From: Andrew MacLeod <amacleod@redhat.com>
Date: Fri, 25 Jun 2021 19:31:39 +0000 (-0400)
Subject: Allow PHIs to pick up global values.
X-Git-Tag: basepoints/gcc-13~6398
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=604dce2d74d3417970e23e7ad38322d1adbca2e2;p=thirdparty%2Fgcc.git

Allow PHIs to pick up global values.

We can also apply known global values to PHI nodes in EVRP.

	* value-query.cc (gimple_range_global): Allow phis.
---

diff --git a/gcc/value-query.cc b/gcc/value-query.cc
index 17dfdb1ccbe9..730a21492753 100644
--- a/gcc/value-query.cc
+++ b/gcc/value-query.cc
@@ -419,7 +419,8 @@ gimple_range_global (tree name)
   gcc_checking_assert (gimple_range_ssa_p (name));
   tree type = TREE_TYPE (name);
 
-  if (SSA_NAME_IS_DEFAULT_DEF (name) || (cfun && cfun->after_inlining))
+  if (SSA_NAME_IS_DEFAULT_DEF (name) || (cfun && cfun->after_inlining)
+      || is_a<gphi *> (SSA_NAME_DEF_STMT (name)))
     {
       value_range vr;
       get_range_global (vr, name);