[llvm] [AMDGPU] Enable "amdgpu-sw-lower-lds" pass in pipeline. (PR #89206)

[via llvm-commits]

https://github.com/skc7 updated https://github.com/llvm/llvm-project/pull/89206

>From 8389b237624ac198190f29db87e55da1cfd3161a Mon Sep 17 00:00:00 2001
From: skc7 <Krishna.Sankisa at amd.com>
Date: Thu, 18 Apr 2024 15:58:10 +0530
Subject: [PATCH] [AMDGPU] Enable amdgpu-sw-lower-lds pass in pipeline.

---
 llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
index f50a18ccc2188..aa4c952dc899e 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
@@ -337,6 +337,10 @@ static cl::opt<bool> EnableStructurizerWorkarounds(
     cl::desc("Enable workarounds for the StructurizeCFG pass"), cl::init(true),
     cl::Hidden);
 
+static cl::opt<bool> EnableSwLowerLDS("amdgpu-enable-sw-lower-lds",
+                                      cl::desc("Enable sw lower lds pass"),
+                                      cl::init(true), cl::Hidden);
+
 static cl::opt<bool, true> EnableLowerModuleLDS(
     "amdgpu-enable-lower-module-lds", cl::desc("Enable lower module lds pass"),
     cl::location(AMDGPUTargetMachine::EnableLowerModuleLDS), cl::init(true),
@@ -736,6 +740,8 @@ void AMDGPUTargetMachine::registerPassBuilderCallbacks(PassBuilder &PB) {
         // We want to support the -lto-partitions=N option as "best effort".
         // For that, we need to lower LDS earlier in the pipeline before the
         // module is partitioned for codegen.
+        if (EnableSwLowerLDS)
+          PM.addPass(AMDGPUSwLowerLDSPass(*this));
         if (EnableLowerModuleLDS)
           PM.addPass(AMDGPULowerModuleLDSPass(*this));
       });
@@ -1032,6 +1038,10 @@ void AMDGPUPassConfig::addIRPasses() {
   // Replace OpenCL enqueued block function pointers with global variables.
   addPass(createAMDGPUOpenCLEnqueuedBlockLoweringPass());
 
+  // Lower LDS accesses to global memory if address sanitizer is enabled.
+  if (EnableSwLowerLDS)
+    addPass(createAMDGPUSwLowerLDSLegacyPass(&TM));
+
   // Runs before PromoteAlloca so the latter can account for function uses
   if (EnableLowerModuleLDS) {
     addPass(createAMDGPULowerModuleLDSLegacyPass(&TM));