[AMDGPU][CodeGen] SILowerWWMCopies: Declare used analyses

[optimisan]

This prevents legacy PM from mistakenly removing these analyses if SILowerWWMCopies is the last user of them. (it removes dead analyses after its last use)

[optimisan]

• [AMDGPU][NewPM] Port SILowerWWMCopies to NPM #123695
• [AMDGPU][CodeGen] SILowerWWMCopies: Declare used analyses #123710 👈 (View in Graphite)
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[llvmbot]

@llvm/pr-subscribers-backend-amdgpu

Author: Akshat Oke (optimisan)

Changes

This prevents legacy PM from mistakenly removing these analyses if SILowerWWMCopies is the last user of them. (it removes dead analyses after its last use)

---

Full diff: https://github.com/llvm/llvm-project/pull/123710.diff

1 Files Affected:

• (modified) llvm/lib/Target/AMDGPU/SILowerWWMCopies.cpp (+3)

diff --git a/llvm/lib/Target/AMDGPU/SILowerWWMCopies.cpp b/llvm/lib/Target/AMDGPU/SILowerWWMCopies.cpp
index c663820311b8ce..d80a5f958273a9 100644
--- a/llvm/lib/Target/AMDGPU/SILowerWWMCopies.cpp
+++ b/llvm/lib/Target/AMDGPU/SILowerWWMCopies.cpp
@@ -43,6 +43,9 @@ class SILowerWWMCopies : public MachineFunctionPass {
   StringRef getPassName() const override { return "SI Lower WWM Copies"; }
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.addUsedIfAvailable<LiveIntervalsWrapperPass>();
+    AU.addUsedIfAvailable<SlotIndexesWrapperPass>();
+    AU.addUsedIfAvailable<VirtRegMapWrapperLegacy>();
     AU.setPreservesAll();
     MachineFunctionPass::getAnalysisUsage(AU);
   }