d56c06e6c9
This is combination of https://github.com/llvm/llvm-project/pull/138149 and https://github.com/llvm/llvm-project/pull/138039 which were opened separately for ease of reviewing. Only other change is adjustments in 2 tests which have gone in since. There are `DeclareOp` present for the variables mapped into target region. That allow us to generate debug information for them. But the `TargetOp` is still part of parent function and those variables get the parent function's `DISubprogram` as a scope. In `OMPIRBuilder`, a new function is created for the `TargetOp`. We also create a new `DISubprogram` for it. All the variables that were in the target region now have to be updated to have the correct scope. This after the fact updating of debug information becomes very difficult in certain cases. Take the example of variable arrays. The type of those arrays depend on the artificial `DILocalVariable`(s) which hold the size(s) of the array. This new function will now require that we generate the new variable and and new types. Similar issue exist for character type variables too. To avoid this after the fact updating, this PR generates a `DISubprogramAttr` for the `TargetOp` while generating the debug info in `flang`. Then we don't need to generate a `DISubprogram` in `OMPIRBuilder`. This change is made a bit more complicated by the the fact that in new scheme, the debug location already points to the new `DISubprogram` by the time it reaches `convertOmpTarget`. But we need some code generation in the parent function so we have to carefully manage the debug locations. This fixes issue `#134991`.
35 lines
1.5 KiB
MLIR
35 lines
1.5 KiB
MLIR
// RUN: mlir-translate -mlir-to-llvmir %s | FileCheck %s
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// Same test as omptarget-debug.mlir but with is_target_device = false.
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// Somehow test with omp.target don't work with -split-input-file.
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module attributes {omp.is_target_device = false} {
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llvm.func @_QQmain() {
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%0 = llvm.mlir.constant(1 : i32) : i32
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%1 = llvm.alloca %0 x i32 : (i32) -> !llvm.ptr
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%9 = omp.map.info var_ptr(%1 : !llvm.ptr, i32) map_clauses(tofrom) capture(ByRef) -> !llvm.ptr {name = ""}
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omp.target map_entries(%9 -> %arg0 : !llvm.ptr) {
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%13 = llvm.mlir.constant(1 : i32) : i32
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llvm.store %13, %arg0 : i32, !llvm.ptr loc(#loc2)
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omp.terminator
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} loc(#loc4)
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llvm.return
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} loc(#loc3)
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}
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#file = #llvm.di_file<"target.f90" in "">
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#cu = #llvm.di_compile_unit<id = distinct[0]<>,
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sourceLanguage = DW_LANG_Fortran95, file = #file, isOptimized = false,
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emissionKind = LineTablesOnly>
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#sp_ty = #llvm.di_subroutine_type<callingConvention = DW_CC_normal>
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#sp = #llvm.di_subprogram<id = distinct[1]<>, compileUnit = #cu, scope = #file,
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name = "_QQmain", file = #file, subprogramFlags = "Definition", type = #sp_ty>
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#sp1 = #llvm.di_subprogram<id = distinct[2]<>, compileUnit = #cu, scope = #file,
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name = "__omp_offloading_target", file = #file, subprogramFlags = "Definition",
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type = #sp_ty>
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#loc1 = loc("target.f90":1:1)
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#loc2 = loc("target.f90":46:3)
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#loc3 = loc(fused<#sp>[#loc1])
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#loc4 = loc(fused<#sp1>[#loc1])
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// CHECK-DAG: ![[SP:.*]] = {{.*}}!DISubprogram(name: "__omp_offloading_target"{{.*}})
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// CHECK-DAG: !DILocation(line: 46, column: 3, scope: ![[SP]])
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