[clang] 875841c - [clang][bytecode] Avoid a getValue() call in builtin_isinf (#152939)

[via cfe-commits]

Author: Timm Baeder
Date: 2025-08-11T07:11:38+02:00
New Revision: 875841c93d20706842df86964568bd9b44436ff6

URL: https://github.com/llvm/llvm-project/commit/875841c93d20706842df86964568bd9b44436ff6
DIFF: https://github.com/llvm/llvm-project/commit/875841c93d20706842df86964568bd9b44436ff6.diff

LOG: [clang][bytecode] Avoid a getValue() call in builtin_isinf (#152939)

Get the APFloat once and work with that, instead of calling isInf() and
potentially isNegative().

Added: 
    

Modified: 
    clang/lib/AST/ByteCode/InterpBuiltin.cpp

Removed: 
    


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diff  --git a/clang/lib/AST/ByteCode/InterpBuiltin.cpp b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
index 14f6929037ff5..ad923a52a4ce1 100644
--- a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
+++ b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
@@ -459,12 +459,13 @@ static bool interp__builtin_isinf(InterpState &S, CodePtr OpPC,
                                   const InterpFrame *Frame, bool CheckSign,
                                   const CallExpr *Call) {
   const Floating &Arg = S.Stk.pop<Floating>();
-  bool IsInf = Arg.isInf();
+  APFloat F = Arg.getAPFloat();
+  bool IsInf = F.isInfinity();
 
   if (CheckSign)
-    pushInteger(S, IsInf ? (Arg.isNegative() ? -1 : 1) : 0, Call->getType());
+    pushInteger(S, IsInf ? (F.isNegative() ? -1 : 1) : 0, Call->getType());
   else
-    pushInteger(S, Arg.isInf(), Call->getType());
+    pushInteger(S, IsInf, Call->getType());
   return true;
 }