[llvm] 6633916 - [RISCV] Remove getPostRAMutations (#117527)

[via llvm-commits]

Author: Pengcheng Wang
Date: 2024-11-26T10:55:43+08:00
New Revision: 6633916ef5ab17bae9b2214a9e3327295ce56b5a

URL: https://github.com/llvm/llvm-project/commit/6633916ef5ab17bae9b2214a9e3327295ce56b5a
DIFF: https://github.com/llvm/llvm-project/commit/6633916ef5ab17bae9b2214a9e3327295ce56b5a.diff

LOG: [RISCV] Remove getPostRAMutations (#117527)

We are using `PostMachineScheduler` instead of `PostRAScheduler`
since #68696.

The hook `getPostRAMutations` is only used in `PostRAScheduler` so
it is actually dead code for RISC-V now.

Added: 
    

Modified: 
    llvm/lib/Target/RISCV/RISCVSubtarget.cpp
    llvm/lib/Target/RISCV/RISCVSubtarget.h

Removed: 
    


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diff  --git a/llvm/lib/Target/RISCV/RISCVSubtarget.cpp b/llvm/lib/Target/RISCV/RISCVSubtarget.cpp
index 03397e1e0d89ee..426d3682049046 100644
--- a/llvm/lib/Target/RISCV/RISCVSubtarget.cpp
+++ b/llvm/lib/Target/RISCV/RISCVSubtarget.cpp
@@ -186,11 +186,6 @@ bool RISCVSubtarget::useRVVForFixedLengthVectors() const {
 
 bool RISCVSubtarget::enableSubRegLiveness() const { return true; }
 
-void RISCVSubtarget::getPostRAMutations(
-    std::vector<std::unique_ptr<ScheduleDAGMutation>> &Mutations) const {
-  Mutations.push_back(createMacroFusionDAGMutation(getMacroFusions()));
-}
-
   /// Enable use of alias analysis during code generation (during MI
   /// scheduling, DAGCombine, etc.).
 bool RISCVSubtarget::useAA() const { return UseAA; }

diff  --git a/llvm/lib/Target/RISCV/RISCVSubtarget.h b/llvm/lib/Target/RISCV/RISCVSubtarget.h
index f2c0a3d85c998a..043838e13b964d 100644
--- a/llvm/lib/Target/RISCV/RISCVSubtarget.h
+++ b/llvm/lib/Target/RISCV/RISCVSubtarget.h
@@ -301,9 +301,6 @@ class RISCVSubtarget : public RISCVGenSubtargetInfo {
 
   bool enableSubRegLiveness() const override;
 
-  void getPostRAMutations(std::vector<std::unique_ptr<ScheduleDAGMutation>>
-                              &Mutations) const override;
-
   bool useAA() const override;
 
   unsigned getCacheLineSize() const override {