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: .loc	1 1 42 prologue_end     ; /tmp/test_debug_value.cl:1:42
6; NOOPT-NEXT: s_load_dwordx2 s[4:5], s[4:5], 0x0
7; NOOPT-NEXT: .Ltmp
8; NOOPT-NEXT: ;DEBUG_VALUE: test_debug_value:globalptr_arg <- $sgpr4_sgpr5
9
10; GCN: flat_store_dword
11; GCN: s_endpgm
12define amdgpu_kernel void @test_debug_value(i32 addrspace(1)* nocapture %globalptr_arg) #0 !dbg !4 {
13entry:
14  tail call void @llvm.dbg.value(metadata i32 addrspace(1)* %globalptr_arg, metadata !10, metadata !13), !dbg !14
15  store i32 123, i32 addrspace(1)* %globalptr_arg, align 4
16  ret void
17}
18
19; Check for infinite loop in some cases with dbg_value in
20; SIOptimizeExecMaskingPreRA (somehow related to undef argument).
21
22; GCN-LABEL: {{^}}only_undef_dbg_value:
23; NOOPT: ;DEBUG_VALUE: test_debug_value:globalptr_arg <- [DW_OP_constu 1, DW_OP_swap, DW_OP_xderef] undef
24; NOOPT-NEXT: s_endpgm
25
26; OPT: s_endpgm
27define amdgpu_kernel void @only_undef_dbg_value() #1 {
28bb:
29  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
30  ret void
31}
32
33declare void @llvm.dbg.value(metadata, metadata, metadata) #1
34
35attributes #0 = { nounwind  }
36attributes #1 = { nounwind readnone }
37
38!llvm.dbg.cu = !{!0}
39!llvm.module.flags = !{!11, !12}
40
41!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)
42!1 = !DIFile(filename: "/tmp/test_debug_value.cl", directory: "/Users/matt/src/llvm/build_debug")
43!2 = !{}
44!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, retainedNodes: !9)
45!5 = !DISubroutineType(types: !6)
46!6 = !{null, !7}
47!7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64, align: 32)
48!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
49!9 = !{!10}
50!10 = !DILocalVariable(name: "globalptr_arg", arg: 1, scope: !4, file: !1, line: 1, type: !7)
51!11 = !{i32 2, !"Dwarf Version", i32 4}
52!12 = !{i32 2, !"Debug Info Version", i32 3}
53!13 = !DIExpression()
54!14 = !DILocation(line: 1, column: 42, scope: !4)
55