1 files changed, 45 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AMDGPU/call-constant.ll b/llvm/test/CodeGen/AMDGPU/call-constant.ll
new file mode 100644
index 00000000000..19aadfc96ad
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/call-constant.ll
@@ -0,0 +1,45 @@
+; RUN: llc -mtriple=amdgcn-amd-amdhsa < %s | FileCheck -check-prefix=GCN %s
+
+; FIXME: Emitting unnecessary flat_scratch setup
+
+; GCN-LABEL: {{^}}test_call_undef:
+; GCN: s_mov_b32 s8, s7
+; GCN: s_mov_b32 flat_scratch_lo, s5
+; GCN: s_add_u32 s4, s4, s8
+; GCN: s_lshr_b32
+; GCN: s_endpgm
+define amdgpu_kernel void @test_call_undef() #0 {
+  %val = call i32 undef(i32 1)
+  %op = add i32 %val, 1
+  store volatile i32 %op, i32 addrspace(1)* undef
+  ret void
+}
+
+; GCN-LABEL: {{^}}test_tail_call_undef:
+; GCN: s_waitcnt
+; GCN-NEXT: .Lfunc_end
+define i32 @test_tail_call_undef() #0 {
+  %call = tail call i32 undef(i32 1)
+  ret i32 %call
+}
+
+; GCN-LABEL: {{^}}test_call_null:
+; GCN: s_mov_b32 s8, s7
+; GCN: s_mov_b32 flat_scratch_lo, s5
+; GCN: s_add_u32 s4, s4, s8
+; GCN: s_lshr_b32
+; GCN: s_endpgm
+define amdgpu_kernel void @test_call_null() #0 {
+  %val = call i32 null(i32 1)
+  %op = add i32 %val, 1
+  store volatile i32 %op, i32 addrspace(1)* null
+  ret void
+}
+
+; GCN-LABEL: {{^}}test_tail_call_null:
+; GCN: s_waitcnt
+; GCN-NEXT: .Lfunc_end
+define i32 @test_tail_call_null() #0 {
+  %call = tail call i32 null(i32 1)
+  ret i32 %call
+}