[llvm-branch-commits] [llvm] [AMDGPU][SDAG] Add test for ISD::PTRADD handling in SelectionDAGAddressAnalysis (PR #142777)

[Fabian Ritter via llvm-branch-commits]

https://github.com/ritter-x2a updated https://github.com/llvm/llvm-project/pull/142777

>From 5df6cfa5619d18767ed610fb594882804b09d59c Mon Sep 17 00:00:00 2001
From: Fabian Ritter <fabian.ritter at amd.com>
Date: Wed, 4 Jun 2025 09:30:34 -0400
Subject: [PATCH] [AMDGPU][SDAG] Add test for ISD::PTRADD handling in
 SelectionDAGAddressAnalysis

Pre-committing test to show improvements in a follow-up PR.
---
 .../AMDGPU/ptradd-sdag-optimizations.ll       | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/llvm/test/CodeGen/AMDGPU/ptradd-sdag-optimizations.ll b/llvm/test/CodeGen/AMDGPU/ptradd-sdag-optimizations.ll
index b78dea1684545..d3242905ada64 100644
--- a/llvm/test/CodeGen/AMDGPU/ptradd-sdag-optimizations.ll
+++ b/llvm/test/CodeGen/AMDGPU/ptradd-sdag-optimizations.ll
@@ -126,3 +126,31 @@ define amdgpu_kernel void @llvm_amdgcn_queue_ptr(ptr addrspace(1) %ptr)  #0 {
   store volatile i64 %dispatch.id, ptr addrspace(1) %ptr
   ret void
 }
+
+; Taken from memcpy-param-combinations.ll, tests PTRADD handling in
+; SelectionDAGAddressAnalysis.
+define void @memcpy_p1_p4_sz16_align_1_1(ptr addrspace(1) align 1 %dst, ptr addrspace(4) align 1 readonly %src) {
+; GFX942_PTRADD-LABEL: memcpy_p1_p4_sz16_align_1_1:
+; GFX942_PTRADD:       ; %bb.0: ; %entry
+; GFX942_PTRADD-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX942_PTRADD-NEXT:    global_load_dwordx2 v[4:5], v[2:3], off
+; GFX942_PTRADD-NEXT:    s_waitcnt vmcnt(0)
+; GFX942_PTRADD-NEXT:    global_store_dwordx2 v[0:1], v[4:5], off
+; GFX942_PTRADD-NEXT:    global_load_dwordx2 v[2:3], v[2:3], off offset:8
+; GFX942_PTRADD-NEXT:    s_waitcnt vmcnt(0)
+; GFX942_PTRADD-NEXT:    global_store_dwordx2 v[0:1], v[2:3], off offset:8
+; GFX942_PTRADD-NEXT:    s_waitcnt vmcnt(0)
+; GFX942_PTRADD-NEXT:    s_setpc_b64 s[30:31]
+;
+; GFX942_LEGACY-LABEL: memcpy_p1_p4_sz16_align_1_1:
+; GFX942_LEGACY:       ; %bb.0: ; %entry
+; GFX942_LEGACY-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX942_LEGACY-NEXT:    global_load_dwordx4 v[2:5], v[2:3], off
+; GFX942_LEGACY-NEXT:    s_waitcnt vmcnt(0)
+; GFX942_LEGACY-NEXT:    global_store_dwordx4 v[0:1], v[2:5], off
+; GFX942_LEGACY-NEXT:    s_waitcnt vmcnt(0)
+; GFX942_LEGACY-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  tail call void @llvm.memcpy.p1.p4.i64(ptr addrspace(1) noundef nonnull align 1 %dst, ptr addrspace(4) noundef nonnull align 1 %src, i64 16, i1 false)
+  ret void
+}