1 files changed, 120 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopUnroll/AMDGPU/unroll-for-private.ll b/llvm/test/Transforms/LoopUnroll/AMDGPU/unroll-for-private.ll
new file mode 100644
index 00000000000..4fdff6691ad
--- /dev/null
+++ b/llvm/test/Transforms/LoopUnroll/AMDGPU/unroll-for-private.ll
@@ -0,0 +1,120 @@
+; RUN: opt -mtriple=amdgcn-unknown-amdhsa -loop-unroll -S -amdgpu-unroll-threshold-private=20000 %s | FileCheck %s
+
+; Check that we full unroll loop to be able to eliminate alloca
+; CHECK-LABEL: @non_invariant_ind
+; CHECK:       for.body:
+; CHECK-NOT:   br
+; CHECK:       store i32 %tmp15, i32 addrspace(1)* %arrayidx7, align 4
+; CHECK:       ret void
+
+define void @non_invariant_ind(i32 addrspace(1)* nocapture %a, i32 %x) {
+entry:
+  %arr = alloca [64 x i32], align 4
+  %tmp1 = tail call i32 @llvm.amdgcn.workitem.id.x() #1
+  br label %for.body
+
+for.cond.cleanup:                                 ; preds = %for.body
+  %arrayidx5 = getelementptr inbounds [64 x i32], [64 x i32]* %arr, i32 0, i32 %x
+  %tmp15 = load i32, i32* %arrayidx5, align 4
+  %arrayidx7 = getelementptr inbounds i32, i32 addrspace(1)* %a, i32 %tmp1
+  store i32 %tmp15, i32 addrspace(1)* %arrayidx7, align 4
+  ret void
+
+for.body:                                         ; preds = %for.body, %entry
+  %i.015 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+  %idxprom = sext i32 %i.015 to i64
+  %arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %a, i64 %idxprom
+  %tmp16 = load i32, i32 addrspace(1)* %arrayidx, align 4
+  %add = add nsw i32 %i.015, %tmp1
+  %rem = srem i32 %add, 64
+  %arrayidx3 = getelementptr inbounds [64 x i32], [64 x i32]* %arr, i32 0, i32 %rem
+  store i32 %tmp16, i32* %arrayidx3, align 4
+  %inc = add nuw nsw i32 %i.015, 1
+  %exitcond = icmp eq i32 %inc, 100
+  br i1 %exitcond, label %for.cond.cleanup, label %for.body
+}
+
+; Check that we unroll inner loop but not outer
+; CHECK-LABEL: @invariant_ind
+; CHECK:       %[[exitcond:[^ ]+]] = icmp eq i32 %{{.*}}, 32
+; CHECK:       br i1 %[[exitcond]]
+; CHECK-NOT:   icmp eq i32 %{{.*}}, 100
+
+define void @invariant_ind(i32 addrspace(1)* nocapture %a, i32 %x) {
+entry:
+  %arr = alloca [64 x i32], align 4
+  %tmp1 = tail call i32 @llvm.amdgcn.workitem.id.x() #1
+  br label %for.cond2.preheader
+
+for.cond2.preheader:                              ; preds = %for.cond.cleanup5, %entry
+  %i.026 = phi i32 [ 0, %entry ], [ %inc10, %for.cond.cleanup5 ]
+  %idxprom = sext i32 %i.026 to i64
+  %arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %a, i64 %idxprom
+  %tmp15 = load i32, i32 addrspace(1)* %arrayidx, align 4
+  br label %for.body6
+
+for.cond.cleanup:                                 ; preds = %for.cond.cleanup5
+  %arrayidx13 = getelementptr inbounds [64 x i32], [64 x i32]* %arr, i32 0, i32 %x
+  %tmp16 = load i32, i32* %arrayidx13, align 4
+  %arrayidx15 = getelementptr inbounds i32, i32 addrspace(1)* %a, i32 %tmp1
+  store i32 %tmp16, i32 addrspace(1)* %arrayidx15, align 4
+  ret void
+
+for.cond.cleanup5:                                ; preds = %for.body6
+  %inc10 = add nuw nsw i32 %i.026, 1
+  %exitcond27 = icmp eq i32 %inc10, 32
+  br i1 %exitcond27, label %for.cond.cleanup, label %for.cond2.preheader
+
+for.body6:                                        ; preds = %for.body6, %for.cond2.preheader
+  %j.025 = phi i32 [ 0, %for.cond2.preheader ], [ %inc, %for.body6 ]
+  %add = add nsw i32 %j.025, %tmp1
+  %rem = srem i32 %add, 64
+  %arrayidx8 = getelementptr inbounds [64 x i32], [64 x i32]* %arr, i32 0, i32 %rem
+  store i32 %tmp15, i32* %arrayidx8, align 4
+  %inc = add nuw nsw i32 %j.025, 1
+  %exitcond = icmp eq i32 %inc, 100
+  br i1 %exitcond, label %for.cond.cleanup5, label %for.body6
+}
+
+; Check we do not enforce unroll if alloca is too big
+; CHECK-LABEL: @too_big
+; CHECK:       for.body:
+; CHECK:       icmp eq i32 %{{.*}}, 100
+; CHECK:       br
+
+define void @too_big(i32 addrspace(1)* nocapture %a, i32 %x) {
+entry:
+  %arr = alloca [256 x i32], align 4
+  %tmp1 = tail call i32 @llvm.amdgcn.workitem.id.x() #1
+  br label %for.body
+
+for.cond.cleanup:                                 ; preds = %for.body
+  %arrayidx5 = getelementptr inbounds [256 x i32], [256 x i32]* %arr, i32 0, i32 %x
+  %tmp15 = load i32, i32* %arrayidx5, align 4
+  %arrayidx7 = getelementptr inbounds i32, i32 addrspace(1)* %a, i32 %tmp1
+  store i32 %tmp15, i32 addrspace(1)* %arrayidx7, align 4
+  ret void
+
+for.body:                                         ; preds = %for.body, %entry
+  %i.015 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+  %idxprom = sext i32 %i.015 to i64
+  %arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %a, i64 %idxprom
+  %tmp16 = load i32, i32 addrspace(1)* %arrayidx, align 4
+  %add = add nsw i32 %i.015, %tmp1
+  %rem = srem i32 %add, 64
+  %arrayidx3 = getelementptr inbounds [256 x i32], [256 x i32]* %arr, i32 0, i32 %rem
+  store i32 %tmp16, i32* %arrayidx3, align 4
+  %inc = add nuw nsw i32 %i.015, 1
+  %exitcond = icmp eq i32 %inc, 100
+  br i1 %exitcond, label %for.cond.cleanup, label %for.body
+}
+
+declare i8 addrspace(2)* @llvm.amdgcn.dispatch.ptr() #1
+
+declare i32 @llvm.amdgcn.workitem.id.x() #1
+
+declare i32 @llvm.amdgcn.workgroup.id.x() #1
+
+declare i8 addrspace(2)* @llvm.amdgcn.implicitarg.ptr() #1
+
+attributes #1 = { nounwind readnone }