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

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<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Timm Baeder (tbaederr)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/196949.diff


2 Files Affected:

- (modified) clang/lib/AST/ByteCode/Opcodes.td (+1-1) 
- (modified) clang/test/AST/ByteCode/fixed-point.cpp (+5) 


``````````diff
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;

``````````

</details>


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