new file mode 100644
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-pre-stats" } */
+
+int f();
+int d;
+void c()
+{
+ for (;;)
+ {
+ f();
+ int (*fp)() __attribute__((const)) = (void *)f;
+ d = fp();
+ }
+}
+
+/* We shouldn't ICE and hoist the const call of fp out of the loop. */
+/* { dg-final { scan-tree-dump "Eliminated: 1" "pre" } } */
@@ -2792,9 +2792,10 @@ create_expression_by_pieces (basic_block block, pre_expr expr,
args.quick_push (arg);
}
gcall *call = gimple_build_call_vec (fn, args);
+ gimple_call_set_fntype (call, currop->type);
if (sc)
gimple_call_set_chain (call, sc);
- tree forcedname = make_ssa_name (currop->type);
+ tree forcedname = make_ssa_name (TREE_TYPE (currop->type));
gimple_call_set_lhs (call, forcedname);
/* There's no CCP pass after PRE which would re-compute alignment
information so make sure we re-materialize this here. */
@@ -1206,7 +1206,7 @@ copy_reference_ops_from_call (gcall *call,
/* Copy the type, opcode, function, static chain and EH region, if any. */
memset (&temp, 0, sizeof (temp));
- temp.type = gimple_call_return_type (call);
+ temp.type = gimple_call_fntype (call);
temp.opcode = CALL_EXPR;
temp.op0 = gimple_call_fn (call);
temp.op1 = gimple_call_chain (call);
The following fixes PR88087 - a failure for PRE to re-materialize call fntypes. Bootstrapped and tested on x86_64-unknown-linux-gnu, applied. Richard. 2018-11-20 Richard Biener <rguenther@suse.de> PR tree-optimization/88087 * tree-ssa-pre.c (create_expression_by_pieces): Re-materialize call fntype. * tree-ssa-sccvn.c (copy_reference_ops_from_call): Remember call fntype. * gcc.dg/tree-ssa/pr88087.c: New testcase. From 2c92b2c67a1464671c795e2c524b492ca0dce1a0 Mon Sep 17 00:00:00 2001 From: Richard Guenther <rguenther@suse.de> Date: Mon, 19 Nov 2018 13:19:21 +0100 Subject: [PATCH] fix-pr88087