[llvm] [AMDGPU]: Rewrite mbcnt_lo/mbcnt_hi to work item ID where applicable (PR #160496)

[Teja Alaghari via llvm-commits]

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@@ -0,0 +1,18 @@
+; RUN: opt -S -mtriple=amdgcn-unknown-amdhsa -passes=instcombine < %s | FileCheck %s
+; CHECK-NOT: and i32
+; CHECK-NOT: @llvm.amdgcn.workitem.id.x()
+
+; ModuleID = 'mbcnt_to_bitmask_neg'
+
+define i32 @kernel() !reqd_work_group_size !1 {
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TejaX-Alaghari wrote:

Renamed the function appropriately!

https://github.com/llvm/llvm-project/pull/160496