[gcc r15-785] [prange] Use type agnostic range in phiopt [PR115191]

[Aldy Hernandez via Gcc-cvs]

https://gcc.gnu.org/g:35a293a6454ac0cd88735036f536d8f4ec65951a

commit r15-785-g35a293a6454ac0cd88735036f536d8f4ec65951a
Author: Aldy Hernandez <al...@redhat.com>
Date:   Wed May 22 22:32:57 2024 +0200

    [prange] Use type agnostic range in phiopt [PR115191]
    
    Fix a use of int_range_max in phiopt that should be a type agnostic
    range, because it could be either a pointer or an int.
    
            PR tree-optimization/115191
    
    gcc/ChangeLog:
    
            * tree-ssa-phiopt.cc (value_replacement): Use Value_Range instead
            of int_range_max.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.dg/tree-ssa/pr115191.c: New test.

Diff:
---
 gcc/testsuite/gcc.dg/tree-ssa/pr115191.c | 10 ++++++++++
 gcc/tree-ssa-phiopt.cc                   |  5 ++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr115191.c 
b/gcc/testsuite/gcc.dg/tree-ssa/pr115191.c
new file mode 100644
index 00000000000..43f780aa3b8
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr115191.c
@@ -0,0 +1,10 @@
+// { dg-do compile }
+// { dg-options "-O1 -w" }
+
+typedef void *SCM;
+void set_socket_io_ports();
+void STk_socket_accept(SCM line_buffered) {
+  if (!line_buffered)
+    line_buffered = (SCM)3;
+  set_socket_io_ports(line_buffered != 1);
+}
diff --git a/gcc/tree-ssa-phiopt.cc b/gcc/tree-ssa-phiopt.cc
index 918cf50b589..65f63eb0652 100644
--- a/gcc/tree-ssa-phiopt.cc
+++ b/gcc/tree-ssa-phiopt.cc
@@ -1326,12 +1326,11 @@ value_replacement (basic_block cond_bb, basic_block 
middle_bb,
                    {
                      /* After the optimization PHI result can have value
                         which it couldn't have previously.  */
-                     int_range_max r;
+                     Value_Range r (TREE_TYPE (phires));
                      if (get_global_range_query ()->range_of_expr (r, phires,
                                                                    phi))
                        {
-                         wide_int warg = wi::to_wide (carg);
-                         int_range<2> tmp (TREE_TYPE (carg), warg, warg);
+                         Value_Range tmp (carg, carg);
                          r.union_ (tmp);
                          reset_flow_sensitive_info (phires);
                          set_range_info (phires, r);