[AMDGPU] Avoid repeated hash lookups (NFC)

[kazutakahirata]

No description provided.

[llvmbot]

@llvm/pr-subscribers-backend-amdgpu

Author: Kazu Hirata (kazutakahirata)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/126430.diff

1 Files Affected:

• (modified) llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp (+1-2)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp b/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
index 28a27ffc136776..69ddb384e1a400 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
@@ -839,10 +839,9 @@ bool AMDGPUPromoteAllocaImpl::tryPromoteAllocaToVector(AllocaInst &Alloca) {
         return RejectUser(Inst, "mem transfer inst length is non-constant or "
                                 "not a multiple of the vector element size");
 
-      if (!TransferInfo.count(TransferInst)) {
+      if (TransferInfo.try_emplace(TransferInst).second) {
         DeferredInsts.push_back(Inst);
         WorkList.push_back(Inst);
-        TransferInfo[TransferInst] = MemTransferInfo();
       }
 
       auto getPointerIndexOfAlloca = [&](Value *Ptr) -> ConstantInt * {