From 894a38753e8c4cfef7a1dae17a76b405208b2708 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timm=20B=C3=A4der?= <tbaeder@redhat.com>
Date: Thu, 16 Nov 2023 18:04:15 +0100
Subject: [clang][Interp][NFC] Properly implement IntegralAP::from(IntegralAP)

This used to just pass on the given parameter, but we need to respect
the given bit width.
---
 clang/lib/AST/Interp/IntegralAP.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'clang')

diff --git a/clang/lib/AST/Interp/IntegralAP.h b/clang/lib/AST/Interp/IntegralAP.h
index bd665959c..9019f32 100644
--- a/clang/lib/AST/Interp/IntegralAP.h
+++ b/clang/lib/AST/Interp/IntegralAP.h
@@ -102,7 +102,12 @@ public:
 
   template <bool InputSigned>
   static IntegralAP from(IntegralAP<InputSigned> V, unsigned NumBits = 0) {
-    return IntegralAP<Signed>(V.V);
+    if (NumBits == 0)
+      NumBits = V.bitWidth();
+
+    if constexpr (InputSigned)
+      return IntegralAP<Signed>(V.V.sextOrTrunc(NumBits));
+    return IntegralAP<Signed>(V.V.zextOrTrunc(NumBits));
   }
 
   template <unsigned Bits, bool InputSigned>
-- 
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