[clang] [Clang] VectorExprEvaluator::VisitCallExpr / InterpretBuiltin - allow insertps intrinsic to be used in constexp (PR #165513)

via cfe-commits cfe-commits at lists.llvm.org
Tue Oct 28 23:02:17 PDT 2025


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,c -- clang/lib/AST/ByteCode/InterpBuiltin.cpp clang/lib/AST/ExprConstant.cpp clang/test/CodeGen/X86/sse41-builtins.c --diff_from_common_commit
``````````

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in a stack if you are using a stacked PR workflow. You can limit the results by
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/AST/ByteCode/InterpBuiltin.cpp b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
index c4d92804d..117b10b1c 100644
--- a/clang/lib/AST/ByteCode/InterpBuiltin.cpp
+++ b/clang/lib/AST/ByteCode/InterpBuiltin.cpp
@@ -3431,11 +3431,10 @@ static bool interp__builtin_ia32_shuffle_generic(
     if (ShouldZero && ShouldZero(DstIdx, ShuffleMask)) {
       // Zero out this element
       if (ElemT == PT_Float) {
-        Dst.elem<Floating>(DstIdx) = Floating(S.getASTContext().getFloatTypeSemantics(VecT->getElementType()));
+        Dst.elem<Floating>(DstIdx) = Floating(
+            S.getASTContext().getFloatTypeSemantics(VecT->getElementType()));
       } else {
-        INT_TYPE_SWITCH_NO_BOOL(ElemT, {
-          Dst.elem<T>(DstIdx) = T::from(0);
-        });
+        INT_TYPE_SWITCH_NO_BOOL(ElemT, { Dst.elem<T>(DstIdx) = T::from(0); });
       }
     } else {
       auto [SrcVecIdx, SrcIdx] = GetSourceIndex(DstIdx, ShuffleMask);
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index d27e92394..d406ac52f 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -11647,7 +11647,8 @@ static bool evalShuffleGeneric(
     if (ShouldZero && ShouldZero(DstIdx, ShuffleMask)) {
       // Zero out this element
       QualType ElemTy = VT->getElementType();
-      ResultElements.push_back(APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(ElemTy))));
+      ResultElements.push_back(
+          APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(ElemTy))));
     } else {
       auto [SrcVecIdx, SrcIdx] = GetSourceIndex(DstIdx, ShuffleMask);
       const APValue &Src = (SrcVecIdx == 0) ? A : B;
@@ -12492,7 +12493,8 @@ bool VectorExprEvaluator::VisitCallExpr(const CallExpr *E) {
     APValue R;
     if (!evalShuffleGeneric(
             Info, E, R,
-            [](unsigned DstIdx, unsigned Mask) -> std::pair<unsigned, unsigned> {
+            [](unsigned DstIdx,
+               unsigned Mask) -> std::pair<unsigned, unsigned> {
               // Bits [7:6]: select element from source vector Y (0-3)
               // Bits [5:4]: select destination position (0-3)
               unsigned SrcElem = (Mask >> 6) & 0x3;

``````````

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https://github.com/llvm/llvm-project/pull/165513


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