From: Iain Buclaw <ibuclaw@gdcproject.org>
Date: Sun, 1 Nov 2020 15:39:10 +0000 (+0100)
Subject: ipa: Fix segmentation fault in function_summary<clone_info*>::get(cgraph_node*)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=895fdc1f4c9ff1dfb18b80af838aa353363edb40;p=gcc.git

ipa: Fix segmentation fault in function_summary<clone_info*>::get(cgraph_node*)

PR 97660 occurs when cgraph_node::get returns NULL, and this NULL
cgraph_node is then passed to clone_info::get.  As the original assert
prior to the regressing change in r11-4587 allowed for the cgraph_node
to be NULL, clone_info::get is now only called when cgraph_node::get
returns a nonnull value.

gcc/ChangeLog:

	PR ipa/97660
	* cgraph.c (cgraph_edge::redirect_call_stmt_to_callee): Don't call
	clone_info::get when cgraph_node::get returns NULL.
---

diff --git a/gcc/cgraph.c b/gcc/cgraph.c
index 9f3a7284310..36bdb009bf8 100644
--- a/gcc/cgraph.c
+++ b/gcc/cgraph.c
@@ -1491,9 +1491,11 @@ cgraph_edge::redirect_call_stmt_to_callee (cgraph_edge *e)
     }
   if (flag_checking && decl)
     {
-      cgraph_node *node = cgraph_node::get (decl);
-      clone_info *info = clone_info::get (node);
-      gcc_assert (!node || !info || !info->param_adjustments);
+      if (cgraph_node *node = cgraph_node::get (decl))
+	{
+	  clone_info *info = clone_info::get (node);
+	  gcc_assert (!info || !info->param_adjustments);
+	}
     }
 
   clone_info *callee_info = clone_info::get (e->callee);