llvm-project

06ab30b5 - [AMDGPU] Constant folding of llvm.amdgcn.trig.preop (#98562)

[AMDGPU] Constant folding of llvm.amdgcn.trig.preop (#98562) If the parameters(the input and segment select) coming in to amdgcn.trig.preop intrinsic are compile time constants, we pre-compute the output of amdgcn.trig.preop on the CPU and replaces the uses with the computed constant. This work extends the patch https://reviews.llvm.org/D120150 to make it a complete coverage. For the segment select, only src1[4:0] are used. A segment select is invalid if we are selecting the 53-bit segment beyond the [1200:0] range of the 2/PI table. 0 is returned when a segment select is not valid.