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- Fix typo "competing" -> "completing".
- Document reason waintcnt is added to store and not load for sequential consistent.
Cherry-pick of patch by Tony Tye
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D89596
Files:
llvm/docs/AMDGPUUsage.rst
Index: llvm/docs/AMDGPUUsage.rst
===================================================================
--- llvm/docs/AMDGPUUsage.rst
+++ llvm/docs/AMDGPUUsage.rst
@@ -6137,8 +6137,17 @@
preventing a store preventing a store
release followed by release followed by
load acquire from load acquire from
- competing out of competing out of
- order.) order.)
+ completing out of completing out of
+ order. The waitcnt order. The waitcnt
+ could be placed after could be placed after
+ seq_store or before seq_store or before
+ the seq_load. We the seq_load. We
+ choose the load to choose the load to
+ make the waitcnt be make the waitcnt be
+ as late as possible as late as possible
+ so that the store so that the store
+ may have already may have already
+ completed.) completed.)
2. *Following 2. *Following
instructions same as instructions same as
@@ -6224,8 +6233,17 @@
preventing a store
release followed by
load acquire from
- competing out of
- order.)
+ completing out of
+ order. The waitcnt
+ could be placed after
+ seq_store or before
+ the seq_load. We
+ choose the load to
+ make the waitcnt be
+ as late as possible
+ so that the store
+ may have already
+ completed.)
2. *Following
instructions same as
@@ -6323,8 +6341,17 @@
preventing a store preventing a store
release followed by release followed by
load acquire from load acquire from
- competing out of competing out of
- order.) order.)
+ completing out of completing out of
+ order. The waitcnt order. The waitcnt
+ could be placed after could be placed after
+ seq_store or before seq_store or before
+ the seq_load. We the seq_load. We
+ choose the load to choose the load to
+ make the waitcnt be make the waitcnt be
+ as late as possible as late as possible
+ so that the store so that the store
+ may have already may have already
+ completed.) completed.)
2. *Following 2. *Following
instructions same as instructions same as
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