[clang] [llvm] Revert "[InstCombine] Combine llvm.sin/llvm.cos libcall pairs into llvm.sincos" (PR #194589)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cl,cpp -- clang/test/CodeGenOpenCL/builtins-f16.cl llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
index b60f0c702..dc79a4c35 100644
--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -4042,7 +4042,7 @@ Value *LibCallSimplifier::optimizeFloatingPointLibCall(CallInst *CI,
     return optimizeSinCosPi(CI, /*IsSin*/true, Builder);
   case LibFunc_cospif:
   case LibFunc_cospi:
-    return optimizeSinCosPi(CI, /*IsSin*/false, Builder);
+    return optimizeSinCosPi(CI, /*IsSin*/ false, Builder);
   case LibFunc_powf:
   case LibFunc_pow:
   case LibFunc_powl:

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https://github.com/llvm/llvm-project/pull/194589