[clang] [clang] Add sincos builtin using `llvm.sincos` intrinsic (PR #114086)

[Matt Arsenault via cfe-commits]

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@@ -722,6 +722,38 @@ static Value *emitFrexpBuiltin(CodeGenFunction &CGF, const CallExpr *E,
   return CGF.Builder.CreateExtractValue(Call, 0);
 }
 
+static void emitSincosBuiltin(CodeGenFunction &CGF, const CallExpr *E,
+                              llvm::Intrinsic::ID IntrinsicID) {
+  llvm::Value *Val = CGF.EmitScalarExpr(E->getArg(0));
+  llvm::Value *Dest0 = CGF.EmitScalarExpr(E->getArg(1));
+  llvm::Value *Dest1 = CGF.EmitScalarExpr(E->getArg(2));
+
+  llvm::Function *F = CGF.CGM.getIntrinsic(IntrinsicID, {Val->getType()});
+  llvm::Value *Call = CGF.Builder.CreateCall(F, Val);
+
+  llvm::Value *SinResult = CGF.Builder.CreateExtractValue(Call, 0);
+  llvm::Value *CosResult = CGF.Builder.CreateExtractValue(Call, 1);
+
+  QualType DestPtrType = E->getArg(1)->getType()->getPointeeType();
+  LValue SinLV = CGF.MakeNaturalAlignAddrLValue(Dest0, DestPtrType);
+  LValue CosLV = CGF.MakeNaturalAlignAddrLValue(Dest1, DestPtrType);
+
+  llvm::StoreInst *StoreSin =
+      CGF.Builder.CreateStore(SinResult, SinLV.getAddress());
+  llvm::StoreInst *StoreCos =
+      CGF.Builder.CreateStore(CosResult, CosLV.getAddress());
+
+  // Mark the two stores as non-aliasing with eachother. The order of stores
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arsenm wrote:

Typo eachother

https://github.com/llvm/llvm-project/pull/114086