[clang] [clang][bytecode] Allow IntAP(S) in CastIntegralFixedPoint op (PR #196949)

[Timm Baeder via cfe-commits]

https://github.com/tbaederr created https://github.com/llvm/llvm-project/pull/196949

None

>From d57346798c2a3fba0a55c5c1778eff1be7f8268e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timm=20B=C3=A4der?= <tbaeder at redhat.com>
Date: Mon, 11 May 2026 15:31:54 +0200
Subject: [PATCH] [clang][bytecode] Allow IntAP(S) in CastIntegralFixedPoint op

---
 clang/lib/AST/ByteCode/Opcodes.td       | 2 +-
 clang/test/AST/ByteCode/fixed-point.cpp | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/clang/lib/AST/ByteCode/Opcodes.td b/clang/lib/AST/ByteCode/Opcodes.td
index 3fb25a5fa0884..a9bac64636cc7 100644
--- a/clang/lib/AST/ByteCode/Opcodes.td
+++ b/clang/lib/AST/ByteCode/Opcodes.td
@@ -758,7 +758,7 @@ def CastPointerIntegralAPS : Opcode {
   let Args = [ArgUint32];
 }
 def CastIntegralFixedPoint : Opcode {
-  let Types = [FixedSizeIntegralTypeClass];
+  let Types = [IntegralTypeClass];
   let Args = [ArgUint32];
   let HasGroup = 1;
 }
diff --git a/clang/test/AST/ByteCode/fixed-point.cpp b/clang/test/AST/ByteCode/fixed-point.cpp
index c8baa1972536a..fb44558fc037b 100644
--- a/clang/test/AST/ByteCode/fixed-point.cpp
+++ b/clang/test/AST/ByteCode/fixed-point.cpp
@@ -20,6 +20,11 @@ static_assert(A == 0.0k);
 static_assert(A == 0);
 static_assert(!A);
 
+#ifdef __SIZEOF_INT128__
+constexpr __int128 i128 = 42;
+static_assert(i128 == 42.0k, "");
+#endif
+
 constexpr bool toBool() {
   if (A)
     return true;