[PATCH 18/19] ipa: Create a callback edge when encountering an internal .ASSUME call

[Josef Melcr]

This patch adds logic which creates an internal callback edge when it
encounters an IFN_ASSUME internal call.  It acts as a trigger for most
of the patches in this series.  ipa_compute_jump_functions_for_edge has
to be called separately for the new edge, as all jump functions would
have been computed at this point in the code.

        PR ipa/109112
        PR tree-optimization/109045

gcc/ChangeLog:

        * ipa-prop.cc (ipa_analyze_call_uses): Create an internal
        callback edge when dealing with a .ASSUME internal call.

Signed-off-by: Josef Melcr <josef.me...@suse.com>
---
 gcc/ipa-prop.cc | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/gcc/ipa-prop.cc b/gcc/ipa-prop.cc
index bc31e8e3399..0f7d9fdad0e 100644
--- a/gcc/ipa-prop.cc
+++ b/gcc/ipa-prop.cc
@@ -3213,6 +3213,19 @@ ipa_analyze_call_uses (struct ipa_func_body_info *fbi, 
gcall *call)
 {
   tree target = gimple_call_fn (call);
 
+  /* Internal .ASSUME call.  Create a callback edge to its body, calculate its
+     jump functions and return.  This is done here as the main creation route 
in
+     ipa_compute_jump_functions_for_edge doesn't analyze call statements.  */
+  if (callback_ifn_assume_call_p (call))
+    {
+      tree callee_decl = TREE_OPERAND (gimple_call_arg (call, 0), 0);
+      cgraph_node *target = cgraph_node::get_create (callee_decl);
+      cgraph_edge *cbei
+       = cgraph_edge::make_callback_internal (fbi->node, target, call);
+      ipa_compute_jump_functions_for_edge (fbi, cbei);
+      return;
+    }
+
   if (!target
       || (TREE_CODE (target) != SSA_NAME
           && !virtual_method_call_p (target)))
-- 
2.55.0