[gcc r15-2165] Check for SSA_NAME not in the IL yet.

[Andrew Macleod via Gcc-cvs]

https://gcc.gnu.org/g:01c095ab77f8f43bf77e4c0be6c4f4c0d15a4c29

commit r15-2165-g01c095ab77f8f43bf77e4c0be6c4f4c0d15a4c29
Author: Andrew MacLeod <amacl...@redhat.com>
Date:   Fri Jul 19 17:39:40 2024 -0400

    Check for SSA_NAME not in the IL yet.
    
    Check for an SSA_NAME not in the CFG before trying to create an
    equivalence record in the defintion block.
    
            PR tree-optimization/116003
            gcc/
            * value-relation.cc (equiv_oracle::register_initial_def): Check
            if SSA_NAME is in the IL before registering.
    
            gcc/testsuite/
            * gcc.dg/pr116003.c: New.

Diff:
---
 gcc/testsuite/gcc.dg/pr116003.c | 21 +++++++++++++++++++++
 gcc/value-relation.cc           |  6 +++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/pr116003.c b/gcc/testsuite/gcc.dg/pr116003.c
new file mode 100644
index 000000000000..6021058a14ee
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr116003.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fnon-call-exceptions -fprofile-arcs 
-finstrument-functions -fno-tree-copy-prop" } */
+
+_BitInt(5) b5;
+
+char c;
+int i;
+_BitInt(129) b129;
+
+void
+foo(_BitInt(128) b128)
+{
+l50:
+  b128 %= b128 - b129;
+l64:
+  b128 %= c;
+  if (__builtin_add_overflow(i, 0, &c))
+    goto l50;
+  if (__builtin_sub_overflow(c, 0, &b5))
+    goto l64;
+}
diff --git a/gcc/value-relation.cc b/gcc/value-relation.cc
index 9293d9ed65b7..45722fcd13a6 100644
--- a/gcc/value-relation.cc
+++ b/gcc/value-relation.cc
@@ -607,7 +607,11 @@ equiv_oracle::register_initial_def (tree ssa)
   if (SSA_NAME_IS_DEFAULT_DEF (ssa))
     return;
   basic_block bb = gimple_bb (SSA_NAME_DEF_STMT (ssa));
-  gcc_checking_assert (bb && !find_equiv_dom (ssa, bb));
+
+  // If defining stmt is not in the IL, simply return.
+  if (!bb)
+    return;
+  gcc_checking_assert (!find_equiv_dom (ssa, bb));
 
   unsigned v = SSA_NAME_VERSION (ssa);
   bitmap_set_bit (m_equiv_set, v);