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

[Kito Cheng via cfe-commits]

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@@ -3,6 +3,8 @@
 #pragma OPENCL EXTENSION cl_khr_fp16 : enable
 
 // CHECK-LABEL: define{{.*}} void @test_half_builtins
+// sin and cos with the same argument are combined into sincos
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kito-cheng wrote:

I only split out sin/cos to prevent disturb this testcase too much :)

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