1; RUN: llc -O0 -march=amdgcn -mtriple=amdgcn-unknown-amdhsa -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,NOOPT %s
2; RUN: llc -march=amdgcn -mtriple=amdgcn-unknown-amdhsa -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,OPT %s
3
4; GCN-LABEL: {{^}}test_debug_value:
5; NOOPT: s_load_dwordx2 s[4:5]
6
7; FIXME: Why is the SGPR4_SGPR5 reference being removed from DBG_VALUE?
8; NOOPT: ; kill: def $sgpr8_sgpr9 killed $sgpr4_sgpr5
9; NOOPT-NEXT: ;DEBUG_VALUE: test_debug_value:globalptr_arg <- undef
10
11; GCN: flat_store_dword
12; GCN: s_endpgm
13define amdgpu_kernel void @test_debug_value(i32 addrspace(1)* nocapture %globalptr_arg) #0 !dbg !4 {
14entry:
15  tail call void @llvm.dbg.value(metadata i32 addrspace(1)* %globalptr_arg, metadata !10, metadata !13), !dbg !14
16  store i32 123, i32 addrspace(1)* %globalptr_arg, align 4
17  ret void
18}
19
20; Check for infinite loop in some cases with dbg_value in
21; SIOptimizeExecMaskingPreRA (somehow related to undef argument).
22
23; GCN-LABEL: {{^}}only_undef_dbg_value:
24; NOOPT: ;DEBUG_VALUE: test_debug_value:globalptr_arg <- [DW_OP_constu 1, DW_OP_swap, DW_OP_xderef] undef
25; NOOPT-NEXT: s_endpgm
26
27; OPT: s_endpgm
28define amdgpu_kernel void @only_undef_dbg_value() #1 {
29bb:
30  call void @llvm.dbg.value(metadata <4 x float> undef, metadata !10, metadata !DIExpression(DW_OP_constu, 1, DW_OP_swap, DW_OP_xderef)) #2, !dbg !14
31  ret void
32}
33
34declare void @llvm.dbg.value(metadata, metadata, metadata) #1
35
36attributes #0 = { nounwind  }
37attributes #1 = { nounwind readnone }
38
39!llvm.dbg.cu = !{!0}
40!llvm.module.flags = !{!11, !12}
41
42!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 244715) (llvm/trunk 244718)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
43!1 = !DIFile(filename: "/tmp/test_debug_value.cl", directory: "/Users/matt/src/llvm/build_debug")
44!2 = !{}
45!4 = distinct !DISubprogram(name: "test_debug_value", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !9)
46!5 = !DISubroutineType(types: !6)
47!6 = !{null, !7}
48!7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64, align: 32)
49!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
50!9 = !{!10}
51!10 = !DILocalVariable(name: "globalptr_arg", arg: 1, scope: !4, file: !1, line: 1, type: !7)
52!11 = !{i32 2, !"Dwarf Version", i32 4}
53!12 = !{i32 2, !"Debug Info Version", i32 3}
54!13 = !DIExpression()
55!14 = !DILocation(line: 1, column: 42, scope: !4)
56