[llvm] [AMDGPU] Skip non-first termintors when forcing emit zero flag (PR #112116)

[Shilei Tian via llvm-commits]

================
@@ -0,0 +1,21 @@
+# RUN: llc -mtriple=amdgcn-amd-amdhsa -run-pass si-insert-waitcnts -amdgpu-waitcnt-forcezero=1 %s -o - | FileCheck %s
----------------
shiltian wrote:

For some reason the script generates nothing for this test case. Not very sure what's going on.

https://github.com/llvm/llvm-project/pull/112116