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