[clang] [llvm] [AMDGPU] Add support for `v_prng_b32` on gfx1250 (PR #149450)

[Shilei Tian via cfe-commits]

================
@@ -4007,7 +4007,8 @@ SDValue 
AMDGPUTargetLowering::performIntrinsicWOChainCombine(
   case Intrinsic::amdgcn_rcp_legacy:
   case Intrinsic::amdgcn_rsq_legacy:
   case Intrinsic::amdgcn_rsq_clamp:
-  case Intrinsic::amdgcn_tanh: {
+  case Intrinsic::amdgcn_tanh:
+  case Intrinsic::amdgcn_prng_b32: {
----------------
shiltian wrote:

I removed it. Will do it in a follow up.

https://github.com/llvm/llvm-project/pull/149450
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