[llvm] [TableGen] Remove unnecessary sortAndUniqueRegisters (PR #149125)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-tablegen

Author: Jay Foad (jayfoad)

<details>
<summary>Changes</summary>

Each of the SRSets is already sorted and unique because it is a filtered
version of RC->getMembers() which is already sorted and unique.


---
Full diff: https://github.com/llvm/llvm-project/pull/149125.diff


1 Files Affected:

- (modified) llvm/utils/TableGen/Common/CodeGenRegisters.cpp (-3) 


``````````diff
diff --git a/llvm/utils/TableGen/Common/CodeGenRegisters.cpp b/llvm/utils/TableGen/Common/CodeGenRegisters.cpp
index c43cc9afe1e3c..1fb2918a72636 100644
--- a/llvm/utils/TableGen/Common/CodeGenRegisters.cpp
+++ b/llvm/utils/TableGen/Common/CodeGenRegisters.cpp
@@ -2295,9 +2295,6 @@ void CodeGenRegBank::inferSubClassWithSubReg(CodeGenRegisterClass *RC) {
       SRSets[I].push_back(R);
   }
 
-  for (auto I : SRSets)
-    sortAndUniqueRegisters(I.second);
-
   // Find matching classes for all SRSets entries.  Iterate in SubRegIndex
   // numerical order to visit synthetic indices last.
   for (const CodeGenSubRegIndex &SubIdx : SubRegIndices) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/149125