add lto pipeline test

Author: Pierre-vh

llvm/test/CodeGen/AMDGPU/lto-lower-module-lds.ll

@@ -0,0 +1,47 @@
+
+; Default O0
+; RUN: opt -mtriple=amdgcn-- -mcpu=gfx1030 %s -o %t.bc
+; RUN: llvm-lto2 run -O0 -cg-opt-level 0 %t.bc -o %t.s -r %t.bc,test,px -debug-pass-manager -debug-pass=Structure 2>&1 | FileCheck %s
+
+; Unified O0
+; RUN: opt -unified-lto -thinlto-split-lto-unit -thinlto-bc -mtriple=amdgcn-- -mcpu=gfx1030 %s -o %t.bc
+; RUN: llvm-lto2 run -unified-lto=full -O0 -cg-opt-level 0 %t.bc -o %t.s -r %t.bc,test,px -debug-pass-manager -debug-pass=Structure 2>&1 | FileCheck %s
+
+; Default O1
+; RUN: opt -mtriple=amdgcn-- -mcpu=gfx1030 %s -o %t.bc
+; RUN: llvm-lto2 run -O1 -cg-opt-level 1 %t.bc -o %t.s -r %t.bc,test,px -debug-pass-manager -debug-pass=Structure 2>&1 | FileCheck %s
+
+; Unified O1
+; RUN: opt -unified-lto -thinlto-split-lto-unit -thinlto-bc -mtriple=amdgcn-- -mcpu=gfx1030 %s -o %t.bc
+; RUN: llvm-lto2 run -unified-lto=full -O1 -cg-opt-level 1 %t.bc -o %t.s -r %t.bc,test,px -debug-pass-manager -debug-pass=Structure 2>&1 | FileCheck %s
+
+; Default O2
+; RUN: opt -mtriple=amdgcn-- -mcpu=gfx1030 %s -o %t.bc
+; RUN: llvm-lto2 run -O2 -cg-opt-level 2 %t.bc -o %t.s -r %t.bc,test,px -debug-pass-manager -debug-pass=Structure 2>&1 | FileCheck %s
+
+; Unified O2
+; RUN: opt -unified-lto -thinlto-split-lto-unit -thinlto-bc -mtriple=amdgcn-- -mcpu=gfx1030 %s -o %t.bc
+; RUN: llvm-lto2 run -unified-lto=full -O2 -cg-opt-level 2 %t.bc -o %t.s -r %t.bc,test,px -debug-pass-manager -debug-pass=Structure 2>&1 | FileCheck %s
+
+; Default O3
+; RUN: opt -mtriple=amdgcn-- -mcpu=gfx1030 %s -o %t.bc
+; RUN: llvm-lto2 run -O3 -cg-opt-level 3 %t.bc -o %t.s -r %t.bc,test,px -debug-pass-manager -debug-pass=Structure 2>&1 | FileCheck %s
+
+; Unified O3
+; RUN: opt -unified-lto -thinlto-split-lto-unit -thinlto-bc -mtriple=amdgcn-- -mcpu=gfx1030 %s -o %t.bc
+; RUN: llvm-lto2 run -unified-lto=full -O3 -cg-opt-level 3 %t.bc -o %t.s -r %t.bc,test,px -debug-pass-manager -debug-pass=Structure 2>&1 | FileCheck %s
+
+; First print will be from the New PM during the full LTO pipeline.
+; Second print will be from the legacy PM during the CG pipeline.
+
+; CHECK: Running pass: AMDGPULowerModuleLDSPass on [module]
+; CHECK: ModulePass Manager
+; CHECK:   Lower uses of LDS variables from non-kernel functions
+
+@lds = internal unnamed_addr addrspace(3) global i32 undef, align 4
+
+define amdgpu_kernel void @test() {
+entry:
+  store i32 1, ptr addrspace(3) @lds
+  ret void
+}