tree: Fix up TREE_SIDE_EFFECTS on internal calls [PR94809]

On the following testcase, match.pd during GENERIC folding
changes the -1U / x < y into __imag__ .MUL_OVERFLOW (x, y),
but unfortunately unlike for normal calls nothing sets TREE_SIDE_EFFECTS on
the call.  There is the process_call_operands function that non-internal
call creation calls and it is usable for internal calls too,
e.g. TREE_SIDE_EFFECTS is derived from checking whether the
call has side-effects (non-ECF_{CONST,PURE}; we have those for internal
calls) and from whether any of the arguments has TREE_SIDE_EFFECTS.

2020-04-28  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/94809
	* tree.c (build_call_expr_internal_loc_array): Call
	process_call_operands.

	* gcc.c-torture/execute/pr94809.c: New test.

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7d8fb27..d8b753d 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,4 +1,10 @@
-2020-04-27 Anton Youdkevitch <anton.youdkevitch@bell-sw.com>
+2020-04-28  Jakub Jelinek  <jakub@redhat.com>
+
+       PR tree-optimization/94809
+       * tree.c (build_call_expr_internal_loc_array): Call
+       process_call_operands.
+
+2020-04-27  Anton Youdkevitch  <anton.youdkevitch@bell-sw.com>
 
        * config/aarch64/aarch64-cores.def (thunderx3t110): Add the chip name.
        * config/aarch64/aarch64-tune.md: Regenerate.
@@ -7,7 +13,7 @@
        (thunderx3t110_vector_cost): Likewise.
        (thunderx3t110_prefetch_tune): Likewise.
        (thunderx3t110_tunings): Likewise.
-       * gcc/config/aarch64/aarch64-cost-tables.h (thunderx3t110_extra_costs):
+       * config/aarch64/aarch64-cost-tables.h (thunderx3t110_extra_costs):
        Define.
        * config/aarch64/thunderx3t110.md: New file.
        * config/aarch64/aarch64.md: Include thunderx3t110.md.

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 77f56c1..e94c09c 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-04-28  Jakub Jelinek  <jakub@redhat.com>
+
+       PR tree-optimization/94809
+       * gcc.c-torture/execute/pr94809.c: New test.
+
 2020-04-28  Iain Sandoe  <iain@sandoe.co.uk>
 
        PR c++/94760

diff --git a/gcc/testsuite/gcc.c-torture/execute/pr94809.c b/gcc/testsuite/gcc.c-torture/execute/pr94809.c
new file mode 100644 (file)
index 0000000..ce55e8f
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr94809.c
@@ -0,0 +1,12 @@
+/* PR tree-optimization/94809 */
+
+int
+main ()
+{
+  int a = 0;
+  unsigned long long one = 1;
+  ((-1ULL / one) < a++, one);
+  if (a != 1)
+    __builtin_abort ();
+  return 0;
+}

diff --git a/gcc/tree.c b/gcc/tree.c
index da6b8e2..e28b295 100644 (file)
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -11523,6 +11523,7 @@ build_call_expr_internal_loc_array (location_t loc, internal_fn ifn,
     CALL_EXPR_ARG (t, i) = args[i];
   SET_EXPR_LOCATION (t, loc);
   CALL_EXPR_IFN (t) = ifn;
+  process_call_operands (t);
   return t;
 }