llvm/test/CodeGen/SPIRV/debug-info/debug-expression-bit-piece.ll

; RUN: llc --verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown --spirv-ext=+SPV_KHR_non_semantic_info %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=VERIFY
; RUN: llc --verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown --spirv-ext=+SPV_KHR_non_semantic_info %s -o - | FileCheck %s --implicit-check-not=Debug
; RUN: %if spirv-tools %{ llc --verify-machineinstrs --spirv-ext=+SPV_KHR_non_semantic_info -O0 -mtriple=spirv64-unknown-unknown %s -o - -filetype=obj | spirv-val %}

; DW_OP_bit_piece is the DWARF counterpart of NonSemantic.Shader.DebugInfo.100
; BitPiece (encoding 4). The IR verifier currently rejects it.
; If rejected, the debug information is dropped, and llc continues the execution.

; Future implementation must be careful with the following:
; DW_OP_bit_piece is (size, offset); NSDI BitPiece is (offset, size).

; VERIFY: invalid expression
; VERIFY: !DIExpression(157, 32, 8)
; VERIFY: warning: ignoring invalid debug info

; CHECK: OpFunction

target triple = "spirv64-unknown-unknown"

define spir_func void @f() !dbg !5 {
entry:
  %x = alloca i32, align 4
    #dbg_declare(ptr %x, !9, !DIExpression(DW_OP_bit_piece, 32, 8), !10)
  store i32 1, ptr %x, align 4, !dbg !10
  ret void, !dbg !10
}

!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!2, !3}

!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "debug-expression-bit-piece.c", directory: "/src")
!2 = !{i32 7, !"Dwarf Version", i32 5}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = !DISubroutineType(types: !6)
!6 = !{null}
!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!5 = distinct !DISubprogram(name: "f", linkageName: "f", scope: !1, file: !1, line: 1, type: !4, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0)
!9 = !DILocalVariable(name: "x", scope: !5, file: !1, line: 2, type: !7)
!10 = !DILocation(line: 3, column: 1, scope: !5)