[clang] [llvm] [SimplifyLibCalls] Combine sin/cos libcall pairs into llvm.sincos (PR #184760)

[Kito Cheng via cfe-commits]

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@@ -3117,20 +3144,28 @@ void LibCallSimplifier::classifyArgUse(
       !isTrigLibCall(CI))
     return;
 
-  if (IsFloat) {
-    if (Func == LibFunc_sinpif)
-      SinCalls.push_back(CI);
-    else if (Func == LibFunc_cospif)
-      CosCalls.push_back(CI);
-    else if (Func == LibFunc_sincospif_stret)
-      SinCosCalls.push_back(CI);
+  if (IsPi) {
+    if (IsFloat) {
+      if (Func == LibFunc_sinpif)
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kito-cheng wrote:

Updated with this approach 

https://github.com/llvm/llvm-project/pull/184760