72429a42ac
This may be seen as a hack, but it allows for any piece of MLIR to be able to end up with DWARF debug info through LLVM. Assuming the operations in the function have location such as FileLineCol, this provides backtraces with line tables and allows to step in a debugger. That makes this pass a perfect companion to -snapshot-op-locations It was also the default behavior of MLIR to LLVM IR translation until MLIR got support for proper debug info attributes. Differential Revision: https://reviews.llvm.org/D144069
60 lines
3.4 KiB
MLIR
60 lines
3.4 KiB
MLIR
// RUN: mlir-opt %s --pass-pipeline="builtin.module(llvm.func(ensure-debug-info-scope-on-llvm-func))" --split-input-file --mlir-print-debuginfo | FileCheck %s
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// CHECK-LABEL: llvm.func @func_no_debug()
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// CHECK: llvm.return loc(#loc
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// CHECK: loc(#loc[[LOC:[0-9]+]])
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// CHECK: #di_file = #llvm.di_file<"<unknown>" in "">
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// CHECK: #di_subprogram = #llvm.di_subprogram<compileUnit = #di_compile_unit, scope = #di_file, name = "func_no_debug", linkageName = "func_no_debug", file = #di_file, line = 1, scopeLine = 1, subprogramFlags = "Definition|Optimized", type = #di_subroutine_type>
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// CHECK: #loc[[LOC]] = loc(fused<#di_subprogram>
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llvm.func @func_no_debug() {
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llvm.return loc(unknown)
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} loc(unknown)
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// -----
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// Test that existing debug info is not overwritten.
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// CHECK-LABEL: llvm.func @func_with_debug()
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// CHECK: llvm.return loc(#loc
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// CHECK: loc(#loc[[LOC:[0-9]+]])
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// CHECK: #di_file = #llvm.di_file<"<unknown>" in "">
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// CHECK: #di_subprogram = #llvm.di_subprogram<compileUnit = #di_compile_unit, scope = #di_file, name = "func_with_debug", linkageName = "func_with_debug", file = #di_file, line = 42, scopeLine = 42, subprogramFlags = "Definition|Optimized", type = #di_subroutine_type>
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// CHECK: #loc[[LOC]] = loc(fused<#di_subprogram>
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module {
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llvm.func @func_with_debug() {
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llvm.return loc(#loc1)
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} loc(#loc2)
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} loc(#loc)
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#di_file = #llvm.di_file<"<unknown>" in "">
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#di_subroutine_type = #llvm.di_subroutine_type<callingConvention = DW_CC_normal>
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#loc = loc("foo":0:0)
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#loc1 = loc(unknown)
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#di_compile_unit = #llvm.di_compile_unit<sourceLanguage = DW_LANG_C, file = #di_file, producer = "MLIR", isOptimized = true, emissionKind = LineTablesOnly>
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#di_subprogram = #llvm.di_subprogram<compileUnit = #di_compile_unit, scope = #di_file, name = "func_with_debug", linkageName = "func_with_debug", file = #di_file, line = 42, scopeLine = 42, subprogramFlags = "Definition|Optimized", type = #di_subroutine_type>
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#loc2 = loc(fused<#di_subprogram>[#loc1])
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// -----
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// Test that a compile unit present on a module op is used for the function.
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// CHECK-LABEL: llvm.func @propagate_compile_unit()
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// CHECK: llvm.return loc(#loc
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// CHECK: loc(#loc[[FUNCLOC:[0-9]+]])
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// CHECK: loc(#loc[[MODULELOC:[0-9]+]])
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// CHECK-DAG: #[[DI_FILE_MODULE:.+]] = #llvm.di_file<"bar.mlir" in "baz">
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// CHECK-DAG: #[[DI_FILE_FUNC:.+]] = #llvm.di_file<"file.mlir" in "">
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// CHECK-DAG: #loc[[FUNCFILELOC:[0-9]+]] = loc("file.mlir":9:8)
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// CHECK-DAG: #di_compile_unit = #llvm.di_compile_unit<sourceLanguage = DW_LANG_C, file = #[[DI_FILE_MODULE]], producer = "MLIR", isOptimized = true, emissionKind = LineTablesOnly>
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// CHECK-DAG: #di_subprogram = #llvm.di_subprogram<compileUnit = #di_compile_unit, scope = #[[DI_FILE_FUNC]], name = "propagate_compile_unit", linkageName = "propagate_compile_unit", file = #[[DI_FILE_FUNC]], line = 9, scopeLine = 8, subprogramFlags = "Definition|Optimized", type = #di_subroutine_type>
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// CHECK-DAG: #loc[[MODULELOC]] = loc(fused<#di_compile_unit>[#loc])
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// CHECK-DAG: #loc[[FUNCLOC]] = loc(fused<#di_subprogram>[#loc[[FUNCFILELOC]]
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module {
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llvm.func @propagate_compile_unit() {
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llvm.return loc(unknown)
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} loc("file.mlir":9:8)
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} loc(#loc)
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#di_file = #llvm.di_file<"bar.mlir" in "baz">
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#di_compile_unit = #llvm.di_compile_unit<sourceLanguage = DW_LANG_C, file = #di_file, producer = "MLIR", isOptimized = true, emissionKind = LineTablesOnly>
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#loc = loc(fused<#di_compile_unit>["foo.mlir":2:1])
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