commit:     8de62fc16a21ace578aa2fc9922e288c5ad62c79
Author:     Sam James <sam <AT> gentoo <DOT> org>
AuthorDate: Thu Mar  5 00:06:14 2026 +0000
Commit:     Sam James <sam <AT> gentoo <DOT> org>
CommitDate: Thu Mar  5 00:07:06 2026 +0000
URL:        https://gitweb.gentoo.org/proj/gcc-patches.git/commit/?id=8de62fc1

16.0.0: add firefox PGO patch

Bug: https://gcc.gnu.org/PR124291
Signed-off-by: Sam James <sam <AT> gentoo.org>

 16.0.0/gentoo/88_all_PR124291-firefox.patch | 27 +++++++++++++++++++++++++++
 16.0.0/gentoo/README.history                |  1 +
 2 files changed, 28 insertions(+)

diff --git a/16.0.0/gentoo/88_all_PR124291-firefox.patch 
b/16.0.0/gentoo/88_all_PR124291-firefox.patch
new file mode 100644
index 0000000..56debcd
--- /dev/null
+++ b/16.0.0/gentoo/88_all_PR124291-firefox.patch
@@ -0,0 +1,27 @@
+https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124291#c12
+--- a/gcc/ipa-cp.cc
++++ b/gcc/ipa-cp.cc
+@@ -5920,11 +5920,19 @@ ipcp_val_replacement_ok_p (vec<tree> &,
+                          int index, HOST_WIDE_INT offset,
+                          ipa_polymorphic_call_context value)
+ {
+-  if (offset != -1)
++  if (offset != -1
++      || known_contexts.length () <= (unsigned) index
++      || known_contexts[index].useless_p ())
+     return false;
+-  return (known_contexts.length () > (unsigned) index
+-        && !known_contexts[index].useless_p ()
+-        && known_contexts[index].equal_to (value));
++
++  if (known_contexts[index].equal_to (value))
++    return true;
++
++  /* In some corner cases, the final gathering of contexts can figure out that
++     the available context is actually more precise than what we wanted to
++     clone for.  Allow it.  */
++  value.combine_with (known_contexts[index]);
++  return known_contexts[index].equal_to (value);
+ }
+ 
+ /* Decide whether to create a special version of NODE for value VAL of

diff --git a/16.0.0/gentoo/README.history b/16.0.0/gentoo/README.history
index de88438..00e8464 100644
--- a/16.0.0/gentoo/README.history
+++ b/16.0.0/gentoo/README.history
@@ -1,6 +1,7 @@
 39     ????
 
        - 85_all_PR120987-ipa-modref-typo.patch
+       + 88_all_PR124291-firefox.patch
 
 38     22 February 2026
 

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