llvm-project

37e7ef09 - [SPIRV] Expand spv_bitcast intrinsic during instruction selection (#164884)

[SPIRV] Expand spv_bitcast intrinsic during instruction selection (#164884) The spv_bitcast intrinsic is currently replaced by an OpBitcast during prelegalization. This will cause a problem when we need to legalize the OpBitcast. The legalizer assumes that instruction already lowered to a target specific opcode is legal. We cannot lower it to a G_BITCAST because the bitcasts sometimes the LLT type will be the same, causing an error in the verifier, even if the SPIR-V types will be different. This commit keeps the intrinsic around until instruction selection. We can create rules to legalize a G_INTRINISIC* instruction, and it does not create problem for the verifier. No tests are updated because this change should be invisible to users.