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authorRichard Biener <rguenther@suse.de>2019-07-23 10:00:24 +0000
committerRichard Biener <rguenth@gcc.gnu.org>2019-07-23 10:00:24 +0000
commit62e3e66f130fc280eac0bbb6b69e9adca328c03b (patch)
tree83ec6d9b0fd5b3a0800a0d673c2e9204136fe1ff /gcc/testsuite
parente1eb82f5aa4f6e9ed9a6a368b54d0eda785be85c (diff)
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re PR tree-optimization/83518 (Missing optimization: useless instructions should be dropped)
2019-07-23 Richard Biener <rguenther@suse.de> PR tree-optimization/83518 * tree-ssa-sccvn.c (vn_reference_lookup_3): Handle aggregate init from a constant even when partial defs are already recorded. c/ * gimple-parser.c (c_parser_parse_gimple_body): When we have a CFG also rebuild cgraph edges. * gcc.dg/tree-ssa/ssa-fre-79.c: New testcase. From-SVN: r273732
Diffstat (limited to 'gcc/testsuite')
-rw-r--r--gcc/testsuite/ChangeLog5
-rw-r--r--gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-79.c29
2 files changed, 34 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d5efd50..8e6b026 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-07-23 Richard Biener <rguenther@suse.de>
+
+ PR tree-optimization/83518
+ * gcc.dg/tree-ssa/ssa-fre-79.c: New testcase.
+
2019-07-23 Ed Schonberg <schonberg@adacore.com>
* gnat.dg/task4.adb: New testcase.
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-79.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-79.c
new file mode 100644
index 0000000..83aef9a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-79.c
@@ -0,0 +1,29 @@
+/* { dg-do run } */
+/* { dg-options "-O -fgimple -fdump-tree-fre1" } */
+
+struct S { char a[4]; };
+const struct S cs = { 1, 2, 3, 4 };
+
+int __GIMPLE(ssa,startwith("fre"))
+main ()
+{
+ struct S s;
+ short _1;
+
+ __BB(2):
+ s = cs;
+ s.a[1] = _Literal (char) 3;
+ _1 = __MEM <short, 1> (&s + 1);
+ if (_1 != _Literal (short) 0x303)
+ goto __BB3;
+ else
+ goto __BB4;
+
+ __BB(3):
+ __builtin_abort ();
+
+ __BB(4):
+ return 0;
+}
+
+/* { dg-final { scan-tree-dump-not "abort" "fre1" } } */