[AMDGPU] Remove dead handling of S_SETPC_B64

[rampitec]

At the very least there are no tests covering this. Nothing breaks when I remove it.

[llvmbot]

@llvm/pr-subscribers-backend-amdgpu

Author: Stanislav Mekhanoshin (rampitec)

Changes

At the very least there are no tests covering this. Nothing breaks when I remove it.

---

Full diff: https://github.com/llvm/llvm-project/pull/71275.diff

1 Files Affected:

• (modified) llvm/lib/Target/AMDGPU/SIInstrInfo.cpp (-6)

diff --git a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
index d73328d67f6078e..41e53e81046fef1 100644
--- a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
@@ -2776,12 +2776,6 @@ bool SIInstrInfo::isBranchOffsetInRange(unsigned BranchOp,
 
 MachineBasicBlock *SIInstrInfo::getBranchDestBlock(
   const MachineInstr &MI) const {
-  if (MI.getOpcode() == AMDGPU::S_SETPC_B64) {
-    // This would be a difficult analysis to perform, but can always be legal so
-    // there's no need to analyze it.
-    return nullptr;
-  }
-
   return MI.getOperand(0).getMBB();
 }
 

[github-actions]

✅ With the latest revision this PR passed the C/C++ code formatter.

[jayfoad]

I guess this is fine if test/CodeGen/AMDGPU/branch-relax* does not hit it.