[AMDGPU][PromoteAlloca] Drop bitcast handling

[Pierre-vh]

This is no longer needed with opaque pointers.

[llvmbot]

@llvm/pr-subscribers-backend-amdgpu

Author: Pierre van Houtryve (Pierre-vh)

Changes

This is no longer needed with opaque pointers.

---

Full diff: https://github.com/llvm/llvm-project/pull/85747.diff

1 Files Affected:

• (modified) llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp (-8)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp b/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
index b1b15e9915aea3..e86132769f5788 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
@@ -724,14 +724,6 @@ bool AMDGPUPromoteAllocaImpl::tryPromoteAllocaToVector(AllocaInst &Alloca) {
       continue;
     }
 
-    if (isa<BitCastInst>(Inst)) {
-      // Look through bitcasts.
-      for (Use &U : Inst->uses())
-        Uses.push_back(&U);
-      UsersToRemove.push_back(Inst);
-      continue;
-    }
-
     if (auto *GEP = dyn_cast<GetElementPtrInst>(Inst)) {
       // If we can't compute a vector index from this GEP, then we can't
       // promote this alloca to vector.