-+ gsi_advance_bw_nondebug_nonlocal (&gsi1, &vuse1, &vuse_escaped);
-+ gsi_advance_bw_nondebug_nonlocal (&gsi2, &vuse2, &vuse_escaped);
-
- while (!gsi_end_p (gsi1) && !gsi_end_p (gsi2))
- {
-@@ -1161,13 +1176,20 @@ find_duplicate (same_succ same_succ, bas
-
- gsi_prev_nondebug (&gsi1);
- gsi_prev_nondebug (&gsi2);
-- gsi_advance_bw_nondebug_nonlocal (&gsi1);
-- gsi_advance_bw_nondebug_nonlocal (&gsi2);
-+ gsi_advance_bw_nondebug_nonlocal (&gsi1, &vuse1, &vuse_escaped);
-+ gsi_advance_bw_nondebug_nonlocal (&gsi2, &vuse2, &vuse_escaped);
- }
-
- if (!(gsi_end_p (gsi1) && gsi_end_p (gsi2)))
- return;
-
-+ /* If the incoming vuses are not the same, and the vuse escaped into an
-+ SSA_OP_DEF, then merging the 2 blocks will change the value of the def,
-+ which potentially means the semantics of one of the blocks will be changed.
-+ TODO: make this check more precise. */
-+ if (vuse_escaped && vuse1 != vuse2)
-+ return;
-+
- if (dump_file)
- fprintf (dump_file, "find_duplicates: <bb %d> duplicate of <bb %d>\n",
- bb1->index, bb2->index);
-Index: gcc/testsuite/gcc.dg/pr52734.c
-===================================================================
---- a/dev/null (new file)
-+++ b/gcc/testsuite/gcc.dg/pr52734.c (revision 0)
-@@ -0,0 +1,35 @@
-+/* { dg-do run } */
-+/* { dg-options "-O2" } */
-+
-+int bbb = 0;
-+
-+int __attribute__((noinline,noclone)) aaa(void)
-+{
-+ ++bbb;
-+ return 0;
-+}
-+
-+int __attribute__((noinline,noclone)) ccc(void)
-+{
-+ int ddd;
-+ /* bbb == 0 */
-+ if (aaa())
-+ return bbb;
-+
-+ /* bbb == 1 */
-+ ddd = bbb;
-+ /* bbb == ddd == 1 */
-+ if (aaa ())
-+ return 0;
-+ /* bbb == 2, ddd == 1 */
-+
-+ return ddd;
-+}
-+
-+int main(void)
-+{
-+ if (ccc() != 1)
-+ __builtin_abort();
-+ return 0;
-+}
-+